Silencer exhaust structure and engineering machinery

Abstract

The utility model relates to the technical field of small engineering machinery, and discloses a silencer exhaust structure and engineering machinery, the silencer exhaust structure comprises a mounting plate, an exhaust tail pipe and a transition pipe, the transition pipe is a funnel type structure with a small upper opening and a large lower opening, one end of the exhaust tail pipe is fixedly connected with the upper opening of the transition pipe, and the other end of the exhaust tail pipe is fixedly connected with the lower opening of the transition pipe. A lower opening of the transition pipe is used for covering a top outlet position of a silencer exhaust pipe, the diameter of the lower opening of the transition pipe is larger than that of the silencer exhaust pipe, a mounting plate is arranged on the peripheral side of the joint of the exhaust tail pipe and the transition pipe, and the exhaust tail pipe is mounted on a hood through the mounting plate. The transition pipe extends into the hood and covers the silencer exhaust pipe, the silencer exhaust pipe does not need to extend out of the hood, and the transition pipe is of a funnel-shaped structure with a large upper opening and a large lower opening, so that the hood cannot be interfered in the opening and closing process. In addition, the transition pipe of the funnel-shaped structure can reduce the diameter of the exhaust tail pipe, and the exhaust tail pipe can be better matched with a hood of small engineering machinery.

Description

Technical Field

[0001] The utility model relates to the technical field of small-sized engineering machinery, in particular to a muffler exhaust structure and engineering machinery. Background Art

[0002] Many construction machinery are equipped with exhaust tail pipes to guide and reduce the noise of the exhaust gas discharged from the muffler exhaust pipe. Traditional small excavators need to open a hole in the hood to extend the exhaust tail pipe out of the hood. The diameter of the hole is larger than the diameter of the tail pipe, forming a gap, which makes it easy for rainwater and foreign matter to enter the engine compartment and cause pollution. After searching, application number 202010141829.9 discloses a non-contact muffler exhaust structure, which fixes the exhaust tail pipe to a fixed bracket, and the exhaust tail pipe fixing bracket is fixed on the engine. The exhaust outlet of the muffler exhaust pipe extends into the exhaust tail pipe to form a non-contact gap structure. This structural form can solve the impact of vibration tearing on the muffler and prevent rainwater from entering the muffler exhaust pipe.

[0003] The inventors found that the exhaust outlet of the muffler exhaust pipe of the above-mentioned scheme extends into the exhaust tail pipe, so the exhaust outlet needs to be extended out of the hood. The problems caused by this approach are: first, the diameter of the exhaust tail pipe needs to be larger than the diameter of the muffler exhaust pipe as a whole, and small engineering machinery such as micro-excavators without tails are limited by the turning radius, and the hood design is relatively small, which is obviously not matched with the large diameter exhaust tail pipe; second, after the exhaust outlet extends out of the hood, the opening and closing of the hood is easily interfered by the muffler exhaust pipe. Therefore, this structure requires other door opening methods to be set on the hood, which is relatively inconvenient for small engineering machinery with relatively small hood designs. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a muffler exhaust structure and engineering machinery, in which a transition pipe extends into the interior of the hood and is covered on the muffler exhaust pipe, without the need for the muffler exhaust pipe to extend out of the hood, and the transition pipe is a funnel-shaped structure with a large upper opening and a large lower opening, so that the hood will not be interfered with during the opening and closing process; in addition, the transition pipe with a funnel-shaped structure can also reduce the diameter of the exhaust tail pipe, so that it can better adapt to the hood of small engineering machinery.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] In a first aspect, a muffler exhaust structure includes a mounting plate, an exhaust tail pipe and a transition pipe, wherein the transition pipe is a funnel-shaped structure with a small upper opening and a large lower opening, one end of the exhaust tail pipe is fixedly connected to the upper opening of the transition pipe, the lower opening of the transition pipe is used to cover the top outlet position of the muffler exhaust pipe, the diameter of the lower opening of the transition pipe is larger than the diameter of the muffler exhaust pipe, and a mounting plate is provided on the surrounding side of the connection between the exhaust tail pipe and the transition pipe, and is installed on the hood through the mounting plate.

[0007] As a further implementation, the transition pipe includes a connecting portion, a transition portion and a matching portion which are connected in sequence, and an opening of the connecting portion of the transition pipe is fixedly connected to the exhaust tail pipe.

[0008] As a further implementation, the connecting portion is a tubular structure, and the diameter of the connecting portion is the same as the diameter of the exhaust tail pipe.

[0009] As a further implementation, the transition portion is a truncated cone-shaped structure with openings at both ends.

[0010] As a further implementation, the transition portion is connected to the connecting portion through the first opening, and is connected to the matching portion through the second opening.

[0011] As a further implementation, the diameter of the fitting portion is a tubular structure that is larger than the diameter of the connecting portion, and the diameter of the connecting portion is smaller than the diameter of the muffler exhaust pipe.

