KR20220012712A - Muffler for construction machinery - Google Patents

Abstract

Disclosed is a muffler for a construction machine. The muffler for a construction machine according to an embodiment of the present invention includes a reinforcing plate (100) provided with a plate-shaped support (110) that communicates with a muffler (50), is coupled to the outside of a connection pipe (102) through which an exhaust gas generated from an engine (10) is introduced, and is in close contact with the muffler (50). By changing a structure of the reinforcing plate welded to the outside of the muffler, the resistance to vibration is improved.

Description

Muffler for construction machinery

The present invention relates to a reinforcing plate coupled to a connecting pipe of a muffler provided in heavy construction equipment such as an excavator, and more particularly, to a muffler for a construction machine.

In general, heavy construction equipment such as an excavator is a construction machine used to mine earth and rocks, and in particular, the excavator is a housing site development project, road and sewer construction, river remodeling and repair work, tunnel and subway construction, earth and stone collection work, It is manufactured to perform various works such as forest clearing work and soil loading work.

For example, it is possible to perform complex work such as excavating and dumping using a bucket according to working conditions, and installing a breaker at the position of the bucket, such as rock excavation, building destruction work, and construction waste collection work.

1, the conventional excavator is provided with an engine (not shown) for operating the undercarriage, and is provided with a muffler 20 spaced apart from the engine. An exhaust pipe (not shown) connected at both ends between the engine and the muffler 20 is provided.

The muffler 20 is a device for attenuating exhaust noise by lowering the temperature and pressure of exhaust gas discharged from the engine, and is provided with a connection pipe 22 extending outwardly by a predetermined length to be connected to the exhaust pipe.

Since the connection pipe 22 protrudes to the outside of the muffler 20, it must be designed to have a structure that can withstand vibrations generated from the engine, vibrations generated from equipment, and external shocks.

The conventional connection pipe 22 is simply designed to be installed on the outside of the muffler 20 so that the portion connected to the muffler 20 has a curved surface having a predetermined curvature, so that the support structure with the muffler 20 is maintained.

However, when the connection pipe 22 is installed in this way, structural safety is not secured when used for a long period of time, and problems due to deformation and crack generation are induced, and countermeasures are required.

Republic of Korea Public Utility Model No. 20-2000-0000160

Embodiments of the present invention are to improve the resistance to vibration by changing the structure of the reinforcing plate welded to the outside of the muffler, and to provide a muffler for construction machinery that can be produced simply by cutting after cutting for ease of manufacture.

A muffler for a construction machine according to an embodiment of the present invention includes a muffler 50; a connection pipe 102 communicating with the muffler 50 and introducing exhaust gas generated from the engine 10; and a reinforcing plate 100 provided with a plate-shaped support 110 coupled to the outside of the connection pipe to be in close contact with the muffler 50 .

The support part 110 includes a plate-shaped first support part 112 in which an insertion hole 112a is opened so that the connection pipe 102 is inserted.

The support part 110 is formed integrally with the first support part 112 and connects between the second support parts 114 in the form of a plate bent at a predetermined angle toward the muffler 50 from the upper front side. 1 support rib (110a); Between the first support part 112 and the third support part 116 in the form of a plate extending integrally with the first support part 112 and bent at a predetermined angle toward the muffler 50 from the lower front side It further includes a second support rib (110b) for connecting.

The support part 110 may include a first support rib 110a connecting the first support part 112 and the second support part 114; It further includes a second support rib (110b) connecting between the first support (112) and the third support (116).

The second to third supports 114 and 116 are respectively bent at the same angle.

Concave-convex portions 114a and 116a are formed at the ends bent toward the muffler 50 in the second to third support portions 114 and 116 , respectively.

The concave-convex portions 114a and 116a are repeatedly formed inward and outward along the width direction of the second to third support portions 114 and 116 .

The first support part 112 has a partial opening in a predetermined length from the inner circumferential direction of the insertion hole 112a toward the outside in the radial direction so that the insertion hole 112a is formed in a radial direction according to the diameter of the connection pipe 102 . It further includes an extension (112b) provided to be expandable outward.

