JPH10292433A - Working machine with driver's cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain comfortability by arranging a controller for controlling the necessary work by a working machine in a space provided on the underside of an operator's seat so as to store it compact and expand the space in a cabin. SOLUTION: An operator's seat 21 installed on the floor plate 18 of a cabin comprises a support 22, a box 23, and a seat 25. The support 22 supports the seat 25 from the underside through the box 23 so that the seat 25 is positioned at a fixed height relative to the floor plate 18. A controller 27 is stored in a space 24 formed inside the box 23, and its upper side is covered with the installation plate 25c of the seat 25. Also a harness 28 connected to the rear side of the controller 27 is extracted, through a harness inserting hole 18a in the floor plate 18, to the outside of the space 24 through a harness extraction hole 23D in the box 23, and connected to a prime mover, a hydraulic pump, and control valves of a hydraulic circuit in a machine room 14 located on the outside of an operator room 17. In addition, the controller 21 is stored compact in the space 24 formed inside the box 23 arranged on the underside of the seat 25 so as to maintain comfortability by expanding the interior of the operator's cab.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine with an operator's cab suitably used as, for example, a hydraulic shovel, a hydraulic crane, a wheel loader, and the like, and more particularly, to a controller for controlling a hydraulic pump, an engine, a monitor, and the like. The present invention relates to a working machine with a cab provided.

[0002]

2. Description of the Related Art Generally, a working machine with a cab, such as a hydraulic shovel, has a cab provided on a main body of the working machine and a driving chair mounted on a floor plate, and controls necessary for work by the main body of the working machine. And a controller to perform.

In this type of conventional hydraulic excavator, an upper revolving structure as a working machine body is mounted on a lower traveling structure, and a prime mover,
A machine room containing a hydraulic pump and the like is provided together with the operation room.

The cab according to the prior art will be described with reference to FIGS. 6 and 7. The cab 1 has a floor plate 3 mounted on a revolving frame 2 and a box shape mounted on the floor plate 3. And the cab box 4.

In the prior art shown in FIG. 6, the controller 5 is located, for example, in the driver's
Is mounted on the floor plate 3 via a pedestal 7 or the like provided with a vibration isolating member (not shown) such as rubber and cushion, and a protective cover 8 attached to the floor plate 3. Protected from external dust and moisture.

In the prior art shown in FIG. 7, the controller 5 is mounted on the rear surface of the cab box 4 via a vibration isolating member, and the controller 5 is covered by a protective cover 8 mounted on the cab box 4. , And are protected from external dust and moisture.

The harness 5A connected to the controller 5 extends from the cab 1 toward the machine room, and has a distal end connected to a hydraulic pump or the like. Thereby, the controller 5 is configured to control, for example, the discharge amount of the hydraulic pump according to the operating state of the hydraulic shovel.

[0008]

By the way, in the above-mentioned prior art, the controller 5 is mounted on the floor plate 3 and the rear surface of the cab box 4 in the cab 1 together with the vibration isolating member, the pedestal 7 and the like, and these are protected by the protective cover. Since the configuration is such that the controller 8 covers the controller 5, not only a space for disposing the controller 5 in the operator's cab 1 is required, but also the number of components for mounting the controller 5 is increased.

In particular, in the case of a small hydraulic excavator, the operator cab 1 and the like are formed compact in order to reduce the size of the working machine body. 1, the layout at the time of design is restricted, and the livability in the driver's cab 1 is reduced.

When the controller 5 is to be inspected and maintained, the protective cover 8 and the controller 5 are removed from the floor plate 3 or the cab box 4 in a relatively narrow space at the rear side of the driving chair 6. Work must be performed, and there is a problem that workability during maintenance deteriorates.

