Silencer for garden tools

Abstract

The utility model belongs to the field of muffler, especially relate to a muffler for garden tool, it includes the cover shell, forms the cavity in the cover shell, still include the partition cover, the partition cover is inlayed and is arranged in the cover shell, the cavity in the cover shell is divided into the air inlet chamber and the exhaust chamber, the cover shell be equipped with the exhaust port that communicates with the exhaust chamber, the partition cover be equipped with the communication hole that communicates the air inlet chamber and the exhaust chamber, still include a deflector, the deflector covers the top of communication hole, and there is a gap between with the partition cover, the deflector at least one end integral moulding has the connecting edge, the connecting edge is fixedly connected with the partition cover, is equipped with the valve piece in the exhaust chamber one side, one end of valve piece is fixedly connected on the partition cover, the valve piece covers the communication hole, is used for controlling whether the communication hole is on -off, the utility model discloses through the partition cover and set up the deflector and the valve piece to change the direction and distance that the airflow flows in the cover shell, promote the sound attenuation ability of muffler, satisfy the demand of garden tool use.

Description

Technical Field

[0001] This utility model belongs to the field of silencers, and specifically relates to a silencer for garden tools. Background Technology

[0002] Mufflers are used to reduce the noise of exhaust from the engines of garden machinery. As the design of garden machinery changes, the structural design of mufflers is becoming increasingly difficult.

[0003] When designing the muffler, our designers found Chinese patent CN206054230U, entitled "Muffler for Compressors and Compressor Having the Same," which discloses a muffler suitable for compressors. This muffler includes a valve plate with an exhaust port and an exhaust valve plate. The exhaust valve plate is movably disposed within the muffler cavity and connected to the valve plate to open and close the exhaust port. In this prior art, there are no other muffler structures on either side of the exhaust port; the airflow enters the muffler cavity and is directly discharged through the exhaust port. The exhaust valve plate alone slows down and silences the airflow, resulting in poor muffler performance. Considering the application scenario of the garden machinery in this application, our designers have made further improvements. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention improves the silencer by dividing the cavity of the casing with a partition cover and changing the direction and distance of airflow within the casing through the design of guide plates and valves, thereby enhancing the silencer's noise reduction capability and meeting the needs of garden tools.

[0005] The technical solution of this utility model is as follows: A silencer for garden tools includes a housing with a cavity inside. It is characterized by further including a partition cover, which is embedded within the housing and divides the cavity into an air inlet chamber and an exhaust chamber. The housing has an exhaust port communicating with the exhaust chamber, and the partition cover has a connecting hole communicating with the air inlet chamber and the exhaust chamber. It also includes a guide plate, which covers the connecting hole and has a gap with the partition cover. At least one end of the guide plate has an integrally formed connecting edge, which is fixedly connected to the partition cover. A valve plate is provided on one side of the exhaust chamber, with one end fixedly connected to the partition cover. The valve plate covers the connecting hole and is used to control whether the connecting hole is open.

[0006] Furthermore, the guide plate is also provided with a second connecting edge, which and the valve plate are located on both sides of the partition cover, and the second connecting edge, the valve plate and the partition cover are fixed by rivets.

[0007] Furthermore, an opening adjustment plate is provided on one side of the exhaust chamber. The opening adjustment plate is located above the valve plate and one end is fixedly connected to the partition cover, while the other end is raised to form an opening angle with the surface of the partition cover.

[0008] Furthermore, the aforementioned guide plate is inclined.

[0009] Furthermore, a receiving step is formed on the cover along the edge of the cavity, and a limiting edge is formed on the outer edge of the partition cover. The limiting edge fits into the receiving step, and the depth of the receiving step is equal to the height of the limiting edge.

[0010] Furthermore, the partition cover is provided with a protruding cavity, which corresponds to the outlet of the power unit of the garden tool.

[0011] Furthermore, the perimeter of the cover is extended with connecting plates, the edges of which are bent to form reinforcing edges, and the connecting plates are provided with several connecting holes.

