JPH0820969A - Method and device for holding control panel for construction machine - Google Patents

Abstract

PURPOSE:To protect a control panel for a construction machine from vibration. CONSTITUTION:A holding device body 32 is mounted on the upper part of a base 26, attached to the revolving frame 14 of a construction machine, through a vibration insulation rubber 34. The holding device body 32 forms a double box structure consisting of an outer box 36 and an inner frame 40 to contain a control panel container 38. First air cylinder units coupled to the side of the control panel container 38 by outer boxes 36 serving as a support part, and second air cylinder units coupled to the bottom of the control panel container 38 and install in such a manner to expand and contract toward one point on the center of gravity line of the control panel container 38 are provided. The first and second air cylinder units are connected in parallel to an air feeding device driven by an engine for the construction machine and the control panel container 38 is held in a floating state during the starting of the engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel holding method and apparatus for construction machines and the like, and more particularly to a control panel for stably mounting and holding a control panel mounted on a work machine such as a power shovel. A holding method and device.

[0002]

2. Description of the Related Art Conventionally, construction machines such as power shovels are equipped with a control panel for controlling operation of hydraulic valves and the like in order to remotely control work elements such as shovels, arms and booms. Such a control panel is directly fixed to the main frame of the main body with bolts or the like, or is fixed via a rubber plate.

[0003]

However, when the control panel is attached to the main body of the machine directly or via the rubber plate, the operation reaction force of a remotely operated shovel or the like is applied to the machine, which causes There was a problem that excessive vibration was transmitted to the control panel. In particular, the direction of vibration is unspecified, and it has been a cause of damage to electrical components inside the control panel and deterioration of durability due to overload operation.

The present invention focuses on the above-mentioned conventional problems, and prevents the vibration from the main body from being directly transmitted to the control panel during the operation of the construction machine, thereby protecting the electric components inside the control panel. An object is to provide a control panel holding device.

[0005]

In order to achieve the above object, a method for holding a control panel for a construction machine or the like according to the present invention is such that a control panel for a construction machine or the like can be floated from a construction machine body frame by an air cylinder. The control board is levitated from the main body frame and held by supplying compressed air to the air cylinder simultaneously with the engine operation by an air source driven by the engine operation of the construction machine.

Further, in a control panel holding device for a construction machine or the like according to the present invention, a member for accommodating a control panel container is attached to a construction machine body frame via an air cylinder unit, and the air cylinder unit is used as an engine of the construction machine. It is connected in parallel to the air supply device driven by. In this case, the air cylinder unit may be configured to include at least a plurality of air cylinders that are attached so as to extend and contract with respect to the center of gravity of the control panel housing member.

Further, in the control panel holding device according to the present invention, the first mounting member mounted between the construction machine main body frame side and the construction machine main frame side via the anti-vibration rubber and the first mounting member can be housed. And a second mounting member for accommodating and fixing the control panel container, and a first air cylinder unit connecting the side surface of the second mounting member and the first mounting member, a bottom surface of the second mounting member, and a first mounting member. And a second air cylinder unit that is installed so that the expansion / contraction direction is directed toward the center of gravity of the second mounting member, and the first and second air cylinder units are an air supply driven by the engine of the construction machine. The device may be connected in parallel.

[0008]

According to the above construction, the control panel can be kept in a state of being kept floating from the body frame at all times while the engine is being started.
Since the vibration from the body frame is not directly transmitted to the control panel due to the adoption of anti-vibration rubber, it is possible to effectively prevent vibration from being applied to the electrical components inside the control panel, thus improving the durability of the control panel. And it is possible to reliably prevent damage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a control panel holding method and apparatus for construction machines and the like according to the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 5, the control panel holding device according to the embodiment is a power shovel 10 as a construction machine.
It is supposed to be installed in. As is well known, the power shovel 10 has a swivel frame 14 provided with an operator's cab on an upper part of a crawler 12, a boom 16 is attached to the swivel frame 14 so as to be able to move up and down, and an arm 18 is provided at a tip portion thereof.
Is attached so that it can be bent, and work such as excavation is performed by the bucket shovel 20 at the end of the arm. A traveling movement, a rotational drive of the revolving frame 14, or a work operation by the boom 16, the arm 18, and the bucket shovel 20 is performed by an operation in the operator's cab, and a control panel 22 for controlling hydraulic equipment is provided for these operations. A holding device 24 for holding the control board 22 is installed on the upper surface of the revolving frame 14 which constitutes the main body of the construction machine.