When the controller 5 is mounted on the rear surface of the cab box 4 or the like, the harness 5A extends to the machine room side. In order to perform such operations, it is necessary to remove the controller 5 from the cab box 4 or remove the harness 5A from the controller 5, which also deteriorates the maintainability of the excavator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention enables a controller to be compactly housed in a driver's cab, reliably reduces the number of parts for mounting the controller, and inspects the controller. An object of the present invention is to provide a working machine with an operator's cab that can perform maintenance and the like with simple work and can improve the maintainability of the working machine.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is an operation cab provided on a work machine main body and having a driving chair mounted on a floor plate, and a work performed by the work machine main body. A working machine with a cab comprising a controller for performing necessary control, wherein the driving chair is provided with a space below the seat, and the controller is arranged in the space. Has adopted.

With this configuration, a space for the controller can be arranged below the seat of the driving chair, so that the controller can be compactly accommodated below the seat and the space in the driver's cab can be expanded. Therefore, it is possible to secure the livability and the like, and increase the degree of freedom of the layout in the driver's cab.

According to the second aspect of the present invention, there is provided a driving chair, comprising: a column provided upright from a floor plate; and a box provided on an upper end side of the column and having a space in which the controller is disposed. And a seat provided on a box.

Thus, a space for the controller can be formed by the box between the column of the driving chair and the seat, and the controller can be compactly accommodated under the seat. Then, for example, by forming the box into a box shape with an open upper side and covering the upper side of the box with a seat, when performing maintenance or the like of the controller, simply remove the seat from the upper side of the box. The controller can be attached to and detached from the internal space. Further, the controller in the space can be shut off from the outside by the box and the seat.

Further, in the invention according to claim 3, the driving chair comprises: a column erected from a floor plate; and a box provided on an upper end side of the column and having a space in which the controller is disposed. It comprises a slide mechanism provided on the box and a seat provided on the slide mechanism.

Further, in the invention according to claim 4, the box is provided with a harness drawing hole for drawing the honey of the controller to the outside, and the harness drawing hole is provided with a sealing member for sealing the space to the outside. It is configured to be provided.

Thus, the harness of the controller disposed in the space in the box can be drawn out,
In this state, the inside of the space can be maintained in a sealed state by the sealing member.

[0020]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 5 show an embodiment of the present invention. In this embodiment, a small hydraulic excavator will be described as an example of a working machine with a cab.

Reference numeral 11 denotes the lower traveling body, and 12 denotes the lower traveling body 1.
1 shows an upper revolving structure as a working machine main body that is rotatably mounted on 1. On a revolving frame 13 of the upper revolving structure 12, a machine room 14 and a counterweight 15 are provided together with an operation room 17 described later. I have.

In the machine room 14, a prime mover whose operation state is controlled by a controller 27 described later, a hydraulic pump driven by the prime mover, a hydraulic circuit (all not shown), and the like are arranged. . Also, the turning frame 1
A working device 16 for performing excavation work such as earth and sand is attached to the front side of 3 so as to be able to move up and down.

In this excavator, since the upper revolving unit 12 is disposed within a small turning radius, the machine room 14, the operator's cab 17 and the like are compactly formed. It is a configuration that can be performed.

Reference numeral 17 denotes an operator's cab provided on the revolving frame 13. The operator's cab 17 includes a floor plate 18 mounted on the upper side of the revolving frame 13 and an upper surface 19, as shown in FIG.
A, a front box 19B, a rear box 19C, and a substantially box-shaped cab box 19 having left and right side panels 19D and 19D (only one is shown).

The lower end of the cab box 19
Are fastened to the floor plate 18 by a plurality of bolts 20, 20,... And closed by the floor plate 18. In addition, floor board 1
8, a harness insertion hole 18A for the controller 27 is formed at the rear side of the driving chair 21 described later.

Numeral 21 denotes a driving chair 21 mounted on a floor plate 18 in the cab 17, and the driving chair 21 includes a support 22, a box 23 and a seat 25 which will be described later, as shown in FIGS. It is composed of

Numeral 22 denotes a column standing upright from the floor plate 18. The column 22 includes a cylindrical large-diameter portion 22A having a base end mounted on the floor plate 18 as shown in FIGS. Rod portion 22 slidably inserted into the distal end side inside diameter portion 22A
B.