[0012] In summary, this utility model has the following beneficial effects: This invention improves the structure of the muffler. First, a partition cover divides the cavity within the casing, and a connecting hole connects the two cavities, extending the airflow travel within the casing. Second, a valve controls the connection between the exhaust and intake cavities. Airflow entering the intake cavity cannot directly enter the exhaust cavity through the connecting hole. When the intake cavity reaches a set pressure, this pressure pushes open the valve, allowing airflow to enter the exhaust cavity through the connecting hole. Furthermore, the exhaust port is located on the side wall of the casing, with the axis of the connecting hole forming a 90° angle with the axis of the exhaust port. The intersection of the airflow directions causes the airflow entering and exiting the exhaust chamber to intersect, changing the direction of airflow and effectively reducing its energy. This results in better noise reduction. Furthermore, a deflector is added, which is connected to the partition cover via a connecting edge. The connecting edge blocks the gap between the deflector and the partition cover, allowing airflow to enter the gap between the deflector and the partition cover only from the edges of other deflectors without connecting edges. Here, the airflow velocity is also reduced by changing the direction of airflow, thus achieving better noise reduction. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the housing of this utility model; Figure 3 This is a three-dimensional schematic diagram of the partition cover (including valve plate and opening adjustment plate) of this utility model; Figure 4 This is a front view schematic diagram of the present utility model; Figure 5 for Figure 4 A cross-sectional view of AA in the diagram; Figure 6 for Figure 4 Cross-sectional view of BB; In the diagram, 1 is the casing, 10 is the cavity, 100 is the air inlet chamber, 101 is the exhaust chamber, 11 is the exhaust port, 102 is the receiving step, 14 is the connecting plate, 140 is the reinforcing edge, and 141 is the connecting hole. 2 is a partition cover, 20 is a connecting hole, 21 is a limiting edge, and 22 is a convex cavity. 3 represents the guide vane, 30 represents the gap, 31 represents the connecting edge, and 32 represents the second connecting edge. 4 represents the valve plate. 5 is for opening the adjustment plate. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0015] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0018] Figure 1 This is a three-dimensional schematic diagram of the silencer for garden tools according to this utility model. (See attached diagram) Figure 1As shown, a garden tool muffler includes a housing 1 with a cavity 10 inside, and a partition cover 2. The partition cover 2 is embedded in the housing 1 and divides the cavity 10 inside the housing 1 into an air intake cavity 100 and an exhaust cavity 101. The housing 1 has an exhaust port 11 that communicates with the exhaust cavity. The partition cover 2 has a connecting hole 20 that connects the air intake cavity and the exhaust cavity. It also includes a guide plate 3, which covers the connecting hole and has a gap 30 between it and the partition cover 2. At least one end of the guide plate 3 has an integrally formed connecting edge 31, which is fixedly connected to the partition cover 2. A valve plate 4 is provided on one side of the exhaust cavity 101. One end of the valve plate 4 is fixedly connected to the partition cover 2. The valve plate 4 covers the connecting hole and is used to control whether the connecting hole is open.

[0019] This invention improves the structure of the muffler. First, a partition cover divides the cavity within the casing, and a connecting hole connects the two cavities, extending the airflow travel within the casing. Second, a valve controls the connection between the exhaust and intake cavities. Airflow entering the intake cavity cannot directly enter the exhaust cavity through the connecting hole. When the intake cavity reaches a set pressure, this pressure pushes open the valve, allowing airflow to enter the exhaust cavity through the connecting hole. Furthermore, the exhaust port is located on the side wall of the casing, with the axis of the connecting hole forming a 90° angle with the axis of the exhaust port. The intersection of the airflow directions causes the airflow entering and exiting the exhaust chamber to intersect, changing the direction of airflow and effectively reducing its energy. This results in better noise reduction. Furthermore, a deflector is added, which is connected to the partition cover via a connecting edge. The connecting edge blocks the gap between the deflector and the partition cover, allowing airflow to enter the gap between the deflector and the partition cover only from the edges of other deflectors without connecting edges. Here, the airflow velocity is also reduced by changing the direction of airflow, thus achieving better noise reduction.

[0020] See Figure 1 and Figure 4 As shown, the guide plate 3 is also provided with a second connecting edge 32. The second connecting edge 32 and the valve plate are located on both sides of the partition cover, and the second connecting edge, valve plate and partition cover are fixed by rivets. In this embodiment, the two ends of the guide plate are formed with connecting edges. Specifically, the two connecting edges are located at the ends of the guide plate away from the cover. The connecting edges block the gap between the guide plate and the partition cover. The corresponding airflow can only flow into the gap between the guide plate and the partition cover from the edges of the other two guide plates without connecting edges, changing the direction of the airflow and increasing the airflow stroke, further improving the noise reduction effect. At the same time, the second connecting plate, valve plate and partition cover are fixed by sandwich riveting, which improves the connection reliability of each component and the partition cover.

[0021] See Figure 3 and Figure 6As shown, an opening adjustment plate 5 is also provided on one side of the exhaust chamber 101. The opening adjustment plate 5 is located above the valve plate and one end is fixedly connected to the partition cover 2. The other end is raised and forms an opening angle with the surface of the partition cover. Specifically, one end of the opening adjustment plate is pressed onto the valve plate and is also connected to the valve plate, the partition cover and the second connecting plate by rivets. The valve plate is made of stainless steel strip with a thickness of 0.15-0.2mm. On the one hand, this ensures the lightweight of the valve plate. On the other hand, the flow rate of the airflow can be controlled by the valve plate, thereby improving the noise reduction effect. Furthermore, the opening angle between the opening adjustment plate and the partition cover is used to control the angle of the valve plate and control the flow rate of the airflow.

[0022] See Figure 6 As shown, the guide plate is inclined, with the two ends of the guide plate near the cover being higher than the two ends of the guide plate away from the cover. This increases the distance between the two ends of the guide plate near the cover and the partition cover. By increasing the gap, the air intake area between the guide plate and the partition cover is increased, ensuring the air intake volume and thus ensuring the processing capacity of the silencer.

