JPH11193548A - Upper slewing body of construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machinery capable of being firmly formed in a side deck within range of a slewinging circle in the width of an upper slewing body and utilizing a downward space of a step. SOLUTION: In this construction machinery, a part on the upper surface side of a side deck 12 as a strength constitution part is used for a step section 13 getting on and off a cap 18, and the step section 13 is continuously and narrowly formed from the side in the vicinity of the front of the cap 18 to the side in the vicinity of the rear of the cap 18. Batteries, etc., are arranged to the inside of the lower side deck 12 of the step section 13, and part of the step section 13 is used for an openable cover body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an upper revolving structure constituting a body of a construction machine such as a hydraulic shovel or a working vehicle.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing an ascending / descending step 7 of an embodiment of a retractable type described in Japanese Utility Model Laid-Open No. 4-130549. In the elevating step 7 shown in FIG. 8, an elevating step 7 having a substantially L-shaped cross section is rotatably attached to a lower position of the cab door 6 by a hinge mechanism 8. When it is closed, it is pivoted upward and retracted, and when it is fully opened, it interlocks with the opening operation of the cab door 6 so that it falls down and projects laterally.
In FIG. 8, reference numeral 1 denotes an upper revolving frame, 2 denotes a cab, and S1 denotes an interlocking mechanism.

[0003]

2. Description of the Related Art Conventionally, in construction machines and work vehicles such as hydraulic excavators, various types of retractable and stationary steps are taken into consideration as steps for getting on and off the cab of an upper revolving structure, and some of them are considered. Has been implemented. However, for example, a retractable step as shown in FIG. 6 has an operation mechanism for setting the step to a use state and a retracted state, but the structure becomes complicated and there is a problem in durability, operability, and the like. Also, the production cost was high, so it was bad. Also, when the retractable step is used, the upper revolving unit must necessarily protrude from the outer side surface of the side deck. Refrain from doing so, which can be very inconvenient. Some large shovels (or cranes), which are not shown, have been equipped with stationary steps, but the steps protrude considerably from the side sticks of the upper revolving structure to the side. Poor condition because of possible contact with obstacles. The present invention obtains a step that does not protrude laterally from the vehicle width of a lower traveling body, and makes it possible to obtain a mounting space for equipment, tools, and the like by using this step. Aims to provide body structure.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a construction machine in which an upper revolving structure is connected to a lower traveling structure such that the upper revolving structure has a width substantially within the vehicle width of the lower traveling structure. And a cab mounted above the side deck, wherein a step portion is formed between a side end of the side deck and a side end of the cab on an upper surface of the side deck.

[0005] According to this, since the upper surface side of the side deck, which is the main strength component of the upper revolving structure, is formed as a step portion, sufficient strength of the step portion can be ensured and the vehicle can be secured. Since the step portion is provided so as not to protrude from the side of the upper revolving structure accommodated in the width, the step portion is hardly damaged by contacting the step portion with an external obstacle, and it is easy to get into and out of the cab.

Further, the step portion is formed continuously from a side near the front surface of the cab to a side near the rear surface of the cab. As a result, the tread surface of the step portion can be sufficiently ensured, and getting on and off the cab can be more easily performed, and the load on the cab outer surface on which the step portion is provided or the upper revolving structure behind the cab can be provided. Maintenance work and the like can be easily performed.

Further, the step portion is formed to be narrow toward the front surface of the cab. According to this,
The narrow part allows the stepped part (or side deck) during turning to reduce the amount of the lower traveling body protruding from the vehicle width during turning, thereby improving work efficiency while preventing contact with obstacles at the stepped part. it can. Further, the rear end of the upper revolving structure can be turned substantially within the vehicle width of the lower traveling structure, and the narrow portion has a side shape substantially along the turning circle of the rear end of the upper revolving structure. It is not necessary to worry about contact with obstacles at the rear end of the upper revolving structure during turning work. Therefore, work efficiency can be further improved.