The strut 22 has a seat 25 on the floor plate 18.
The seat 25 is supported from below by way of a box 23 so as to be at a fixed height position with respect to. In addition, prop 2
2, a shock absorber (not shown) made of, for example, a gas spring or the like is built in. The shock absorber is configured such that vibrations from the prime mover and the road surface during operation of the hydraulic excavator are transmitted through the floor plate 18 to the box 23 and the seat. Large-diameter part 2 transmitted to 25
It is damped between 2A and the rod portion 22B.

Reference numeral 23 denotes a box mounted on the upper end side of the column 22. Inside the box 23, FIG.
As shown in FIG. 5, a space 24 described later is formed to accommodate the controller 27. And box 23
Is a bottom plate 23A of a substantially square shape attached to the upper end side of the column 22, and front, rear, left, and right side plate portions 23 extending upward from four sides of the bottom plate 23A with a certain height.
B, 23B,...

At the upper end side of each side plate portion 23B, mounting portions 23C, 23C,... For the seat 25 are formed to be bent outward, and the rear side plate portion 23B is provided with a structure shown in FIG.
As shown in FIG.
3D is formed.

Reference numeral 24 denotes a space formed in the box 23 for the controller 27. The space 24 accommodates the controller 27. Then, in this state, the space 2
4, the upper side is covered by the mounting plate 25C of the seat 25,
It is shut off from the outside.

Reference numeral 25 denotes a seat (seat) provided on the box 23. The seat 25 is formed in a substantially rectangular shape and extends horizontally, and extends upward from the rear end side of the seat 25A. Backrest 25B and seat 2
5A, a plurality of bolts 26,
26,... And the like, and a mounting plate 25C mounted to each mounting portion 23C of the box 23.

Reference numeral 27 denotes a controller housed in the space portion 24. The controller 27 is formed as a rectangular parallelepiped box as shown in FIGS. 3 and 4, and has a pair of left and right Flanges 27A, 27A are protruded. Each flange 27A is attached to the bottom plate 23A of the box 23 via screws (not shown) or the like.

A harness 28 is connected to the rear side of the controller 27 via a connector 27B.
Then, the harness 28 is drawn out of the space 24 through the harness drawing hole 23D of the box 23, and further through the harness insertion hole 18A of the floor plate 18,
Of the machine room 1
4 extend to the prime mover, hydraulic pump, control valve of the hydraulic circuit, and the like.

The controller 27 outputs a control signal via a harness 28 to a tilting mechanism (not shown) attached to the hydraulic pump, for example, so that the tilting angle of the hydraulic pump by the tilting mechanism is output. And the discharge amount of the hydraulic pump is controlled in accordance with the operating state of the hydraulic shovel. Further, the controller 27 includes, for example, fuel,
Monitor control for monitoring the remaining amount of the cooling water and the like, excavation control for controlling the excavation operation by the working device 16 and the like are performed as necessary.

29 is a harness draw-out hole 2 of the box 23
The grommet seal 29 is a grommet seal as a seal member mounted on the 3D. The grommet seal 29 is located between the grommet seal 29 and the harness 28 of the controller 27.
4 is sealed. Reference numeral 30 denotes a grommet seal attached to the harness insertion hole 18A of the floor panel 18 for sealing the inside of the cab 17.

The hydraulic excavator according to the present embodiment has the above-described configuration, and its operation will be described next.

First, during operation of the hydraulic shovel, when the hydraulic pump is driven by the prime mover, the hydraulic oil discharged from the hydraulic pump is supplied to a hydraulic actuator or the like of the working device 16, whereby the hydraulic shovel is operated by the working device. 1
6 is operated to excavate earth and sand.

When the maintenance of the controller 27 is performed, the bolts 26 are first loosened and the driving chair 21 is loosened.
By removing the seat 25 from the upper side of the box 23, the controller 27 in the space 24 is exposed. Then, in this state, the controller 27 is removed from the bottom plate 23A of the box 23, and the controller 27 and the connector 2 are removed.
7B, the controller 27 is released.
Is carried out from the cab 17 to perform inspection and maintenance.