[0023] See Figure 2 , Figure 3 and Figure 4 As shown, a receiving step 102 is formed on the cover along the edge of the cavity 10. A limiting edge 21 is formed on the outer edge of the partition cover 2. The limiting edge 21 fits into the receiving step 102, and the depth of the receiving step is equal to the height of the limiting edge. Here, the assembly and positioning of the partition cover and the cover are realized through the cooperation of the limiting edge and the receiving step, without the need for other processes to fix it, simplifying the production process, improving efficiency, and reducing costs. Moreover, the limiting edge does not protrude from the receiving step after assembly. When the muffler is assembled with other equipment, the limiting edge will not form an obstacle and is conducive to the installation of sealing components.

[0024] See Figure 4 and Figure 5 As shown, the partition cover 2 has a protruding cavity 22, which corresponds to the outlet of the power unit of the garden tool. The cavity increases the space on the air intake side and corresponds to the outlet of the power unit. The cavity is located on the side relatively far from the connecting hole. Therefore, when the gas comes out of the outlet of the power unit, it enters a larger cavity, giving the gas sufficient space to diffuse. Then, it changes direction on the air intake side and enters the exhaust side through the connecting hole. During this process, the gas consumes a large amount of energy, thereby achieving a better noise reduction effect.

[0025] See Figure 1As shown, a connecting plate 14 extends around the perimeter of the cover 1. The edge of the connecting plate 14 is bent to form a reinforcing edge 140. The connecting plate is provided with a plurality of connecting holes 141. The connecting plate and the reinforcing plate improve the strength of the edge of the cover. At the same time, the reinforcing edge has a certain thickness, which facilitates the installation of sealing components between the cover and the connecting device, thereby improving the sealing performance between the cover and the connecting device. Moreover, the connection between the cover and the connecting device can be achieved by screws alone, which is convenient for installation.

[0026] In summary, this utility model has the following beneficial effects: This invention improves the structure of the muffler. First, a partition cover divides the cavity within the casing, and a connecting hole connects the two cavities, extending the airflow travel within the casing. Second, a valve controls the connection between the exhaust and intake cavities. Airflow entering the intake cavity cannot directly enter the exhaust cavity through the connecting hole. When the intake cavity reaches a set pressure, this pressure pushes open the valve, allowing airflow to enter the exhaust cavity through the connecting hole. Furthermore, the exhaust port is located on the side wall of the casing, with the axis of the connecting hole forming a 90° angle with the axis of the exhaust port. The intersection of the airflow directions causes the airflow entering and exiting the exhaust chamber to intersect, changing the direction of airflow and effectively reducing its energy. This results in better noise reduction. Furthermore, a deflector is added, which is connected to the partition cover via a connecting edge. The connecting edge blocks the gap between the deflector and the partition cover, allowing airflow to enter the gap between the deflector and the partition cover only from the edges of other deflectors without connecting edges. Here, the airflow velocity is also reduced by changing the direction of airflow, thus achieving better noise reduction.

[0027] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A silencer for garden tools, comprising a housing with a cavity formed inside the housing, characterized in that... It also includes a partition cover, which is embedded in the housing and divides the cavity inside the housing into an air intake chamber and an exhaust chamber. The housing has an exhaust port that communicates with the exhaust chamber. The partition cover has a connecting hole that connects the air intake chamber and the exhaust chamber. It also includes a guide plate, which covers the connecting hole and has a gap between it and the partition cover. At least one end of the guide plate has an integrally formed connecting edge, which is fixedly connected to the partition cover. A valve plate is provided on the exhaust chamber side, and one end of the valve plate is fixedly connected to the partition cover. The valve plate covers the connecting hole and is used to control whether the connecting hole is open.

2. The garden tool silencer according to claim 1, characterized in that: The guide plate is also provided with a second connecting edge, which and the valve plate are located on both sides of the partition cover, and the second connecting edge, the valve plate and the partition cover are fixed by rivets.

3. The garden tool silencer according to any one of claims 1 or 2, characterized in that: An opening adjustment plate is also provided on one side of the exhaust chamber. The opening adjustment plate is located above the valve plate and one end is fixedly connected to the partition cover. The other end is raised and forms an opening angle with the surface of the partition cover.

4. The garden tool silencer according to claim 1, characterized in that: The guide plate is set at an angle.

5. The garden tool silencer according to claim 1, characterized in that: A receiving step is formed on the cover along the edge of the cavity. A limiting edge is formed on the outer edge of the partition cover. The limiting edge fits into the receiving step, and the depth of the receiving step is equal to the height of the limiting edge.

6. The garden tool silencer according to claim 1, characterized in that: The partition cover has a protruding cavity that corresponds to the outlet of the power unit of the garden tool.

7. The garden tool silencer according to any one of claims 1 or 5, characterized in that: The perimeter of the cover is extended with connecting plates, the edges of which are bent to form reinforcing edges, and the connecting plates are provided with several connecting holes.

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