Silencing structure and garden air blower

Abstract

The utility model relates to the field of garden electric tools, and particularly discloses a noise reduction structure and a garden air blower, the noise reduction structure comprises a rear machine shell and a noise reduction layer laid on the inner wall face of the rear machine shell, and the inner wall face of the rear machine shell is provided with a fixing piece mounting part; the inner wall face of the rear machine shell extends from the connecting end to the opening end to form an annularly coherent noise reduction layer assembly face, the noise reduction layer assembly face is not separated by the fixing piece installation part, a noise reduction layer can be laid on the noise reduction layer assembly face of the rear machine shell, the noise reduction layer can be integrally attached to the inner wall face of the rear machine shell in the annular direction, and in the noise reduction layer installation process, the noise reduction layer is not prone to falling off. And a plurality of silencing layer units do not need to be spliced, so that the mounting compactness of the silencing layer can be improved, and the use effect of reducing wind noise can be achieved.

Description

Technical Field

[0001] The present application relates to the field of garden power tools, and in particular to a silencer structure and a garden blower. Background Art

[0002] A garden blower is a commonly used garden power tool, which is mainly used to use airflow to clean up fallen leaves, grass clippings, road dust, snow, etc.

[0003] When the garden blower is working, the fan inside the casing is started, and the outside air enters the duct inside the casing from the air inlet of the casing, and then flows out from the air outlet on the casing. During actual operation, when the outside air flows into the air inlet of the casing at a high speed, a large wind noise will be generated. Therefore, sound-absorbing cotton will be laid on the inner wall of the air inlet of the casing. During actual assembly, considering the safety of the blower, an air inlet cover will be provided at the air inlet of the casing. The air inlet of the casing is provided with multiple screw mounting parts, and the air inlet cover is fixedly connected to the screw mounting parts by screws. During the actual production process, when the rear casing where the air inlet is located is demoulded, the screw mounting parts on its inner wall will extend from one end of the inner wall of the rear casing to the other end, and the screw mounting parts will separate the inner wall surface of the rear casing. When the sound-absorbing cotton is laid on the inner wall surface of the rear casing, the screw mounting parts will block the continuous laying of the sound-absorbing cotton, and the sound-absorbing cotton needs to be spliced ​​on the inner wall of the rear casing, which will affect the laying effect of the sound-absorbing cotton. Utility Model Content

[0004] The purpose of at least one specific implementation of the utility model is to solve the defects of the prior art and provide a sound-absorbing structure.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A sound-absorbing structure, comprising:

[0007] rear housing;

[0008] A sound-absorbing layer is laid on the inner wall surface of the rear casing;

[0009] One end of the rear housing is an open end, and the other end is a connection end;

[0010] A fixing part installation part is provided on the inner wall surface of the rear casing;

[0011] The inner wall surface of the rear housing extends from the connecting end to the opening end to form an annularly continuous sound-absorbing layer assembly surface, and the sound-absorbing layer assembly surface is not annularly divided by the fixing component mounting portion.

[0012] Through the above technical solution, when the sound-absorbing layer is laid on the sound-absorbing layer assembly surface of the rear casing, the sound-absorbing layer can be circumferentially adhered to the inner wall surface of the rear casing as a whole. In this way, during the installation of the sound-absorbing layer, there is no need to splice multiple sound-absorbing layer units, which can improve the installation compactness of the sound-absorbing layer and the effect of reducing wind noise.

[0013] Furthermore, the surface of the rear housing is provided with a mounting surface corresponding to the grip housing, and the mounting surface is sunken relative to the surface of the rear housing;

[0014] The assembly surface is connected with the surface of the rear housing through a transition surface.

[0015] Through the above technical solution, when the rear casing and the holding casing are assembled, after the two casing units of the holding casing are clamped on the outer side of the rear casing, the end of the casing unit coincides with the transition surface of the rear casing, and the transition surface can support and position the end of the casing unit, which also has a positioning effect on the assembly of the casing unit and the rear casing.

[0016] Furthermore, the portion where the transition surface is located is constructed as a limit portion on the inner wall surface of the rear casing, and the area between the upper limit portion and the opening end of the inner wall surface of the rear casing forms the above-mentioned sound-absorbing layer assembly surface, and the sound-absorbing layer is attached to the sound-absorbing layer assembly surface, one side of the sound-absorbing layer is in contact with the limit portion, and the other side extends to the opening end.

