KR20160076123A - Upper frame of construction machinery - Google Patents

Abstract

An upper frame for construction machinery includes: a floor panel installed in a lower driving body to be rotatable to support a work device of construction machinery, and including a center joint combination part and a rotating device combination part; left and right side panels vertically extended from the floor panel to face each other by staying away from each other; and a reinforcement panel installed on the upper side of the floor panel between the center joint combination part and the rotating device combination part, and of which both sides are fixed to the left and right side panels, respectively. Therefore, the present invention is capable of maximizing working efficiency.

Description

BACKGROUND ART [0002] Upper frame of a construction machine

The present invention relates to an upper frame of a construction machine. More specifically, the present invention relates to an upper frame mounted on a lower traveling body of a construction machine so as to be pivotable.

A construction machine, for example an excavator, may include a lower running body and an upper revolving body. The lower traveling body can move the construction machine, and the upper turning body can perform excavation work or the like by using work devices such as boom, arm, and bucket. The upper revolving structure is supported by the upper frame, and can be rotated on the lower traveling structure by using the revolving device installed on the upper frame.

On the other hand, vibration may occur in the course of driving the swing device. The vibration is transmitted to the upper frame, and can be amplified by the resonance phenomenon in the upper frame. The amplified vibration is transmitted to the cabin and can act as noise to the driver.

An object of the present invention is to provide an upper frame of a construction machine capable of preventing noise generated in a turning device from being amplified.

According to an aspect of the present invention, an upper frame of a construction machine according to exemplary embodiments of the present invention is rotatably installed on a lower traveling body to support a working device of a construction machine, A left side plate and a right side plate spaced apart from each other so as to extend in a direction perpendicular to the bottom plate and spaced apart from each other, and a lower plate disposed on the upper surface of the bottom plate between the center joint fastening portion and the swing device fastening portion And a reinforcing plate having both side surfaces fixed to the left side plate and the right side plate, respectively.

In the exemplary embodiments, the reinforcing plate may include a body that extends in a direction perpendicular to the upper surface of the bottom plate and contacts the left side plate and the right side plate, respectively, and extends from the upper left side of the body to come in contact with the left side plate And a second protrusion extending from a right upper end of the body to be in contact with the right side plate.

In the exemplary embodiments, the body may be a recessed bottom left corner and a bottom right corner, respectively.

In exemplary embodiments, the upper frame of the construction machine may further include at least one guide portion for moving the reinforcing plate forward or backward of the bottom plate.

In the exemplary embodiments, the guide portion may include a first guide portion provided between the reinforcing plate and the left side plate, a second guide portion provided between the reinforcing plate and the right side plate, And at least one third guide portion provided between the plates.

In the exemplary embodiments, the guide portion may include a guide rail fixed to at least one of the bottom plate, the left side plate, and the right side plate, and a guide rail fixed to one side of the reinforcing plate, And may include moveable blocks along the rails.

In exemplary embodiments, the guide portion may further include a fixing member for fixing the block to the guide rail.

The upper frame of the construction machine according to the exemplary embodiments can prevent the vibration generated in the pivot device from being amplified by installing the reinforcing plate on the center frame. Thus, the noise inside the cabin can be reduced.

In addition, since the reinforcing plate can be moved by the guide rails, the interference between the parts can be minimized when the assembly and the hydraulic hose are fastened, thereby maximizing the working efficiency.

However, the effects of the present invention are not limited to the above-mentioned effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a side view showing a construction machine.
2 is a perspective view showing an upper frame of a construction machine according to exemplary embodiments;
Fig. 3 is a plan view showing the upper frame of the construction machine of Fig. 2;
4 is a front view showing the reinforcing plate of Fig.
FIG. 5A is a graph showing noise inside the cabin during the swing operation according to the comparative examples. FIG.
FIG. 5B is a graph showing the noise inside the cabin during the swing operation according to the embodiments.
6 is a perspective view illustrating an upper frame of a construction machine according to exemplary embodiments.
7 is a front view showing the reinforcing plate of Fig.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a side view showing a construction machine. 2 is a perspective view showing a center frame of a construction machine according to exemplary embodiments; Fig. 3 is a plan view showing the center frame of the construction machine of Fig. 2; 4 is a front view showing the reinforcing plate of Fig. FIG. 5A is a graph showing noise inside the cabin during the swing operation according to the comparative examples. FIG. FIG. 5B is a graph showing the noise inside the cabin during the swing operation according to the embodiments.

1 to 5B, the construction machine 10 may include an upper revolving body 20, a lower traveling body 30, and a cabin 40. For example, the construction machine may be an excavator.

