JP2002242229A - Operator's cab installation structure for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge the vertical indoor space of an operator's cab without increasing the whole height of a construction machine specified by the roof of the operator's cab and without lowering the lower face of a revolving frame fitted with the operator's cab. SOLUTION: The operator's cab is installed, with its side face fitted to the revolving frame of the construction machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver's cab installation structure for a construction machine, and more particularly, to a driver's cab installation structure that can increase the vertical space in a driver's cab.

[0002]

2. Description of the Related Art Referring to FIG. 7, a hydraulic excavator 2, which is a typical construction machine, includes a lower traveling body 4 and an upper revolving body mounted on the lower traveling body 4 so as to be pivotable in a horizontal direction. And a driver's cab 50 is installed on the left front portion of the swing frame 52 of the upper swing body 6.

Referring to FIGS. 8 and 9 together with FIG. 7, the installation portion of the cab 50 will be described. Revolving frame 5
The driver's cab 2 includes a main frame 54 at a central portion which is formed in a substantially rectangular shape in a plan view and extends in the longitudinal direction, a skirt plate 56 at a left outer edge, and a plurality of cross beams 58 connecting the both. Is a plurality of cross beams 58
And the floor 51 is mounted on it. The cross beam 58 is formed in an angle having a height of a dimension C or a channel in order to secure rigidity.

[0004]

The above-mentioned conventional construction machine cab installation structure of the construction machine has the following problems to be solved.

[0005] In order to improve the livability of the driver's cab 50, it is desired to increase the height h in the vertical direction to widen the interior space. However, the operator's cab 50 has a limit as a height limit at the time of transportation, operation, and the like as the construction machine as a construction machine defined by the dimension A from the ground G to the roof in the height direction. The dimension B from the ground G to the lower surface of the turning frame 52 is determined by the structure of the construction machine such as the undercarriage 4. Therefore, in the construction machine in which the cab 50 is installed on the revolving frame 52, the height h of the cab cannot be made larger than the current level, and the vertical interior space cannot be enlarged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem of the present invention is to provide a swivel in which the cab is mounted without increasing the overall height of the construction machine defined by the roof of the cab. It is an object of the present invention to provide an operator's cab installation structure for a construction machine, in which a vertical interior space of an operator's cab can be increased without lowering a lower surface of a frame.

[0007]

According to a first aspect of the present invention, a driver's cab is mounted on a turning frame which is mounted on a traveling body so as to be capable of turning horizontally in a horizontal direction. A cab installation structure for a construction machine.

[0008] By mounting the side, not the bottom of the cab, on the turning frame, the cab installation portion of the slewing frame conventionally provided for mounting the cab is eliminated or simplified, and the bottom of the cab is changed to the bottom of the slewing frame. It is lowered so that the space in the vertical direction of the cab can be enlarged accordingly.

According to a second aspect of the present invention, in the cab installation structure for a construction machine according to the first aspect, the turning frame has a mounting surface extending in a substantially vertical direction for mounting a side surface of the cab. It is equipped.

The side surface of the cab is reliably supported by the vertically extending mounting surface provided on the body frame.

According to a third aspect of the present invention, in the cab installation structure for a construction machine according to the first or second aspect, a side surface of the cab attached to the turning frame forms a floor surface of the cab. It is formed integrally with the floor member.

[0012] By supporting the floor member, which is the base of the cab, on the revolving frame, the cab is reliably supported.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a construction cab installation structure of a construction machine according to the present invention. This will be described in detail.

Referring to FIGS. 1 and 2, a hydraulic excavator, generally designated by the reference numeral 2, is mounted on a lower traveling body 4 so as to be pivotable about an axis 5 in a horizontal direction on the lower traveling body 4. And an upper revolving superstructure 6. The revolving frame 8 of the upper revolving unit 6 has a working device 10 on the front side (left side in FIG. 1), a driver's cab 12 on the left side (front side in a direction perpendicular to the paper surface in FIG. 1), and a rear side. An engine room 14 is provided on the right side in FIG.
The cab 12 is formed in a substantially rectangular parallelepiped shape, and
The rear side surface 20 and the right side surface 22 are attached to the attachment surfaces 16 and 18 provided in the first embodiment.