Further, a step portion is formed on the side deck at an intermediate height between the upper surface of the step portion and the lower surface of the side deck. According to this, even when the thickness of the side deck is large, getting on and off the driver's cab can be made easier. In addition, since the space in the side deck can be increased by increasing the thickness of the side deck, for example, it is easy to dispose devices in the side deck.

Further, in the case where a hydraulic switching valve, a battery and the like are arranged in the side deck below the step portion, the cab and other equipment do not exist above the step portion, so that the step portion can be easily formed. The part can be opened to perform maintenance on the hydraulic switching valve and the battery. When at least a part of the step portion is a lid that can be opened and closed, the maintainability can be further improved. In addition, when the inside of the side deck below the step portion is used as the tool mounting portion, tools can be easily taken in and out.

Further, when at least a part of the upper surface of the step portion is a slope having a downward slope toward the side end portion of the side deck, rainwater, mud and sand collected on the upper surface of the step portion are removed by the downhill. It can be easily dropped along a slight slope, so that the aesthetic appearance of the construction machine can be maintained, and the labor required for cleaning can be reduced.

Further, in the case where the fuel supply port of the fuel tank is arranged behind the cab, the fuel can be supplied in an easy working posture by using the step portion.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a main part showing an upper revolving structure 11 of an embodiment of a construction machine (a hydraulic excavator to be operated later) of the present invention, but a portion provided with a step portion 13 can be clearly identified. Has been hatched. In the drawing, reference numeral 18 denotes a cab for a driver's cab mounted on one side (left side in the drawing) of a front portion of the upper revolving unit 11, and 17 denotes a fuel supply port (fuel supply port for fuel) arranged behind the cab 18. ), 20 is a work attachment attached to the front portion of the upper revolving unit 11, and the radius R is the upper revolving unit 11 pivot center 0-0 (the side view pivot center 0-0 is shown later). This is the turning radius of the rear end of the body 11 up to the rear end (portion indicated by reference character C). FIG. 2 shows FIG.
13 is a plan view of an essential part showing an upper revolving unit 11 'provided with a step 13' (shown by hatching), which is a modification of the step 13 in FIG. In the figure, components using the same components as those shown in FIG. 1 are denoted by the same reference numerals.

FIG. 3 is a plan view of the hydraulic excavator 9 having the upper swing body 11 in FIG. In the figure,
Reference numeral 10 denotes a lower traveling body of the hydraulic excavator 9, 12 denotes a side deck on which a step portion 13 is formed as a side strength component of the upper revolving superstructure 11, and W denotes a vehicle width dimension of the lower traveling body 10. A circle indicated by a line A is a turning circle assuming a turning locus defined by a rear end turning radius R around the turning center 0-0 at the rear end C of the upper turning body 11. In the present embodiment, the diameter 2R of the turning circle a is set to 2R ≦ W. FIG. 4 is an enlarged view of the vicinity of the step portion 13 in FIG. 3, except for the hatching for clarifying the portion of the step portion 13 in FIG. In the figure, reference numeral 14 denotes a power supply battery disposed inside the side deck 12 and below the step portion 13, reference numeral 15 denotes a hydraulic switching valve such as a control valve which is one component of a hydraulic circuit, and reference numeral 21 denotes a portion of the step portion 13. 22 formed as a part and hinged to the upper side of the battery 14 (by the hinge member 21h),
Is formed as a part of the step portion 13 and is formed as a hydraulic switching valve 15
Is a lid hinged on the upper side (by the hinge member 22h).

FIG. 5 is a side view of the excavator 9 in FIG. In the figure, reference numeral 19 denotes a driver's entry / exit door provided on the cab 18 so as to be openable and closable, 16 denotes a fuel tank, and 0-0 denotes a turning center of the upper turning body 11 in a side view. FIG. 6 is an enlarged view of a portion A in FIG. FIG. 7 is a cross-sectional view of a main part taken along line BB of FIG.