The upper revolving structure 20 may include an upper frame 50, an engine, a boom, an arm, a bucket, various hydraulic cylinders, and a counterweight. The upper swing body 20 is mounted on the lower traveling body 30 and rotates in a plane parallel to the ground to set a working direction and operates the boom, the arm and the bucket by the hydraulic cylinder Can be performed. In this case, the balance of the construction machine 10 in operation can be maintained by using the counterweight.

The upper frame 50 is installed on the lower traveling body 30 and the engine or the like may be installed on the upper frame 50. Although not shown, the upper frame 50 may include a center frame, a left frame and a right frame respectively installed on both sides of the center frame. For example, a cabin 40 may be installed on the left frame, and a fuel tank and a hydraulic tank may be installed on the right frame. A swing device or the like is installed on the upper frame, and the boom can be connected.

The lower traveling body 30 supports the upper swing body 20 and the cabin 40 and can drive the construction machine 10 using the power generated from the engine. For example, the lower traveling body may be a crawler type or a wheel type.

The cabin 40 is installed in the upper revolving structure 20, and a driver can ride inside the cabin 40 to steer the construction machine 10. Various control devices for controlling the upper revolving body 20 and the lower traveling body 30 may be provided in the cabin 40.

In the exemplary embodiments, the upper revolving structure 20 of the construction machine 10 may include an upper frame 50. The upper frame 50 is mounted on the lower traveling body 30 and can be provided with working devices such as a cabin 50, an engine, a boom, etc., and a counter weight.

In the exemplary embodiments, the upper frame 50 of the construction machine includes a bottom plate 100, a left side plate 200 and a right side plate 300 respectively extending upward from the upper surface of the bottom plate 100, A connecting plate 400 connecting the left side plate 200 and the right side plate 300 and a reinforcing plate 500 installed between the left side plate 200 and the right side plate 300 on the top surface of the bottom plate 100 .

The bottom plate 100 may include a center joint fastening portion 110 and a swing device fastening portion 120.

The center joint fastening part 110 and the swing device fastening part 120 may be formed on the bottom plate 100 to penetrate the bottom plate 100. A center joint (not shown) is installed in the center joint fastening part 110, and the center joint can supply hydraulic oil from the upper revolving body 20 to the lower traveling body 30. [ A swing device (not shown) may be installed in the swing device fastening part 120. The pivoting device may include a pivoting motor (not shown) for pivoting the upper pivoting body 20 on the lower pivoting body 30.

The left side plate 200 and the right side plate 300 may be spaced apart from each other on the top surface of the bottom plate 100. [ For example, the left side plate and the right side plate may extend in the vertical direction from the upper surface of the bottom plate, respectively. One ends of the left side plate 200 and the right side plate 300 may be connected to each other by a connecting plate 400.

The reinforcing plate 500 may be installed on the upper surface of the bottom plate 100 between the center joint fastening portion 110 and the swing device fastening portion 120. For example, the reinforcing plate may be fixed in a direction perpendicular to the bottom plate. The left side surface of the reinforcing plate 500 may be in contact with the left side plate 200 and the right side surface may be in contact with the right side plate 300. [ The reinforcing plate 500 may be fixedly installed between the left side plate 200 and the right side plate 300. For example, the reinforcing plate may be fixed to the left side plate and the right side plate in directions perpendicular to each other.

In an exemplary embodiment, the gusset 500 includes a body 510, a first protrusion 520 extending from the upper left of the body 510, and a second protrusion 520 extending from the upper right of the body 510 522).

The body 510 may be installed on the upper surface of the bottom plate 100 between the left side plate 200 and the right side plate 300. The bottom surface of the body 510 contacts the top surface of the bottom plate 100 and the left side surface contacts the left side plate 200 and the right side surface can contact the right side plate 300. [

In the exemplary embodiments, the body 510 may further include first and second recesses 530 and 532 recessed in the bottom edge. The first recess 530 may be located at the lower left of the body 510 and the second recess 532 may be located at the lower right of the body 510.

For example, the first and second recesses may be bypass passages for allowing the hydraulic hoses to bypass the reinforcing plate. A plurality of hydraulic hoses for supplying hydraulic pressure to the respective parts of the construction machine 10 may be installed in the upper frame 50. The reinforcing plate 500 may be completely in contact with the bottom plate 100, the left side plate 200 and the right side plate 300 to divide the upper portion of the bottom plate 100. In this case, the first and second recesses 530 and 532 may be provided between the front and rear surfaces of the reinforcing plate 500 to provide a passage for the hydraulic hoses to bypass the reinforcing plate 500.