The second to third supporting parts 114 and 116 are formed with round parts 114b and 116b each of which ends extending toward the muffler 50 are wound to be rounded inward.

In the embodiments of the present invention, the stability of coupling with the muffler is improved along with stable fixing of the muffler to the connection pipe, and structural stability due to vibration and shock transmitted from the outside is improved.

In the embodiments of the present invention, structural stability is improved during long-term use by changing the coupling structure of the reinforcing plate welded to the outside of the muffler so that stress is diffused and supported by the reinforcing plate.

Embodiments of the present invention simplify the manufacturing and installation of the reinforcing plate, so that an expensive curved mold is not required, thereby reducing the cost for manufacturing and simplifying the installation operation, thereby improving the work efficiency of the operator.

1 is a perspective view showing a muffler and a connection pipe provided in a conventional excavator.
Figure 2 is a perspective view showing an excavator provided with a reinforcing plate according to an embodiment of the present invention.
3 is a perspective view illustrating a state in which a muffler for a construction machine according to an embodiment of the present invention is installed on the muffler.
Figure 4 is a perspective view showing a muffler for a construction machine according to an embodiment of the present invention.
5 is a perspective view illustrating a state in which a reinforcing plate according to another embodiment of the present invention is installed on a muffler.
6 is a view showing a reinforcing plate formed with a concave-convex portion according to an embodiment of the present invention;
7 is a view showing a reinforcing plate formed with an expanded portion according to an embodiment of the present invention;
8 is a view showing a reinforcing plate formed with a round part according to an embodiment of the present invention;

Various changes can be made according to an embodiment of the present invention, and various embodiments can be made, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

A muffler for a construction machine according to an embodiment of the present invention will be described with reference to the drawings. 2 is a perspective view showing an excavator equipped with a reinforcing plate according to an embodiment of the present invention, and FIG. 3 is a perspective view showing a state in which the muffler for construction machinery according to an embodiment of the present invention is installed on the muffler, 4 is a perspective view illustrating a muffler for a construction machine according to an embodiment of the present invention, and FIG. 5 is a perspective view illustrating a state in which a reinforcing plate according to another embodiment of the present invention is installed on the muffler.

Prior to a description of a muffler for a construction machine according to an embodiment, an excavator equipped with the reinforcing plate will be described.

2 to 5, in the excavator, an upper rotating body 2 having a cab with respect to the lower traveling body 1 is rotatably mounted in both left and right directions, and the upper rotating body 2 ) The boom (3) operated by the drive of the boom cylinder (4) connected to one side is mounted.

The boom 3 is made of steel and extends to a predetermined length toward the front of the cab as shown in the drawing, and an arm 6 is connected to the extended end of the boom 3, and the arm ( An arm cylinder 5 is provided for the operation of 6).

And the arm 6 extends to a predetermined length, a bucket cylinder 7 is provided on the upper side, and a bucket 9 is located at the end of the lever 8 through which a mechanical link movement is made by the bucket cylinder 7 . this is installed

The bucket 9 has a bucket tooth installed at an end thereof, and the bucket tooth protrudes to the outside of the bucket 9, so that the operation can be performed more easily than when performing various excavation operations.

The muffler for a construction machine according to this embodiment is coupled to the outside of the muffler 50 and the connection pipe 102 communicating with the muffler 50 and introducing the exhaust gas generated from the engine 10 to the muffler 50 . A reinforcing plate 100 provided with a plate-shaped support 110 in close contact with the ?

Since the reinforcing plate 100 according to the present embodiment is formed in a plate shape rather than a curved shape, a mold or rounding operation for manufacturing a curved shape is unnecessary, thereby simplifying the manufacturing process itself. In addition, when the operator welds the support part 110 to the outside of the muffler 50, the installation is terminated, so that the installation can be performed quickly, thereby improving work efficiency.