[0012] As a further implementation, one end of the exhaust tail pipe passes through the opening of the mounting plate and extends a set distance to be connected to the transition pipe, and the peripheral side of the exhaust tail pipe is welded to the inner wall of the opening.

[0013] As a further implementation, a plurality of mounting holes are provided on the mounting plate.

[0014] As a further implementation, one end of the mounting plate is a triangular structure, and the side of the triangular structure is used to be arranged parallel to the edge of the hood.

[0015] In a second aspect, a construction machine adopts any of the above-described muffler exhaust structures.

[0016] The beneficial effects of the above utility model are as follows:

[0017] 1. The transition pipe of the utility model extends into the hood and is covered on the muffler exhaust pipe, so there is no need for the muffler exhaust pipe to extend out of the hood. The transition pipe is a funnel-shaped structure with a large upper opening and a large lower opening, so the hood will not be interfered with during opening and closing. In addition, the transition pipe with a funnel-shaped structure can also reduce the diameter of the exhaust tail pipe, so that it can better fit the hood of small engineering machinery.

[0018] 2. The transition portion of the utility model is a truncated cone structure, which realizes the transition from the muffler exhaust pipe to the exhaust tail pipe with a relatively small diameter.

[0019] 3. The triangular structure at one end of the mounting plate of the utility model meets the requirement of arranging the exhaust tail pipe close to the edge of small engineering machinery. The side of the triangular structure can be arranged parallel to the edge of the hood, and the edge of the mounting plate will not protrude from the edge of the hood, thereby achieving a reasonable structural arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a first isometric structural schematic diagram of a muffler exhaust structure in an embodiment of the utility model;

[0022] Figure 2 It is a second isometric structural schematic diagram of a muffler exhaust structure in an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the main structure of a muffler exhaust structure in an embodiment of the utility model.

[0024] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0025] Among them: 1. mounting plate, 2. exhaust tail pipe, 3. transition pipe, 31. connecting part, 32. transition part, 33. matching part. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] As mentioned in the background technology, in the prior art, the exhaust outlet of the muffler exhaust pipe extends into the exhaust tail pipe, and the exhaust outlet needs to be extended out of the hood. The problems caused by this method are: first, the diameter of the exhaust tail pipe needs to be larger than the diameter of the muffler exhaust pipe as a whole, and small engineering machinery such as micro excavators without tails are limited by the turning radius, and the hood design is relatively small, which is obviously not matched with the large diameter exhaust tail pipe; second, after the exhaust outlet extends out of the hood, the opening and closing of the hood is easily interfered by the muffler exhaust pipe. Therefore, this structure needs to set other door opening methods on the hood, which is inconvenient for small engineering machinery with relatively small hood design.

[0028] Embodiment 1

[0029] In a typical implementation of the present invention, reference is made to Figure 1-Figure 3 As shown, a muffler exhaust structure includes a mounting plate 1, an exhaust tail pipe 2 and a transition pipe 3. The exhaust tail pipe 2 and the transition pipe 3 are welded and connected. The mounting plate 1 is welded on the peripheral side of the connection between the exhaust tail pipe 2 and the transition pipe 3, and is installed on the hood through the mounting plate 1.

[0030] like Figure 2 As shown, the transition pipe 3 of this embodiment is a funnel-shaped structure with a small upper opening and a large lower opening, and the transition pipe 3 includes a connecting portion 31, a transition portion 32 and a matching portion 33 which are sequentially connected as one body. The connecting portion 31 is a tubular structure, and the transition portion 32 is a truncated cone structure with openings at both ends. The transition portion 32 can be a tubular structure or an annular structure.

[0031] The transition portion 32 is welded to the connection portion 31 through a first opening at the top, and is welded to the matching portion 33 through a second opening at the bottom.

[0032] A circular opening is provided in the middle of the mounting plate 1, and the inner diameter of the circular opening is adapted to the outer diameter of the exhaust tail pipe 2. One end of the exhaust tail pipe 2 passes through the opening of the mounting plate 1 and extends a set distance before welding the transition pipe 3. The peripheral side of the exhaust tail pipe 2 is welded to the inner wall of the opening of the mounting plate 1. The mounting plate 1 is provided with a plurality of mounting holes, which can be bolt holes or oblong holes, and the mounting plate 1 is fixedly connected to the hood through the mounting holes.

[0033] like Figure 3 As shown, the diameter of the connecting portion 31 is smaller than the diameter of the matching portion, so the upper opening of the transition pipe 3 is small and the lower opening is large, and the bottom end of the exhaust tail pipe 2 is fixedly connected to the upper opening of the transition pipe 3. In other examples, the connecting portion 31 can be a portion of the exhaust tail pipe 2 that passes through the opening of the mounting plate 1 and extends out.

