A baffle for a sound suppressor for garden tools

Abstract

The utility model belongs to the field of silencer, especially relate to a garden tool silencer's partition cover, garden tool silencer's partition cover, the partition cover is used for embedding in the shell of silencer and will the cavity in the shell of silencer divide into air inlet chamber and exhaust chamber, it includes cover body, be equipped with the through -hole of air inlet chamber and exhaust chamber on the cover body, still include a flow guide plate, flow guide plate covers the top of through -hole, and there is a gap between flow guide plate and cover body, and flow guide plate at least one end integral moulding has the connecting edge, and the connecting edge is fixedly connected with cover body, is equipped with the valve piece on one side of exhaust chamber, and one end of valve piece is fixedly connected on cover body, the valve piece covers through -hole, is used for controlling whether through -hole is conducted, the utility model discloses the partition cover of silencer has carried out the improvement, first through the flow guide plate of setting to change the direction of flowing, can effectively reduce the energy of airflow, thereby reducing the energy of airflow, obtains better effect of noise reduction and silencing.

Description

Technical Field

[0001] This utility model belongs to the field of silencers, and specifically relates to a partition cover for a silencer used in 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 muffler's partition cover. First, by setting a guide plate to change the direction of airflow, it can effectively reduce the energy of the airflow, thereby reducing the energy of the airflow and achieving a better noise reduction effect.

[0005] The technical solution of this utility model is as follows: A partition cover for a garden tool muffler, the partition cover being embedded within the muffler housing and dividing the cavity within the muffler housing into an air intake chamber and an exhaust chamber, comprising a cover body, characterized in that: the cover body has a connecting hole connecting the air intake chamber and the exhaust chamber, and further includes a guide plate, the guide plate covering the connecting hole and having a gap between it and the cover body, at least one end of the guide plate being integrally formed with a connecting edge, the connecting edge being fixedly connected to the cover body, and a valve plate being provided on the exhaust chamber side, one end of the valve plate being fixedly connected to the cover body, the valve plate covering the connecting hole for controlling 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 cover body, and the second connecting edge, the valve plate and the cover body are fixed by rivets.

[0007] Furthermore, an opening adjustment plate is provided on the cover body 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 cover body, while the other end is raised to form an opening angle with the surface of the cover body.

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

[0009] Furthermore, the outer edge of the cover body extends to form a limiting edge, which is used to abut against the housing of the muffler to achieve the positioning of the cover body within the housing of the muffler.

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

[0011] In summary, this utility model has the following beneficial effects: This invention improves the muffler's partition cover by using a guide plate to change the direction of airflow and a valve plate to reduce the airflow speed, thus achieving a partition cover with good noise reduction capabilities. Furthermore, the partition cover is positioned with the muffler housing by a limiting edge, resulting in a simple positioning structure that is easy to assemble, simplifies the production process, and improves production efficiency. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the partition cover (including valve plate and opening adjustment plate) of this utility model; Figure 2 This is a front view schematic diagram of the partition cover of this utility model; Figure 3 This is a rear view schematic diagram of the partition cover of this utility model; Figure 4 For the present utility model Figure 3 A cross-sectional view of AA; Figure 5 For the present utility model Figure 3 A cross-sectional view of BB; In the diagram, 1 is the cover body, 10 is the connecting hole, 11 is the limiting edge, and 12 is the protruding cavity. 2 is the guide vane, 20 is the gap, 21 is the connecting edge, and 22 is the second connecting edge. 3 represents the valve plate. 4. To open the adjustment plate. Detailed Implementation

[0013] 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.

[0014] 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.

[0015] 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.

[0016] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0017] See Figures 1 to 5 As shown, a partition cover for a garden tool muffler is used to embed within the muffler housing and divide the cavity inside the muffler housing into an air intake chamber and an exhaust chamber. It includes a cover body 1, which has a connecting hole 10 connecting the air intake chamber and the exhaust chamber. It also includes a guide plate 2, which covers the connecting hole and has a gap 20 between it and the cover body 1. At least one end of the guide plate 2 has an integrally formed connecting edge 21, which is fixedly connected to the cover body 1. A valve plate 3 is provided on the cover body on the exhaust chamber side, with one end fixedly connected to the cover body. The valve plate 3 covers the connecting hole 10 and is used to control whether the connecting hole is open.