The first protrusion 520 may protrude from the upper left of the body 510 and protrude above the upper surface of the body 510. The left side surface of the first protrusion 520 can contact the left side plate 200. For example, the first projection may have a trapezoidal shape.

The second protrusion 522 may extend from the right upper end of the body 510 and protrude above the upper surface of the body 510. The right side surface of the second projection 522 can contact the right side plate 300. [ For example, the second projection may have a trapezoidal shape.

As shown in FIGS. 5A and 5B, the reinforcing plate 500 can reduce the noise transmitted to the inside of the cabin 40 during the turning operation of the construction machine 10. FIG.

The upper frame 50 may be installed on the lower traveling body 30 and the pivoting device may be installed on the upper frame 50. The pivoting device is installed on the swing device coupling part 120 of the upper frame 50 and can rotate the upper frame 50 on the lower traveling body 30. [

Noise may be generated in the course of driving the pivoting device. The noise can be transmitted to the inside of the cabin 40 through the upper frame 50. At this time, the noise can be amplified by the resonance phenomenon in the upper frame 50. For example, as shown in FIG. 5A, noise in a specific frequency range may be amplified in the upper frame and transmitted into the cabin. In this case, the specific frequency range may vary depending on the size of the construction machine and the thickness of the bottom plate 100 and the side plates 200 and 300 forming the upper frame 50.

In contrast, as shown in FIG. 5B, by installing the reinforcing plate 500 on the upper frame 50, the noise transmitted from the pivoting device to the cabin 40 can be reduced. The reinforcing plate 500 can prevent the noise generated from the pivoting device from being amplified in the upper frame 50. In this case, the size and thickness of the reinforcing plate 500 and the like can be variously selected depending on the desired frequency range.

As described above, the upper frame 50 of the construction machine according to the exemplary embodiments may further include a reinforcing plate 500 installed on the bottom plate 100. The reinforcing plate 500 can prevent the noise components generated in the pivoting device from being amplified in the upper frame 50. Thus, the noise inside the cabin 40 can be reduced.

6 is a perspective view illustrating an upper frame of a construction machine according to exemplary embodiments. 7 is a front view showing the reinforcing plate of Fig. The upper frame of the construction machine is substantially the same as or similar to the upper frame of the construction machine described with reference to Figs. 2 to 4 except for the first to fourth guard portions. Accordingly, the same reference numerals are denoted for the same constituent elements, and repetitive explanations for the same constituent elements are omitted.

6 and 7, in the exemplary embodiments, the upper frame 52 of the construction machine includes a bottom plate 100, a left side plate (not shown) extending in the vertical direction from the upper surface of the bottom plate 100 A connection plate 400 connecting the right side plate 300 and the right side plate 300 and the left side plate 200 and the right side plate 300 and a connection plate 400 connecting between the left side plate 200 and the right side plate 300 on the top surface of the bottom plate 100, A first guide portion 540 provided between the reinforcing plate 502 and the left side plate 200 and a second guide portion 540 provided between the reinforcing plate 502 and the right side plate 300. [ And the third and fourth guide portions 560 and 570 installed between the reinforcing plate 502 and the bottom plate 100. [

In the exemplary embodiments, the first guide portion 540 includes a first block 542 fixed to one side of the reinforcing plate 502, a first block 542 fixed on the side of the left side plate 200, A first guide rail 544 for guiding the first block 542 and a first fixing member 546 for fixing the first block 542 to the first guide rail 544.

The first guide rail 544 may extend parallel to the upper surface of the bottom plate 100 in front of or behind the upper frame 52. The first block 542 can move forward or backward of the upper frame 52 along the first guide rail 544 by grasping the first guide rail 544. For example, the first block and the first guide rail may be an LM guide (Linear Motion Guide).

The first fixing member 546 can fix the first block 542 to the first guide rail 544. [ For example, the first fixing member may be a bolt. When the first block 542 is fixed to the first guide rail 544 using the first fixing member 546, the first block 542 is no longer moved along the first guide rail 544 to the upper frame 52 Quot;). ≪ / RTI > Accordingly, the reinforcing plate 502 can be fixed on the bottom plate 100.

The second guide unit 550 includes a second block 552 fixed to one side of the reinforcing plate 502 and a second guide rail fixed on the side surface of the right side plate 300 and guiding the second block 552 And a second fixing member 556 for fixing the second block 552 to the second guide rail 554. [

The second guide rail 554 may extend parallel to the upper surface of the bottom plate 100 in front of or behind the upper frame 52. The second block 552 can move forward or backward of the upper frame 52 along the second guide rail 554 by grasping the second guide rail 554. For example, the second block and the second guide rail may be an LM guide.