Referring to FIG. 3 together with FIGS. 1 and 2, the cab 12 includes a body integrally formed by joining steel members to each other, and a plurality of openable / closable or fitted glass. It has a window and an entry / exit door 24, and its configuration is basically the same as the above-mentioned conventional cab 50 (FIG. 7). As compared with the cab 50, the cab 12 has a rear member 28 and a side member 30 forming the rear side surface 20 and the right side surface 22 for the above-described attachment to a floor member 26 forming the floor surface. The difference is that the lower member 32 is provided, and that the vertical dimension H (FIG. 1) is large. Therefore, these points will be described below.

The floor member 26, the rear member 28, and the side member 30, which form the lower member 32, are formed of a steel plate that is thicker than the plate member that forms the panel and the like of the cab 12. The floor member 26 has a rectangular shape, and a rectangular rear surface member 28 having the same width is provided at the rear end in the longitudinal direction, and a triangular shape is formed between the rear member 28 and the right edge over substantially the entire length of the floor member 26. The side members 30 are each provided upright in a direction perpendicular to the floor member 26. A substantially middle position of the left edge of the floor member 26 and the rear member 2
8 and a triangular reinforcing member 3 formed of a thick steel plate.
4 are joined. Various openings, holes, and the like for providing a driver's seat, a control device, and the like are formed in the floor member 26. The floor member 26 may have substantially the same shape as the floor plate provided in the conventional operator's cab 50, but is not provided because there is no need for a mounting hole for installation on the revolving frame. The rear surface member 28 is provided with mounting bolt holes 28a, 28b, 28c, 28d at four corners of the rectangular shape, and is formed with various openings for piping and the like. Side member 3
At 0, a mounting bolt hole 30a is provided at an end opposite to the end joined to the rear surface member 28, and an opening for piping or the like is formed. The lower member 32 may be formed by integrally bending the floor member 26, the rear member 28, the side member 30, and the reinforcing member 34.

Referring to FIG. 4 together with FIGS. 1 and 2, the turning frame 8 will be described. The revolving frame 8 is formed by joining steel members to each other, and is basically the same as the above-described conventional revolving frame 52 (FIG. 8) except that a portion for installing the cab 12 is different. That is, the driver cab 1 is formed in a rectangular shape in plan view, and
2 is provided with a rectangular space 8a.
Therefore, the different parts will be mainly described below. The revolving frame 8 includes a main frame 36 that extends in the longitudinal direction in the center and stands upright in the vertical direction, and a skirt plate 38 that extends from the rear end of the left outer edge to the substantially central portion.
The main frame 36 and the skirt plate 38
A rectangular horizontal frame 40 formed of a thick plate is provided upright in the vertical direction. The lower member 32 of the cab 12 is mounted on the horizontal frame 40 and the main frame 36. The driver's cab 1
Similarly to the rear member 28, mounting bolt holes 40a, 40b, 40c, and 40d are formed at four corners of the rectangular shape, and various openings for piping and the like are formed. In the main frame 36, mounting bolt holes 36a are formed at positions corresponding to the side members 30, and openings for piping and the like are formed.

Referring to FIG. 5, mounting bolt holes 28a, 28 provided in the lower member 32 of the cab 12 will be described.
c, 28b, 28d and 30a and mounting bolt holes 40a, 40c, 40b and 40d provided in the turning frame 8
And 36a are the cab 1 when they are aligned.
2, the lower surface of the floor member 26 is positioned so as to be higher than the lower surface of the revolving frame 8 by the dimension D. A detachable cover 42 is attached to a portion having the dimension D below the floor member 26, and a space for piping, a harness, and the like is formed.

In the cab 12 and the turning frame 8 configured as described above, five mounting bolt holes provided respectively are aligned, and as shown in FIG. 6, the mounting surface 16 and the rear side surface 20, A mount rubber 46 for vibration proof and vibration control is interposed between the mounting surface 18 and the right side surface 22.
And the driver's cab 12 is installed on the turning frame 8.

The operation of the construction cab installation structure of the construction machine as described above will be described.

(1) Increasing the cabin space in the cab: In contrast to the conventional cab installation structure in which the bottom surface of the cab is mounted on the upper surface of the revolving frame, the side surface of the cab extends vertically formed on the revolving frame. 1, the swivel frame below the cab on which the conventional cab is mounted can be eliminated or simplified, the bottom surface of the cab can be lowered accordingly, and the height H of the cab 12 (FIG. 1) ) To the conventional cab 50
(FIG. 7). That is, H + D = h + C, and the dimension D can be made small because it can be a space for passing pipes, harnesses, and the like, and C> D, so that H> h. Therefore, the total height A of the construction machine
The height H, which is the size of the driver's cab, can be made larger than the dimension h of the conventional driver's cab without changing the functional dimensions such as the dimension B from the ground G to the turning frame. Space can be expanded.