Next, the structure and operation of the upper swing body 11 (including the upper swing body 11 'shown in FIG. 2) of the hydraulic excavator 9 according to one embodiment of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIGS. 1, 3 and 4, the side deck 1 which is one frame component on the side of the upper swing body 11 is used.
2 and a cab 18 mounted above the side deck 12. The side end of the side deck 12 on the upper surface of the side deck 12 (peripheral edge on the side surface indicated by reference numeral d) and the side of the cab 18 A step portion 13 is formed between the end portion (a side edge portion indicated by reference character E) and the step portion 13 is continuously formed from a side portion near the front surface of the cab 18 to a side portion near the rear surface of the cab 18. To be formed. Therefore, sufficient strength of the step portion 13 can be ensured, and it is easy to get on and off the cab 18 using the step portion 13 as a tread surface. Maintenance work and the like for the load on the upper swing body 11 can be easily performed.

Further, in the upper revolving unit 11 'shown in FIG. 2, the step portion 13' on the upper surface side of the side deck 12 ', which is a main strength component of the upper revolving unit 11', becomes narrower toward the front surface of the cab 18. And the rear end of the upper revolving structure 11 '(portion C) can be turned substantially within the vehicle width of the lower traveling structure (not shown in FIG. 2).
The narrow portion has a side shape substantially along a revolving circle at the rear end of the upper revolving structure 11 '(circle of an imaginary line in FIG. 2 with the reference character a). That is, since the step portion 13 ′ having a narrow front side is formed on the side deck 12 ′ that naturally fits within the vehicle width of the lower traveling body, it does not project laterally beyond the vehicle width. . Therefore, when the upper revolving unit 11 'turns, the step unit 13'
Can be prevented from being caught on other obstacles. Further, since the side end angle on the front side of the cab 18 can be close to the turning circle A, the arrangement of the cab 18 can be advantageously selected.

In this embodiment, as shown in FIGS. 4 to 7, a hydraulic switching valve 15, a battery 14, and the like are arranged in the side deck 12 below the step portion 13. Of these, the portion of the hydraulic switching valve 15 and the portion above the battery 14 are hinged as lids 21 and 22 which can be opened and closed, respectively. Therefore, when the hydraulic switching valve 15 is disposed below the step portion 13,
Since the cab 18 and other devices do not exist above the step portion 13, the lid 22 of the step portion 13 can be easily opened to perform maintenance of the hydraulic switching valve 15. Even when the battery 14 is disposed below the step portion 13, the hydraulic switching valve 15
In the same manner as when the cover 2 is disposed.
1 can be opened to ensure maintainability. Further, the fuel supply port 17 of the fuel tank 16 is disposed behind the cab 18. That is, when the fuel supply port 17 is disposed behind the cab 18, the fuel can be supplied in an easy working posture by using the step portion 13. In addition, at least a part of the upper surface of the step portion 13 is formed as a downwardly sloped surface (a surface in the direction of the arrow shown in FIG. 7) toward the side end of the side deck 12. Therefore, rainwater, muddy sand, and the like that accumulate on the upper surface of the step portion 13 can be easily dropped along the slight slope of the downward slope.

FIG. 8 is a view showing a hydraulic excavator according to another embodiment of the present invention. In the figures, components using the same components as those shown in FIGS. 1 to 7 are denoted by the same reference numerals. In the figure, 9 'is a hydraulic excavator, 11' is an upper revolving superstructure, 12 "is a side deck, 13 'is a step portion, 18' is a cab, 24 is a tool mounting portion arranged inside the side deck 12", Reference numeral 25 denotes a lid body which can open and close the upper part of the tool mounting portion so as to be openable and closable; 26, a step formed on a part of the step portion 13 '; 27, a head guard for protecting the upper surface of the cab 18' from falling objects; Is a fuel tank.