The support part 110 according to this embodiment is formed to extend integrally with the first support part 112 in the form of a plate in which the insertion hole 112a is opened so that the connection pipe 102 is inserted, and the first support part 112, and , the second support part 114 in the form of a plate bent at a predetermined angle toward the muffler 50 from the upper front side, and the first support part 112 are integrally formed to extend, and the muffler 50 from the lower front side It includes a third support 116 in the form of a plate bent at a predetermined angle toward the.

The support 110 is formed in the form of a plate in which the second support 114 is bent upward with respect to the first support 112 and the third support 116 is bent downward, so it has the shape and length shown in the drawing. In case of bending after cutting, the operation can be carried out easily and productivity is improved.

The first support 112 has an insertion hole 112a into which the connection pipe 102 is inserted, and is easily processed through cutting and punching through a press machine.

The first support part 112 has a size in which the connection pipe 102 can be inserted, and is formed in the size shown in the drawings in consideration of the stress applied to the insertion hole 112a.

The support part 110 has the same length spaced apart in the vertical direction (vertical direction) or left and right direction (horizontal direction) in which the second support part 114 and the third support part 114 extend based on the insertion hole 112a. or they may be extended similarly to each other.

In particular, since the support 110 does not need to be manufactured to have a longer length extending in either the vertical direction or the horizontal direction, material loss due to manufacturing can be minimized, thereby reducing costs.

Since the second to third support parts 114 and 116 are bent at a predetermined angle from the first support part 112 toward the muffler 50 and then extend, even when stress is concentrated at the bent position, deformation or damage This is prevented.

The support 110 according to this embodiment does not require a mold for manufacturing, so manufacturing costs can be reduced, and it is possible to quickly and easily produce only cutting and bending using a laser cutter.

Since the second to third support parts 114 and 116 are bent at the same angle, respectively, they can be fixed without being inclined toward a specific position when in close contact with the outside of the circularly-rounded muffler 50, thereby simplifying the operation of the operator. It can be installed on the outside of the muffler 50 more easily.

5 , the support part 110 according to another embodiment of the present invention includes a first support rib 110a connecting between the first support part 112 and the second support part 114, and the first It further includes a second support rib 110b connecting between the support 112 and the third support 116 .

The first to second support ribs 110a and 110b are members for connecting the second to third support parts 114 and 116 inclined from the first support part 112 to each other and are fixed through welding.

The first to second support ribs 110a and 110b are installed on both the front and rear surfaces of the support 110 when viewed from the outside, and the shape is not necessarily limited to the shape shown in the drawings.

The first to second support ribs 110a and 110b prevent the second to third support parts 114 and 116 from being widened, and are coupled at a welding site with the muffler 50a due to vibration or impact transmitted from the outside. By preventing the release phenomenon, a stable bonding state is maintained for a long period of time.

Referring to FIG. 6 , concave-convex portions 114a and 116a are respectively formed at the ends bent toward the muffler 50 in the second to third support portions 114 and 116 according to the present embodiment.

As shown in the drawings, the concave-convex portions 114a and 116a are formed to extend repeatedly in the outward and inward directions along the width direction from the extended ends of the second to third support portions 114 and 116 .

When the second to third support parts 114 and 116 are welded to the muffler 50, the protruding portions remain in direct contact with the muffler 50 and are formed in a groove shape. The parts that are rounded to the inside of the second to third support parts 114 and 116 are maintained in a non-contact state with the muffler 50 .

In this case, the welding portion is welded at the same time at the position of the second welding portion (B), which is recessed in a round shape in a groove shape than the first welding portion (A) in which the concave-convex portions (114a, 116a) and the muffler 50 are maintained in point contact. is done

After being welded to the muffler 50, the support 110 may intermittently or continuously transmit an impact to the welding site due to vibration transmitted from the engine 10 or the outside, but as described above, the first, 2 Welding is made to the welding parts (A, B) so that a more stable bonding state is maintained.