[0017] Through the above technical solution, after the sound-absorbing layer is attached to the assembly surface of the sound-absorbing layer, the limiting part can limit one side of the attached sound-absorbing layer. When the sound-absorbing layer is attached, it can be arranged according to the direction of the limiting part, and the installation of the sound-absorbing layer is also relatively convenient.

[0018] Furthermore, the aperture of the rear housing gradually decreases from the opening end to the connection end, wherein the opening end is set as the air inlet end.

[0019] Furthermore, a plurality of supporting ribs are provided on the assembly surface of the sound-absorbing layer, and the supporting ribs are supported on the back side of the sound-absorbing layer.

[0020] Furthermore, the support ribs extend from the limiting portion to the opening end of the rear housing, and the height of the support ribs gradually increases from the opening end to the limiting portion.

[0021] Through the above technical scheme, the structure of the rear casing is designed to be trumpet-shaped, and the diameter of the open end is larger than that of the connecting end, mainly to facilitate the air intake at the open end. In view of the special structure of the rear casing, the inner wall surface of the rear casing is constructed as an inclined surface. Therefore, the present application provides a plurality of supporting ribs on the assembly surface of the sound-absorbing layer, and the height of the supporting ribs gradually increases from the opening end to the limiting portion. After the sound-absorbing layer is laid on the outside of the supporting ribs, the surface of the sound-absorbing layer can be flush with the surface of the limiting portion and smoothly connected with the wall surface of the rear casing where the sound-absorbing layer is not installed. In this way, after the sound-absorbing layer is attached to the inner wall surface of the rear casing, the inner wall surface of the rear casing as a whole is a smooth curved surface, which improves the assembly effect and quality.

[0022] Furthermore, an air inlet cover is provided at the open end of the rear housing, and the air inlet cover is connected to the fixing member installation portion through a fixing member, and one end of the air inlet cover is in contact with the edge of the sound-absorbing layer.

[0023] Through the above technical solution, after the air inlet cover is installed at the open end of the rear casing, one side edge of the sound-absorbing layer on the inner wall of the rear casing abuts against the limiting portion, and the other side edge touches one end of the air inlet cover, which is equivalent to the sound-absorbing layer being clamped between the limiting portion and the air inlet cover. After the back side of the sound-absorbing layer is bonded to the inner wall of the rear casing by glue, it is installed very firmly.

[0024] Furthermore, the sound-absorbing layer is made of sound-absorbing cotton.

[0025] Furthermore, a fan is provided at the connection end of the rear casing.

[0026] The beneficial technical effect of the sound-absorbing structure provided by the present application compared with the prior art is that the inner wall surface of the rear casing of the present application extends from the connecting end to the opening end to form a circumferentially continuous sound-absorbing layer assembly surface, and the sound-absorbing layer assembly surface is not circumferentially divided by the fixing part installation part. When the sound-absorbing layer is laid on the sound-absorbing layer assembly surface of the rear casing, the sound-absorbing layer can be circumferentially attached to the inner wall surface of the rear casing as a whole. During the installation of the sound-absorbing layer, there is no need to splice multiple sound-absorbing layer units, which can improve the installation compactness of the sound-absorbing layer and the use effect of reducing wind noise.

[0027] Another technical solution adopted by the present application is to provide a garden blower including the above-mentioned silencer structure.

[0028] Through the above technical solution, the interior of the rear casing of the garden blower can be circumferentially fitted with a sound-absorbing layer in the above manner, without the need for splicing through multiple sound-absorbing layer units, and the installation effect of the sound-absorbing layer is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of the structure of the rear housing in a certain embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the structure after the sound-absorbing layer is installed inside the rear casing of the present application;

[0032] Figure 3 This is a schematic diagram of the structure before the sound-absorbing layer is installed inside the rear casing of the present application;

[0033] Figure 4 This is a schematic diagram of the assembly of the rear housing and the air inlet cover of the present application;

[0034] Figure 5 for Figure 4 Schematic cross-sectional view of ;

[0035] Figure 6 This is a schematic diagram of the structure of a garden blower in an embodiment of the present application;

[0036] Figure 7 for Figure 6 Explosion diagram. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example 1