[0018] This utility model designs a partition cover for use inside a muffler. Installed within the muffler housing, it divides the internal cavities of the muffler housing into an intake chamber and an exhaust chamber. Exhaust gas from the garden tool engine enters the intake chamber and then flows into the exhaust chamber through a connecting hole on the cover body. To improve the muffler's effectiveness, a guide plate is added. The exhaust gas needs to enter the gap between the guide plate and the cover body from all sides, and then reach the other side of the partition cover through the connecting hole. The guide plate changes the direction of the exhaust gas flow, greatly weakening its energy and thus achieving a significant noise reduction effect. Under normal operating conditions, the valve plate acts as an opener / closer. When the pressure in the intake chamber is low, the valve plate is tightly closed. When it is pushed open by the exhaust gas flow, the exhaust gas flow is blocked by the valve plate and then diffuses outwards, dispersing the airflow and further reducing its energy, thus further improving noise reduction capabilities.

[0019] In one embodiment of this utility model, the guide plate 2 is further provided with a second connecting edge 22. The second connecting edge 22 and the valve plate are respectively located on both sides of the cover body, and the second connecting edge, the valve plate and the cover body are fixed by rivets. Furthermore, the second connecting edge is formed by extending the guide plate. The first connecting edge and the second connecting plate seal the gap between the two sides of the guide plate and the cover body. At this time, the exhaust gas flow can only enter the gap between the guide plate and the cover body from the gap of the other two sides, which is beneficial to control the direction of the airflow. Furthermore, the second connecting edge, the valve plate and the cover body are connected by rivets, which improves the structural strength and connection reliability of each component.

[0020] Furthermore, in one embodiment of this utility model, in addition to the valve plate, an opening adjustment plate 4 is also provided on the cover body 1 on one side of the exhaust chamber. The opening adjustment plate 4 is located above the valve plate 3 and one end is fixedly connected to the cover body 1, while the other end is raised to form an opening angle with the surface of the cover body 1. Specifically, one end of the opening adjustment plate is pressed onto the valve plate and is also connected to the valve plate, the cover body, 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, and on the other hand, it can also control the airflow and improve the muffler's noise reduction effect. Furthermore, the opening adjustment plate provided here has good rigidity and will not deform under the action of exhaust gas flow. The pre-set angle of the opening adjustment plate can control the angle of the valve plate and control the flow of exhaust gas.

[0021] The guide plate 2 is inclined; specifically, the two ends of the guide plate near the muffler housing are higher than the two ends of the guide plate away from the muffler housing, which increases the distance between the two ends of the guide plate near the muffler housing and the partition cover. By increasing the gap, the air intake area between the guide plate and the cover body is increased, ensuring the air intake volume and thus ensuring the muffler's processing capacity.

[0022] Furthermore, the outer edge of the cover body 1 forms a limiting edge 11, which is used to abut against the housing of the muffler to position the cover body within the housing of the muffler. Here, the assembly and positioning of the separation cover and the housing of the muffler are achieved through the cooperation of the limiting edge and the receiving step, without the need for fixing through other processes, simplifying the production process, improving efficiency, and reducing costs. Moreover, the limiting edge does not protrude from the receiving step after assembly, so the limiting edge will not form an obstacle when the muffler is assembled with other equipment, and it is also conducive to the installation of the sealing components.

[0023] Furthermore, the cover body is provided with a protruding cavity 12, 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.

[0024] In summary, this utility model has the following beneficial effects: This invention improves the muffler's partition cover by using a guide plate to change the direction of airflow and a valve plate to reduce the airflow speed, thus achieving a partition cover with good noise reduction capabilities. Furthermore, the partition cover is positioned with the muffler housing by a limiting edge, resulting in a simple positioning structure that is easy to assemble, simplifies the production process, and improves production efficiency.

[0025] 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 partition cover for a garden tool muffler, the partition cover being embedded within the muffler housing and dividing the cavity within the muffler housing into an intake chamber and an exhaust chamber, comprising a cover body, characterized in that... The cover body is provided with a connecting hole connecting the air intake chamber and the exhaust chamber, and also includes a guide plate. The guide plate covers the connecting hole and there is a gap between the guide plate and the cover body. At least one end of the guide plate is integrally formed with a connecting edge, which is fixedly connected to the cover body. A valve plate is provided on the exhaust chamber side. One end of the valve plate is fixedly connected to the cover body. The valve plate covers the connecting hole and is used to control whether the connecting hole is open.

2. The partition cover for 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 cover body, and the second connecting edge, the valve plate and the cover body are fixed by rivets.

3. The partition cover for a garden tool silencer according to any one of claims 1 or 2, characterized in that: An opening adjustment plate is also provided on the cover body 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 cover body. The other end is raised and forms an opening angle with the surface of the cover body.

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

5. The partition cover for the garden tool silencer according to claim 1, characterized in that: The outer edge of the cover body extends to form a limiting edge, which is used to abut against the housing of the muffler to achieve the positioning of the cover body within the housing of the muffler.

6. The partition cover for 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.

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