[0034] The diameter of the connecting portion 31 of this embodiment is the same as the diameter of the exhaust tail pipe 2 , the lower opening diameter of the matching portion 33 is larger than the diameter of the muffler exhaust pipe, and the diameter of the muffler exhaust pipe is larger than the diameter of the exhaust tail pipe 2 .

[0035] The lower opening of the transition pipe 3 of this embodiment is used to cover the top outlet position of the muffler exhaust pipe, and the diameter of the lower opening of the matching portion 32 of the transition pipe 3 is larger than the diameter of the muffler exhaust pipe.

[0036] In small-scale construction machinery, such as micro excavators without tails, the hood design is relatively small due to the limitation of the turning radius. The engine exhaust is generally located at the rear of the excavator. In order to adapt to the small-sized hood, the exhaust tail pipe should not be too large, otherwise the exhaust tail pipe will occupy a larger opening space of the hood, which is not only unsightly, but also not conducive to the spatial setting of the structure.

[0037] In this embodiment, the exhaust tail pipe 2 and the transition pipe 3 are installed through the mounting plate 1. The exhaust tail pipe 2 passes through the mounting plate 1 and the hood and then extends to the inside of the hood and is connected to the transition pipe 3. The transition pipe 3 is a funnel-shaped structure with a large lower opening. The lower cover is arranged on the top side of the muffler exhaust pipe. The transition portion 32 does not contact the muffler exhaust pipe, rainwater will not enter the muffler, and the funnel-shaped transition pipe 3 has a safe distance from the muffler exhaust pipe, which reduces the risk of interference during the opening and closing of the hood and allows the hood to be opened smoothly.

[0038] The funnel-shaped transition pipe 3 can reduce the diameter of the exhaust tail pipe 2, ensuring aesthetics while also being better adapted to the hood of small engineering machinery.

[0039] like Figure 1 As shown, one end of the mounting plate 1 is a triangular structure. The tailless micro excavator is limited by the turning radius, so the hood design is relatively small. The engine exhaust is generally located at the rear of the excavator, and the exhaust tail pipe that matches it is mostly arranged close to the edge. Based on this situation, this structure can reasonably utilize the limited space, and arrange the side of the triangular structure parallel to the edge of the hood, so that the edge of the mounting plate will not protrude from the edge of the hood, and a reasonable structural arrangement is achieved.

[0040] Embodiment 2

[0041] In a typical implementation of the present invention, reference is made to Figure 1-Figure 3 As shown, an engineering machine adopts the muffler exhaust structure in the first embodiment, and the engineering machine can be used for a small excavator of a micro excavator without a tail.

[0042] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A muffler exhaust structure, characterized in that: It includes a mounting plate, an exhaust tail pipe and a transition pipe. The transition pipe is a funnel-shaped structure with a small upper opening and a large lower opening. One end of the exhaust tail pipe is fixedly connected to the upper opening of the transition pipe. The lower opening of the transition pipe is used to cover the top outlet position of the muffler exhaust pipe. The diameter of the lower opening of the transition pipe is larger than the diameter of the muffler exhaust pipe. A mounting plate is provided on the surrounding side of the connection between the exhaust tail pipe and the transition pipe, and is installed on the hood through the mounting plate.

2. A muffler exhaust structure according to claim 1, characterized in that: The transition pipe comprises a connecting portion, a transition portion and a matching portion which are connected in sequence, and an opening of the connecting portion of the transition pipe is fixedly connected to the exhaust tail pipe.

3. A muffler exhaust structure according to claim 2, characterized in that: The connecting portion is a tubular structure, and the diameter of the connecting portion is the same as the diameter of the exhaust tail pipe.

4. A muffler exhaust structure according to claim 2, characterized in that: The transition portion is a truncated cone structure with openings at both ends.

5. A muffler exhaust structure according to claim 4, characterized in that: The transition portion is connected to the connecting portion through the first opening, and is connected to the matching portion through the second opening.

6. A muffler exhaust structure according to claim 2 or 5, characterized in that: The diameter of the matching part is a tubular structure that is larger than the diameter of the connecting part, and the diameter of the connecting part is smaller than the diameter of the muffler exhaust pipe.

7. A muffler exhaust structure according to claim 1, characterized in that: One end of the exhaust tail pipe passes through the opening of the mounting plate and is connected to the transition pipe after extending a set distance, and the peripheral side of the exhaust tail pipe is welded to the inner wall of the opening.

8. The muffler exhaust structure according to claim 1, characterized in that: The mounting plate is provided with a plurality of mounting holes.

9. The muffler exhaust structure according to claim 1, characterized in that: One end of the mounting plate is a triangular structure, and the side of the triangular structure is used to be arranged parallel to the edge of the hood.

10. An engineering machine, characterized in that: The engineering machinery adopts the muffler exhaust structure as described in any one of claims 1 to 9.

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