[0039] Reference Figure 1 , Figure 2 A sound-absorbing structure 100 includes a rear housing 10 and a sound-absorbing layer 11 laid on the inner wall surface of the rear housing 10, wherein the sound-absorbing layer 11 mainly plays a role in reducing wind noise, and the material of the sound-absorbing layer 11 is preferably sound-absorbing cotton;

[0040] One end of the rear casing 10 is an opening end 101, and the other end is a connecting end 102. In the present embodiment, the opening end 101 is designed as an air inlet end, and the connecting end 102 is provided with a fan. After the fan is started, the outside air enters the interior of the rear casing 10 from the opening end 101, and flows from the connecting end 102 to the fan. Under the high-speed flow of the airflow, in order to reduce the wind noise, a sound-absorbing layer 11 is laid on the inner wall surface of the rear casing 10.

[0041] In this embodiment, the inner wall surface of the rear housing 10 extends from the connection end 102 to the open end 101 to form a sound-absorbing layer assembly surface 103, and the sound-absorbing layer 11 can be laid on the sound-absorbing layer assembly surface 103; in addition, a fixing member installation portion 12 is provided on the inner wall surface of the rear housing 10, one end of the fixing member installation portion 12 extends to the open end 101 of the rear housing 10, and the other end of the fixing member installation portion 12 does not extend to the connection end 102 of the rear housing 10. Specifically, the length of the fixing member installation portion 12 is much shorter than the length of the open end 101. 1 to the connection end 102, so that, in the circumferential direction, the sound-absorbing layer assembly surface 103 will not be divided by the fixing part installation portion 12, and the sound-absorbing layer assembly surface 103 is a circumferentially continuous curved surface. When the sound-absorbing layer 11 is laid on the sound-absorbing layer assembly surface 103 of the rear casing 10, the sound-absorbing layer 11 can be circumferentially attached to the inner wall surface of the rear casing 10 as a whole. During the installation of the sound-absorbing layer 10, there is no need to splice multiple sound-absorbing layer units, which can improve the installation compactness of the sound-absorbing layer 11 and the use effect of reducing wind noise.

[0042] In addition, the surface of the rear housing 10 is provided with an assembly surface 104 corresponding to the holding housing. The assembly surface 104 is sunken relative to the surface of the rear housing 10, and the assembly surface 104 is connected with the surface of the rear housing 10 through a transition surface 105. When the rear housing 10 and the holding housing are assembled, after the two housing units of the holding housing are clamped on the outside of the rear housing 10, the end of the housing unit is matched with the transition surface 105 of the rear housing 10, and the transition surface 105 can support and position the end of the housing unit, which also has a positioning effect on the assembly of the housing unit and the rear housing.

[0043] Reference Figure 3 In some embodiments, the transition surface 105 is located at a position on the inner wall surface of the rear casing 10 as a limiting portion 106. The area between the upper limiting portion 106 and the opening end 101 of the inner wall surface of the rear casing 10 forms the above-mentioned sound-absorbing layer assembly surface 103. After the sound-absorbing layer 11 is attached to the sound-absorbing layer assembly surface 103, one side of the sound-absorbing layer 11 contacts the limiting portion 106, and the other side extends to the opening end 101. The limiting portion 106 can limit one side of the attached sound-absorbing layer 11. When the sound-absorbing layer 11 is attached, it can be arranged according to the direction of the limiting portion 106, and the installation of the sound-absorbing layer 11 is also relatively convenient.

[0044] In addition, in some embodiments, the diameter of the rear housing 10 gradually decreases from the opening end 101 to the connecting end 102, wherein the opening end 101 is set as the air inlet end, and a plurality of support ribs 107 are provided on the sound-absorbing layer assembly surface 103, and the support ribs 107 are supported on the back side of the sound-absorbing layer 11, and the support ribs 107 extend from the limiting portion 106 to the opening end 101 of the rear housing 10, and the height of the support ribs 107 gradually increases from the opening end 101 to the limiting portion 106.