In particular, in the second to third support parts 114 and 116 , the external force transmitted due to the shape of the concavo-convex parts 114a and 116a is not concentrated in a specific position but is spread roundly, thereby minimizing a problem due to the concentrated stress.

Therefore, even when the muffler 50 is used for a long period of time, the connecting portion of the connecting pipe 102 is not deformed or damaged, so structural stability is improved.

7, the first support portion 112 according to the present embodiment has a partial opening with a predetermined length from the inner circumferential direction of the insertion hole 112a toward the outside in the radial direction, the connection pipe 102 According to the diameter of the insertion hole (112a) further includes an extension (112b) provided so as to be expandable outward in the radial direction.

The extended portion 112b is formed in the shape shown in the drawing because it is possible to minimize fracture or cracking or stress concentration due to concentrated stress when it is formed in a round true arc shape.

A plurality of extension parts 112b may be formed in the inner circumferential direction with respect to the center of the insertion hole 112a, and may be variously changed without being limited to the positions shown in the drawings.

The extension 112b has an inner diameter that can be expanded radially outward of the insertion hole 112a by the extension 112b even when the diameter of the connecting pipe 102 is larger than the inner diameter of the insertion hole 112a. It is possible to easily perform the installation work for the reinforcing plate 100 more easily.

Referring to FIG. 8, the second to third support parts 114 and 116 according to the present embodiment have round parts 114b and 116b each of which ends extending toward the muffler 50 are wound round inwardly. is formed

After being welded to the muffler 50, the round parts 114b and 116b can support and spread the vibration transmitted from the outside along the rounded shape itself, thereby minimizing the occurrence of short circuit or breakage and deformation at the bonding site. Thus, bonding stability is improved.

As described above, an embodiment of the present invention has been described, but those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. It will be possible to variously modify and change the present invention by, etc., which will also be included within the scope of the present invention.

50: muffler
100: reinforcement plate
102: connecting pipe
110a, 110b: first and second support ribs
112, 114, 116: first, second, and third support parts
112b: extension
114a, 116a: irregularities
114b, 116b: round part

Claims (8)

muffler (50);
a connection pipe 102 communicating with the muffler 50 and introducing exhaust gas generated from the engine 10; and
A muffler for construction machinery including a reinforcing plate (100) coupled to the outside of the connection pipe (102) and provided with a plate-shaped support (110) in close contact with the muffler (50). According to claim 1,
The support part 110 is a muffler for construction machinery including a plate-shaped first support part 112 in which an insertion hole 112a is opened so that the connection pipe 102 is inserted. 3. The method of claim 2,
The support part 110 is formed to extend integrally with the first support part 112 and connects between the second support parts 114 in the form of a plate bent at a predetermined angle toward the muffler 50 from the upper front side. 1 support rib (110a);
Between the first support part 112 and the third support part 116 in the form of a plate extending integrally with the first support part 112 and bent at a predetermined angle toward the muffler 50 from the lower front side A muffler for a construction machine further comprising a second support rib (110b) for connecting. 4. The method of claim 3,
The second to third support parts 114 and 116 are each bent at the same angle for a construction machine muffler. 4. The method of claim 3,
A muffler for a construction machine in which the second to third support portions 114 and 116 have concave-convex portions 114a and 116a formed at ends bent toward the muffler 50, respectively. 6. The method of claim 5,
The concave-convex portions (114a, 116a) are repeatedly formed inward and outward along the width direction of the second to third support portions (114, 116) for a construction machine muffler. 3. The method of claim 2,
The first support part 112 has a partial opening with a predetermined length from the inner circumferential direction of the insertion hole 112a toward the outside in the radial direction so that the insertion hole 112a is formed in a radial direction according to the diameter of the connection pipe 102 . A muffler for a construction machine further comprising an extension (112b) provided to be expandable to the outside. 4. The method of claim 3,
The second to third support parts (114, 116) is a muffler for a construction machine in which the ends extending toward the muffler (50) have round parts (114b, 116b) each wound to be round inward.

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