Further, for example, when the cab box 19 of the cab 17 is removed from the floor plate 18 for maintenance of the hydraulic excavator, the driving chair 21 and the controller 2 are used.
7 and the like are attached to the floor plate 18 side, and each bolt 20
The cab box 19 is removed from the floor plate 18 by loosening, and maintenance work or the like is performed on the excavator in this state.

Thus, according to the present embodiment, the box 23 is provided between the column 22 of the driving chair 21 and the seat 25, and the controller 27 is provided in the space 24 in the box 23.
The controller 27 is connected to the seat 2
5, it can be compactly accommodated in the space 24, and the lower side of the seat 25 (or around the column 22) can be used effectively. As a result, even in the case of a small hydraulic shovel in which the cab 17 and the like should be formed compactly, the cab 17 can be enlarged to secure comfort and the like, and the degree of freedom in layout in the cab 17 can be reliably increased. .

Further, the upper side of the box 23 is covered with the mounting plate 25C of the seat 25, and a grommet seal 29 for sealing between the box 23 and the harness 28 of the controller 27 is provided in the harness drawing hole 23D. Therefore, the controller 27 can be housed in the space 24 in a state where it is shielded from the outside, and it is possible to reliably prevent foreign substances such as dust and moisture from entering the controller 27.

Further, since the box 23 is mounted on the column 22 having a built-in shock absorber such as a gas spring, the controller 27 can be held at a position higher than the floor plate 18, and the controller 27 can be accidentally kicked. And prevent the object from dropping onto the controller 27 and stably attenuate the transmission of the vibration from the floor plate 18 to the controller 27 via the struts 22 and the like. It is possible to reliably protect against vibration, impact and the like transmitted from the 18 side.

In particular, when the driver of the hydraulic shovel or the like sits on the driving chair 21, the inertial mass of the controller 27 located on the column 22 can be increased by the weight thereof. The vibration on the high frequency side, which tends to adversely affect the controller 27 among the vibrations from the floor plate 18 side, can be efficiently attenuated by the shock absorber.

As a result, it is not necessary to provide a special mounting base, a vibration isolating member, a protective cover, and the like for the controller 27, so that the number of components for mounting the controller 27 can be reliably reduced, and the cost can be reduced. Reduction can be achieved.

Further, when the controller 27 is to be inspected and maintained, the bolts 26 are loosened and the seat 25 is simply removed from the upper side of the box 23, so that the controller 27 can be easily attached to and detached from the space 24. Thus, inspection and maintenance of the controller 27 can be performed efficiently.

Further, since the harness insertion hole 18A is formed in the floor plate 18 of the operator's cab 17, for example, when the maintenance of a hydraulic excavator is performed, the cab is mounted with the controller 27, the harness 28 and the like attached to the floor plate 18 side. Box 19
Can be removed from the floor plate 18 and maintenance can be reliably improved.

As shown in a modification of the embodiment shown in FIG. 5, a driving chair 31 is constituted by a support column 22, a box 23, a slide mechanism 32 and a seat 25, and a controller 24 is provided in a space 24 of the box 23. 27 may be accommodated.

Here, the slide mechanism 32 is connected to each bolt 2
6 and a pair of guide rails 32B, 32B mounted on the pedestal plate 32A, which are fastened to the respective mounting portions 23C of the box 23, and which are separated in the left and right directions and extend in the front-rear direction. And a pair of slide portions 32 attached to the lower surface of the attachment plate 25C of the seat 25 and slidably engaged with the guide rails 32B in the front-rear direction.
C, 32C, and the seat 25
By sliding with respect to each guide rail 32B together with 2C, the position is adjusted in the front-back direction.

Also in this case, by removing the seat 25 from the upper side of the box 23 together with the slide mechanism 32, the work of attaching and detaching the controller 27 to and from the space 24 can be easily performed.

In the above embodiment, the closed space 2
However, the present invention is not limited to this. For example, among the side plate portions 23B of the box 23, the front and rear side plate portions 23B disposed are omitted, and the space portion 24 is formed with the front and rear portions. A box having a shape opened in the direction may be used, and a hollow frame or the like having a fixed height is provided between the column 22 and the seat 25 of the driving chair 21 so that the controller 27 is located at this position. May be configured to secure a space for use.