The specific structure of the control panel holding device 24 is shown in FIGS. First, the mounting base 26 is installed on the upper surface of the revolving frame 14. The mounting base 26 serves as a mounting seat for the holding device 24, and has a structure in which a rectangular box frame 28 is formed by an angle member, an outer side surface portion thereof is covered with a cover plate 30, and upper and lower surfaces are opened. The mounting base 26 is mounted and fixed on the upper surface of the revolving frame 14 so as to close the lower opening, and the holding device main body 32 is mounted on the upper portion. A vibration-proof rubber 34 is attached between the mounting base 26 and the holding device main body 32 to be mounted so as to suppress the transmission of vibrations from the turning frame 14 side to the holding device main body 32. The anti-vibration rubber 34 has a V-shaped structure, and two anti-vibration rubbers 34 are arranged at each corner of the box frame 28 to support the upper holding device body 32.

The holding device main body 32 has a double box structure composed of an outer box 36 constituting a first mounting member and a control board container 38 arranged inside the outer box 36. An internal frame 40 as a second mounting member for fixing and holding is integrally equipped. The outer box 36 is composed of a lower case 36B and an upper cover case 36C that are vertically divided into two parts and are flange-joined to each other.
It is mounted on the mounting base 26 while being supported by. on the other hand,
The inner frame 40 is frame-formed so as to accommodate the lower half of the control panel container 38, and the angle members 42 attached to the pair of outer surfaces of the control panel container 38 are mounted on the upper edge flange of the inner frame 40. It is integrated with the control panel container 38 by placing and bolting.

In such a structure, the inner frame 4 accommodating the outer box 36 and the control board container 38.
An air cylinder unit for floating and holding the control panel container 38 inside the outer box 36 is provided between the control unit and the control unit 0. This is composed of a first air cylinder unit 44 that bears a vertical load and a second air cylinder unit 46 that bears a side load.

The first air cylinder unit 44 is disposed between the central portion of the side surface of the inner frame 40 and the central portion of the inward flange formed at the lower edge of the lower case 36B of the outer box 36, and has four peripheral side surfaces. It is composed of four air cylinders 44S attached to the part.

Further, the second air cylinder unit 46 is
It is composed of four air cylinders 46S arranged at four corners of the inner frame 40 and the outer box 36. And, each of these air cylinders 46S
The rear end of the cylinder is pivotally attached to the corner of the outer box 36, the tip of the rod is connected to the bottom of the inner frame 40, and the direction of expansion and contraction of the rod is the inner frame 40 and the control panel container 38 housed integrally in the inner frame 40. It is set so as to be directed to a point P on the center of gravity G of the box body. In order to connect the cylinder rods, a swash plate 48 is provided at the bottom of the corner of the inner frame 40 so as to traverse the corner.

By the way, the first and second air cylinder units 44 and 46 are connected in parallel to an air supply device driven by the engine of the power shovel 10. This configuration is shown in FIG. A hydraulic motor 52 driven by the engine 50 is provided, and an air compressor 54 operated by the output of the motor is provided. A check valve 56 for preventing backflow and an accumulator 62 composed of an air tank 60 with a safety valve 58 are interposed in the output side pipe 55 of the compressor 54, and compressed air is supplied in a state in which pulsation is prevented. A first air cylinder unit 44 and a second air cylinder unit 46 are connected in parallel to the outlet side of the accumulator 62 via branch pipes 64 (64A, 64B). A filter 66 for removing dust, a regulator valve 68, and a mist separator 70 are provided in each of the branch pipes 64, and a decompression valve 72 is provided at the final stage to supply compressed air to the air cylinder units 44 and 46 under reduced pressure. ing. As a result, when the engine 50 is started, the air compressor 54 operates, and the air pressure from the air tank 60 operates the cylinders 44S and 46S of the air cylinder units 44 and 46 to drive the rods to extend and float the control plate container 38. be able to. The air pressure is set by the pressure reducing valve 72, and is automatically maintained at this pressure.

The check valve 56, the accumulator 62 and a parallel pipe line are provided, and an unloader valve 74 and a governor 76 are provided in the pipe line to release the circuit pressure when the circuit pressure exceeds a predetermined pressure. I am trying.

Reference numeral 78 in the drawing denotes a heat radiation duct for the control panel container 38. Further, in the figure, 80 is the internal frame 40.
And a lower case 36B of the outer box 36 to prevent the inner frame 40, and thus the control board container 38, from rising above a certain level. .