In the embodiment shown in FIG. 8, 2R> W, but this is within a range in which the rear end c of the upper revolving unit 11 ″ is unlikely to come into contact with an external obstacle or the like in actual work. (2R ≒ W) The operator (driver) is in the step section 13
The fuel can be supplied from the fuel supply port 17 provided on the upper surface of the fuel tank 28 in an easy posture from above, and the opening / closing operation of the head guard 27, the cab upper surface window (not shown, but the cab below the head guard 27). Stable working posture for cleaning the head guard 27, cleaning the head guard 27, cleaning and maintenance of other windows and exteriors of the cab 18 ', maintenance of equipment and exteriors within reach of the step 13'. Can be done with The tool mounting portion 24 is a space for storing on-vehicle tools (not shown), and the upper portion thereof can be freely opened and closed by a lid 25. The operator opens the lid 25 as necessary, takes out necessary tools and performs work and maintenance. However, since the tool mounting portion 24 is opened upward, the tools are stabilized. The cab 1 is placed on the step portion 13 '.
Since 8 'and other devices are not provided, it is easy to take it out.

The step portion 13 '(the side portion of the side deck 12 "constituting the step portion 13') is formed narrow toward the front surface of the cab 18 '.
In this case, the amount of the step 13 'coming out of the turning circle (virtual line A) during turning can be suppressed, and workability can be improved. Note that the cab 18 'and the step portion 13' (side deck 1
2 ") protrudes from the turning circle (virtual line a), but the hydraulic excavator 9 'of this embodiment aims at improving workability by minimizing the attention paid by the driver to the rear. Therefore, on the front side where the driver's attention is easy to pay attention, a slight protrusion from the turning circle (virtual line a) does not pose any problem in work.

The side deck 12 "includes the side deck 1
A step portion 26 is formed so as to enter into 2 ".
FIG. 9 is an enlarged side view of a main part viewed from the direction B in FIG.
It shows the positional relationship between the two. The stairs 26 allow the driver to use the upper surface of the lower traveling body 10, the stairs 26, and the step 13 'as a scaffold for getting on and off the cab. Especially if the excavator is large, side deck 1
2 "tends to be difficult to get on and off the cab because of its large thickness (height direction), but according to the present embodiment, it is easy to get on and off by the stairs. Assuming that the stairs are formed in the side deck 12 ", the thickness of the side deck 12" can be set without much consideration of the getting on and off, so that it is sufficient when arranging various devices in the side deck 12 ". Space can be obtained, and the tool mounting part 2
4 can be sufficiently obtained. Step 2
In the case where 6 is formed as a flat surface, if a non-slip member (not shown) is attached to the upper surface, getting on and off is safer. Further, if the side deck 12 "is vertically penetrated in the stairs 26, and a lattice-shaped or ladder-shaped tread surface member is provided in the penetrated opening, mud on the sole of the driver can be obtained. The side deck 1 is sure
2 "or dropped from the top of the stairs 26 so that mud is not brought into the cab, and a reliable anti-slip effect can be obtained even in rainy weather or the like.

[0022]

According to the first aspect of the present invention, since the upper portion of the side deck, which is the main strength component of the upper swing body, is formed as the step portion, sufficient strength of the step portion is ensured. And the step is provided so that it does not protrude from the side of the upper revolving structure housed in the vehicle width, making it difficult for the step to come into contact with external obstacles and to be damaged. Can be easier.

According to the second aspect of the present invention, the tread surface of the step portion can be sufficiently ensured, the getting on / off of the cab becomes easier, and the outer surface of the cab on the side where the step portion is provided or the cab is provided. Maintenance work and the like can be easily performed on the load on the rear upper swing body.

Further, according to the third aspect of the present invention, the step portion (or side deck) at the time of turning can be reduced by the narrow portion from the vehicle width of the lower traveling body at the time of turning. Work efficiency can be improved while preventing contact with obstacles.

According to the fourth aspect of the present invention, there is no need to worry about contact with the obstacle at the rear end of the upper revolving structure during the turning operation, and if the rear end is within a range in which the rear end can be turned, Since it is possible to prevent a trouble in which the step portion is caught on another obstacle, the work efficiency can be further improved.

Further, according to the fifth aspect of the present invention, even when the side deck has a large thickness, getting on and off the driver's cab can be more easily performed. The space in the side deck can be increased, and for example, it is also possible to arrange the devices in the side deck with a margin.