In the above-described embodiment, the hydraulic shovel is described as an example of the working machine with a cab. However, the present invention is not limited to this. For example, a working vehicle such as a hydraulic crane and a wheel loader, a passenger car, a truck, etc. May be applied to the driver's cab or the like.

[0054]

As described in detail above, according to the first aspect of the present invention, a space for arranging the controller is provided below the seat of the driving chair. Can be compactly accommodated in the space located below, and the number of components for mounting the controller can be reliably reduced. As a result, even in the case of a small working machine in which the cab or the like is to be formed compactly, the cab can be enlarged to secure comfort and the like, and the degree of freedom in the layout of the cab can be increased. Also, for example, by using the seat of the driver's chair as a lid for the space for the controller, inspection and maintenance of the controller can be easily performed simply by removing the seat, and the maintainability of the working machine is reliably improved. Can be done.

According to the second aspect of the present invention, the driving chair comprises a support, a box and a seat,
According to the invention described in claim 3, the driving chair is provided with a support,
Since the controller is constituted by the box, the slide mechanism and the seat, the controller can be accommodated in the space of the box without specially using a protective cover or the like, and the number of components for mounting the controller can be reliably reduced. Then, by simply removing the seat or the slide mechanism from the upper side of the box, the operation of attaching and detaching the controller to and from the space inside the box can be easily performed, and the inspection and maintenance of the controller can be performed efficiently. In addition, the controller can be held at a position higher than the floor plate by the support pillar, and it is possible to reliably prevent the controller from being accidentally kicked or to drop an object on the controller, and for example, when washing the floor plate or the like in the cab. Can be prevented from accidentally pouring water on the controller. Further, the vibration from the floorboard side can be attenuated by using a gas spring for a chair provided on the column.

Further, according to the fourth aspect of the present invention,
A harness draw-out hole is provided in the box to draw out the controller honeys to the outside, and a seal member is provided in the harness draw-out hole. Foreign matter such as dust and moisture enters the space inside the box from the harness draw-out hole. Can be prevented, and the controller can be reliably protected against these foreign substances.

[Brief description of the drawings]

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

FIG. 2 is an enlarged longitudinal sectional view showing a cab in FIG. 1;

FIG. 3 is an enlarged sectional view showing the driving chair in FIG. 2 together with a controller.

FIG. 4 is a left side view of FIG. 3 showing a driving chair.

FIG. 5 is a left side view of a driving chair showing a modification of the embodiment according to the present invention.

FIG. 6 is a longitudinal sectional view showing a state in which a controller is mounted on a floor panel of a driver's cab according to a conventional technique.

FIG. 7 is a longitudinal sectional view similar to FIG. 6, showing a state in which a controller is mounted on a cab box of a cab according to the prior art.

[Explanation of symbols]

 Reference Signs List 12 upper revolving superstructure (working machine main body) 17 operator's cab 18 floor plate 21, 31 operating chair 22 support column 23 box 23D harness draw-out hole 24 space 25 seat 27 controller 29 grommet seal (seal member) 32 slide mechanism

Claims (4)

[Claims] 1. A work machine with a cab comprising: a cab provided on a work machine main body and a driving chair mounted on a floor plate; and a controller for performing control necessary for work by the work machine main body. A working machine with a driver's cab, wherein a space is provided below the seat in the chair, and the controller is disposed in the space. 2. The driving chair according to claim 1, wherein the driving chair is provided on a column which is provided upright from a floor plate, a box which is provided on an upper end side of the column and has a space in which the controller is disposed. The working machine with a cab according to claim 1, comprising a seat and a seat. 3. The driving chair is provided with a column standing upright from a floor plate, a box provided at an upper end side of the column, and having a space in which the controller is disposed, and a box provided on the box. The working machine with a cab according to claim 1, comprising a slide mechanism and a seat provided on the slide mechanism. 4. The box is provided with a harness drawing hole for drawing out the honey of the controller to the outside, and the harness drawing hole is provided with a seal member for sealing the space to the outside. Item 2
Or the working machine with a cab according to 3.