(2) Reliable and firm mounting: In addition, the cab 1
Rear member 28 and side member 3 forming side surface for attachment 2
Since 0 is integrally formed with the floor member 26 which is a base supporting the cab itself, the cab of the construction machine to which severe vibration, impact, and the like is applied can be firmly and reliably attached to the turning frame.

(3) Ease of getting on and off: Further, since the dimension D (FIG. 1) at the lower part of the cab is smaller than the conventional dimension C (FIG. 6), the distance from the ground G to the door 24 of the cab 12 is reduced. The height is reduced, making it easy to ascend and descend to the cab.

(4) Suitable for construction machines where the total height is limited:
For construction equipment with a limited total height used for tunnel construction, underground construction, etc., it was necessary to lower the roof of the operator's cab in order to reduce the total height, and sacrifice the interior space. According to the structure, a suitable cabin space can be prepared for construction machines for these uses.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments. It can be changed or modified.

(1) The side of the cab and the mounting surface of the revolving frame: In this embodiment, the side 2 of the cab 12
The mounting surfaces 16, 18 of the pivot frame 8, 0 and 22, are arranged vertically, but these surfaces are substantially vertical inclined surfaces extending obliquely upward according to the shape of the cab. Is also good.

(2) The side surfaces of the cab and the mounting surfaces of the turning frame: In this embodiment, the side surfaces 20 and 22 of the cab 12 and the mounting surfaces 16 and 18 of the turning frame 8.
Is formed in a plane, but when the cab has an arc-shaped side surface, the side surface and the mounting surface for installing the cab may be formed in an arc-shaped curved surface.

(3) Side of cab: In this embodiment, the sides 20, 22 of the cab 12 are formed as members integrally attached to the bottom plate 26. It may be formed separately on a panel forming the side surface of the cab.

[0029]

According to the cab installation structure of the construction machine constructed according to the present invention, the turning of the cab can be performed without increasing the overall height of the construction machine defined by the roof of the cab. There is provided an operator's cab installation structure for a construction machine, in which the vertical interior space of the operator's cab can be increased without lowering the lower surface of the frame.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel, which is a typical construction machine having a cab installation structure configured according to the present invention.

FIG. 2 is a perspective view showing a mounting state of a turning frame and a cab of the hydraulic excavator shown in FIG. 1;

FIG. 3 is a perspective view of a lower member of the cab shown in FIG. 2;

FIG. 4 is a perspective view of the turning frame shown in FIG. 2;

FIG. 5 is a sectional view as seen in the direction of arrows XX in FIG. 2;

FIG. 6 is an enlarged view of a portion indicated by Y in FIG.

FIG. 7 is a side view of a conventional hydraulic shovel having a cab installation structure.

FIG. 8 is a perspective view of a turning frame of the excavator shown in FIG. 7;

FIG. 9 is a cross-sectional view as viewed in the direction of arrows ZZ in FIG. 8;

[Explanation of symbols]

 2: Hydraulic excavator (construction machine) 4: Lower traveling body 8: Revolving frame 12: Driving cab 16: Mounting surface 18: Mounting surface 20: Side surface 22: Side surface 26: Floor member 50: Driver room 52: Revolving frame

Continued on the front page (72) Inventor Kunitomo Shimizu 4-10-1, Yoga, Setagaya-ku, Tokyo New Caterpillar Mitsubishi Corporation (72) Inventor Akitoshi Nishikawa 4-1-1, Yoga, Setagaya-ku, Tokyo Yatapillar Mitsubishi Corporation F-term (reference) 2D015 EA02

Claims (3)

[Claims] 1. A driver's cab installation structure for a construction machine, wherein a driver's cab is mounted on a revolving frame mounted on a traveling body so as to be freely rotatable in a horizontal direction. 2. The cab installation structure for a construction machine according to claim 1, wherein said revolving frame has a substantially vertically extending mounting surface for mounting a side surface of said cab. 3. The cab installation of a construction machine according to claim 1, wherein a side surface of the cab attached to the turning frame is formed integrally with a floor member forming a floor surface of the cab. Construction.