[0045] Specifically, the structure of the rear casing 10 is designed to be trumpet-shaped, and the diameter of the opening end 101 thereof is larger than that of the connecting end 102, mainly to facilitate the air intake at the opening end. In view of the special structure of the rear casing 10, the inner wall surface of the rear casing 10 is constructed as an inclined surface. Therefore, after the present application provides a plurality of support ribs 107 on the sound-absorbing layer assembly surface 103, the height of the support ribs 107 gradually increases from the opening end 101 to the limiting portion 106. After the sound-absorbing layer 11 is laid on the outside of the support ribs 107, the surface of the sound-absorbing layer 11 can be flush with the surface of the limiting portion 106 and smoothly connected with the wall surface of the rear casing 10 where the sound-absorbing layer 11 is not installed. In this way, after the sound-absorbing layer 11 is attached to the inner wall surface of the rear casing 10, the inner wall surface of the rear casing 10 as a whole is a smooth curved surface, which improves the assembly effect and quality.

[0046] Further, refer to Figure 4 , Figure 5 In some embodiments, an air inlet cover 20 is provided at the open end 101 of the rear housing 10 . The air inlet cover 20 is connected to the fixing member mounting portion 12 via a fixing member 30 (preferably a screw), and one end of the air inlet cover 20 contacts the edge of the sound-absorbing layer 11 .

[0047] After the air inlet cover 20 is installed at the open end 101 of the rear casing 10, one side edge of the sound-absorbing layer 11 on the inner wall of the rear casing abuts against the limiting portion 106, and the other side edge touches one end of the air inlet cover 20, which is equivalent to the sound-absorbing layer 11 being clamped between the limiting portion 106 and the air inlet cover 20. After the back side of the sound-absorbing layer 11 is bonded to the inner wall of the rear casing 10 by glue, it is installed very firmly.

[0048] Example 2

[0049] Reference Figure 6 , Figure 7Based on the same technical concept, the embodiment of the present application provides a garden blower 200, which includes the silencer structure 100 in the above-mentioned embodiment 1. The shell of the garden blower 200 includes the rear shell 10 and the holding shell in the silencer structure 100. The shell unit 40 of the holding shell is clamped on the outside of the rear shell 10. The interior of the rear shell 10 can be annularly fitted with a silencer layer in the manner of the above-mentioned embodiment 1, without the need for splicing through multiple silencer layer units, and the installation effect of the silencer layer is good.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A sound-absorbing structure, comprising: rear housing; A sound-absorbing layer is laid on the inner wall surface of the rear casing; The feature is that one end of the rear housing is an open end, and the other end is a connecting end; A fixing member installation portion is provided on the inner wall surface of the rear housing; The inner wall surface of the rear housing extends from the connecting end to the opening end to form an annularly continuous sound-absorbing layer assembly surface, and the sound-absorbing layer assembly surface is not annularly divided by the fixing component mounting portion.

2. The sound absorbing structure according to claim 1, characterized in that: The surface of the rear housing is provided with a mounting surface corresponding to the grip housing, and the mounting surface is sunken relative to the surface of the rear housing; The assembly surface is connected with the surface of the rear housing via a transition surface.

3. The sound absorbing structure according to claim 2, characterized in that: The portion where the transition surface is located is constructed as a limiting portion on the inner wall surface of the rear casing, and the area between the limiting portion and the opening end on the inner wall surface of the rear casing forms the sound-absorbing layer assembly surface, and the sound-absorbing layer is attached to the sound-absorbing layer assembly surface, one side of the sound-absorbing layer is in contact with the limiting portion, and the other side extends to the opening end.

4. The sound absorbing structure according to claim 3, characterized in that: The diameter of the rear housing gradually decreases from the opening end to the connection end.

5. The sound absorbing structure according to claim 3, characterized in that: A plurality of supporting ribs are arranged on the assembly surface of the sound-absorbing layer, and the supporting ribs support the back side of the sound-absorbing layer.

6. The sound absorbing structure according to claim 5, characterized in that: The support ribs extend from the limiting portion toward the opening end of the rear housing, and the height of the support ribs increases gradually from the opening end to the limiting portion.

7. The sound absorbing structure according to claim 4, characterized in that: An air inlet cover is provided at the open end of the rear housing, and the air inlet cover is connected to the fixing member mounting portion through a fixing member, and one end of the air inlet cover is in contact with the edge of the sound-absorbing layer.

8. The sound absorbing structure according to claim 1, characterized in that: The sound-absorbing layer is made of sound-absorbing cotton.

9. The sound absorbing structure according to claim 1, characterized in that: A fan is provided at the connection end of the rear casing.

10. A garden blower, characterized in that: The invention comprises the sound-absorbing structure as described in any one of claims 1 to 9.

Images