Further, according to the present invention, since the cab and other equipment do not exist above the step portion, the step portion is easily opened to open the hydraulic switching valve and the battery. Maintenance and access to tools can be performed.

Further, according to the ninth aspect of the present invention, the lid can be easily opened by opening and closing the lid, so that the maintenance property and the ease of taking out tools can be improved.

According to the tenth aspect of the present invention, rainwater, muddy sand and the like accumulated on the upper surface of the step portion can be easily dropped along the slight slope of the downward slope.
The aesthetic appearance of the construction machine can be maintained, and the labor required for cleaning can be reduced.

According to the eleventh aspect of the present invention, it is possible to perform refueling in a comfortable working posture by using the step portion.

[Brief description of the drawings]

FIG. 1 is a plan view of an essential part showing an upper revolving structure of an embodiment in a construction machine of the present invention.

FIG. 2 is a plan view of a main part of an upper revolving structure having a step portion according to a modified example of the present invention.

FIG. 3 is a plan view of a hydraulic excavator provided with the upper-part turning body in FIG. 1;

FIG. 4 is an enlarged view near a step portion in FIG. 3;

FIG. 5 is a side view of the excavator in FIG. 3;

FIG. 6 is an enlarged view of a portion A in FIG. 5;

FIG. 7 is a cross-sectional view of a main part taken along line BB of FIG. 6;

FIG. 8 is a plan view of a hydraulic shovel showing another embodiment.

FIG. 9 is an enlarged side view of a main part viewed from a direction C in FIG. 8;

FIG. 10 is a perspective view showing an ascending / descending step of a conventional retractable embodiment.

[Explanation of symbols]

 7 Step 6,19 Door (for driver's cab) 9,9 'Hydraulic excavator 10 Undercarriage 11,11', 11 "Upper revolving structure 12,12 ', 12" Side deck 13,13' Step 14 Battery 15 Hydraulic switching valve 16 Fuel tank 17 Filler port 18, 18 'Cab 21, 22, 25 Lid 24 Tool mounting section 26 Step section

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazutaka Yamachi 3-12-4 Gion, Asaminami-ku, Hiroshima-shi, Hiroshima

Claims (11)

[Claims] 1. A construction machine in which an upper revolving unit having a width substantially within the vehicle width of the lower traveling unit is connected to a lower traveling unit so as to be revolvable, a side deck constituting the upper revolving unit,
A cab mounted above the side deck,
An upper revolving structure for a construction machine, wherein a step portion is formed between a side end of the side deck on a top surface of the side deck and a side end of the cab. 2. The upper revolving structure of a construction machine according to claim 1, wherein the step portion is formed continuously from a side near a front surface of the cab to a side near a rear surface of the cab. 3. The upper revolving structure of a construction machine according to claim 1, wherein the step portion is formed narrower toward a front surface of the cab. 4. The rear end of the upper revolving structure is rotatable substantially within the vehicle width of the lower traveling structure, and the narrow portion has a side shape substantially along a turning circle of the rear end of the upper revolving structure. The revolving superstructure of a construction machine according to claim 3, wherein: 5. The side deck is provided with a step portion which is located at an intermediate height between the step portion and the lower surface of the side deck, and is opened to the side deck side end side and upper side. Item 5. An upper revolving structure for a construction machine according to any one of Items 1 to 4. 6. An upper revolving structure for a construction machine according to claim 1, wherein a hydraulic switching valve is disposed in a side deck below the step portion. 7. The upper revolving structure of a construction machine according to claim 1, wherein a battery is disposed in a side deck below the step portion. 8. The upper revolving structure of a construction machine according to claim 1, wherein a tool mounting portion is disposed in a side deck below the step portion. 9. An upper revolving structure for a construction machine according to claim 6, wherein at least a part of said step portion is a lid which can be opened and closed. 10. The construction machine according to claim 1, wherein at least a part of an upper surface of the step portion is a slope having a downward slope toward a side end of the side deck. Upper revolving superstructure. 11. The upper revolving structure of a construction machine according to claim 1, wherein a fuel supply port of a fuel tank is disposed behind the cab.