The second fixing member 556 may fix the second block 552 to the second guide rail 554. [ For example, the second fixing member may be a bolt. When the second block 552 is fixed to the second guide rail 554 using the second fixing member 556, the second block 552 is no longer moved along the second guide rail 554 to the upper frame 52 Quot;). ≪ / RTI > Accordingly, the reinforcing plate 502 can be fixed on the bottom plate 100.

In FIGS. 6 and 7, one guide portion 540 and 550 are provided on both sides of the reinforcing plate 502, but the number of the guide portions is not limited thereto. Therefore, more guide parts can be provided between the reinforcing plate 502 and the left side plate 200 or between the reinforcing plate 502 and the right side plate 300 as needed.

The third and fourth guide portions 560 and 570 may be installed between the reinforcing plate 502 and the bottom plate 100, respectively. The third guide portion 560 may include a third block 562, a third guide rail 564 and a third fixing member 566. The fourth guide portion 570 may include a fourth block 572, A fourth guide rail 574, and a fourth fixing member 576, as shown in FIG. For example, the third and fourth guide portions may be LM guides, and the third and fourth fixing members may be bolts.

6 and 7, two guide portions 560 and 570 are provided between the reinforcing plate 502 and the bottom plate 100. However, the number of the guide portions is not limited thereto. Therefore, only one guide portion may be provided between the reinforcing plate 502 and the bottom plate 100, and in some cases, three or more guide portions may be provided.

The reinforcing plate 502 can be moved forward or backward of the upper frame 52 from the upper portion of the bottom plate 100 by the first to fourth guide portions 540, 550, 560, 570. Accordingly, it is possible to minimize the interference by the reinforcing plate 502 when installing the swing device and various hydraulic hoses. When the swing device and the hydraulic hoses are installed, the reinforcing plate 502 can be moved between the center joint fastening part 110 and the swing device fastening part 120. The first to fourth fixing members 546, 556, 566 and 576 are arranged such that the first to fourth blocks 542, 552, 562 and 572 are connected to the first to fourth guide rails 544, 554, 564, 574, the position of the reinforcing plate 502 can be fixed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. It can be understood that it is possible.

10: Construction machine 20: Upper revolving body
30: Lower traveling body 40: Cabin
50, 52: upper frame 100: bottom plate
110: center joint fastening part 120: swing device fastening part
200: left side plate 300: right side plate
400: connecting plate 500, 502: reinforcing plate
510: body 520: first protrusion
522: second projecting portion 530: first concave portion
532: second concave portion 540: first guide portion
542: first block 544: first guide rail
546: first fixing member 550: second guide portion
552: second block 554: second guide rail
556: second fixing member 560: third guide part
562: third block 564: third guide rail
566: third fixing member 570: fourth guide portion
572: fourth block 574: fourth guide rail
576: fourth fixing member

Claims (7)

A bottom plate rotatably installed on the lower traveling body to support a working device of the construction machine and having a center joint fastening portion and a swing device fastening portion;
A left side plate and a right side plate spaced apart from each other in a direction perpendicular to the bottom plate and opposing each other; And
And a reinforcing plate provided on an upper surface of the bottom plate between the center joint fastening portion and the swing device fastening portion and having opposite side surfaces fixed to the left side plate and the right side plate, respectively. The stiffener according to claim 1,
A body extending in a direction perpendicular to an upper surface of the bottom plate, the body contacting the left side plate and the right side plate, respectively;
A first protrusion extending from a left upper end of the body so as to contact the left side plate; And
And a second protrusion extending from a right upper end of the body so as to contact the right side plate. The upper frame as claimed in claim 2, wherein the lower left corner and the lower right corner of the body are recessed. The upper frame of the construction machine according to claim 1, further comprising at least one guide portion for moving the reinforcing plate forward or rearward of the bottom plate. 5. The apparatus according to claim 4,
A first guide portion provided between the reinforcing plate and the left side plate;
A second guide portion provided between the reinforcing plate and the right side plate; And
Further comprising at least one third guide portion provided between the reinforcing plate and the bottom plate. 5. The apparatus according to claim 4,
A guide rail fixed to at least one of the bottom plate, the left side plate, and the right side plate; And
And a block fixed to one side of the reinforcing plate and capable of moving along the guide rail by grasping the guide rail. The upper frame as claimed in claim 6, wherein the guide portion further comprises a fixing member for fixing the block to the guide rail.

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