The control panel holding device 24 constructed as described above
Then, by starting the engine 50 of the power shovel 10, the air compressor 54 operates and compressed air is supplied from the air tank 60 to the air cylinder units 44, 46. While the engine 50 is being started, the compressor 54 always operates, and the air cylinder units 44 and 46 are extended by the air pressure set by the pressure reducing valve 72 to hold the control panel container 38 hollow. As a result, in the control panel holding device 24, the internal control panel container 38 is held hollow inside the outer box 36. Although the control board container 38 is thus floated and held in the hollow state, the mounting base 26 is directly fixed to the revolving frame 14, and the eight V-shaped anti-vibration rubbers 34 are attached to the mounting base 26. Via the external box 36 of the holding device body 32
Vibrations from the swivel frame 14 are first damped here. Inside the outer box 36 in which the vibration is damped, the first air cylinder unit 44
Holds the side surface portion of the control board container 38, and the other second air cylinder units 46 hold the bottom surface of the control board container 38 from all sides, so that there is no vertical or horizontal direction acting on the holding device body 32. The effect of suppressing vibration in a specific direction is high. When vibration acts, each cylinder 44S, 46S of the air cylinder units 44, 46 acts as a damper by air compression, which has a vibration suppressing effect.
The control board container 38 will be protected from vibration. Also,
In particular, since the expansion and contraction direction of each cylinder 46S of the second air cylinder unit 46 that holds the bottom surface is directed to the fixed point P on the center of gravity line G of the control panel container 38, the control panel container 38
The vibration damping effect of is high.

When the engine 50 is stopped, the compressor 54 is stopped, so that the air cylinder unit 4 is stopped.
4, 46 contract, and the control board container 38 moves to the inner frame 40
And lower case 36B of the outer box 36
It is housed inside.

[0021]

As described above, according to the method and apparatus for holding a control panel of a construction machine or the like according to the present invention, the control panel is floated and held by the air cylinder from the main body of the construction machine. Vibration can be effectively prevented from reaching the control panel. Therefore, a large vibration does not reach the control panel during excavation work using the construction machine, and it is possible to reliably prevent the electrical components of the control panel from being damaged or damaged by the vibration. . In particular, a high damping effect can be obtained by holding the air cylinder unit hollow with an anti-vibration rubber interposed, and even if an impact force is generated by the operation of a construction machine, the control panel can be sufficiently protected. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view of a control panel holding device according to an embodiment.

FIG. 2 is a plan view of the control panel holding device.

FIG. 3 is an exploded perspective view of the control panel holding device excluding an air cylinder unit.

FIG. 4 is a circuit diagram of an air cylinder unit.

FIG. 5 is a perspective view of a power shovel equipped with a control panel holding device.

[Explanation of symbols]

 10 Power Shovel 12 Crawler 14 Revolving Frame 16 Boom 18 Arm 20 Bucket Shovel 22 Control Panel 24 Control Panel Holding Device 26 Mounting Base 28 Box Frame 30 Cover Plate 32 Holding Device Main Body 34 V-Type Anti-Vibration Rubber 36 External Box 38 Control Panel Container 40 Inner frame 42 Angle material 44 First air cylinder unit 46 Second air cylinder unit 48 Swash plate 50 Engine 52 Hydraulic motor 54 Air compressor 56 Check valve 58 Safety valve 60 Air tank 62 Accumulator 64 Branch pipe 66 Filter 68 Regulator valve 70 Mist separator 72 Decompression Valve 74 Unload valve 76 Governor 78 Heat dissipation duct 80 Stopper

Claims (4)

[Claims] 1. A control panel of a construction machine or the like can be floated from a construction machine body frame by an air cylinder, and compressed air is supplied to the air cylinder simultaneously with the engine operation by an air source driven by the engine operation of the construction machine. A control panel holding method for construction machines or the like, characterized in that the control panel is levitated from the body frame and held thereby. 2. A member for accommodating a control panel container is attached to a construction machine body frame via an air cylinder unit, and the air cylinder unit is connected in parallel to an air supply device driven by an engine of the construction machine. Control panel holding device for construction machinery, etc. 3. The control panel for a construction machine or the like according to claim 2, wherein the air cylinder unit includes at least a plurality of air cylinders mounted in a direction of expansion and contraction with respect to the center of gravity of the control panel housing member. Holding device. 4. A first mounting member mounted between the construction machine main body frame side and a frame via a vibration-proof rubber, and a second mounting member which is housed in the first mounting member and which houses and fixes a control panel container. A first air cylinder unit for connecting the side surface of the second mounting member and the first mounting member, the bottom surface of the second mounting member and the first member, and the expansion and contraction direction And a second air cylinder unit installed toward the center of gravity of the mounting member, wherein the first and second air cylinder units are connected in parallel to the air supply device driven by the engine of the construction machine. Control panel holding device for characteristic construction machinery.