Casing assembly and electric tool

Abstract

The utility model discloses a machine shell assembly and an electric tool, the machine shell assembly comprises a shell and a wind shielding piece, a cavity is formed in the shell, and the cavity is used for containing an electric appliance assembly. An air inlet window is formed in the shell, and the purpose of cooling the electric appliance assembly is achieved. The air inlet window is divided into a first partition and a second partition, the first partition faces the shielding part of the electric appliance assembly in the air inlet direction, and the second partition faces the exposed part of the electric appliance assembly in the air inlet direction. The air blocking piece comprises a grating arranged at an interval with the air inlet window in the air inlet direction, the grating and the first subarea are at least partially staggered in the air inlet direction, and the grating and the second subarea are at least partially overlapped in the air inlet direction. According to the utility model, the air inlet window at the first subarea is basically not shielded by the grating, the air flow directly blows the shielding part, the heat dissipation efficiency is improved, the air inlet window at the second subarea is shielded by the grating, the deposition of dust on the exposed electric appliance component is reduced, the working efficiency of the electric appliance component is effectively improved, and the service life of the electric appliance component is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically to a housing assembly and a power tool. Background Technology

[0002] Power tools typically contain electrical components such as control panels. To dissipate heat from these components, the housing usually needs air intakes. Airflow enters the housing through these intakes to cool the electrical components. However, dust and other impurities also enter the housing with the airflow, accumulating on the electrical components and negatively impacting their efficiency and lifespan. Therefore, existing technologies typically incorporate dustproof structures at the air intakes to mitigate these issues.

[0003] However, an improperly designed dustproof structure can lead to reduced ventilation efficiency, resulting in insufficient heat dissipation of electrical components and even malfunctions. Therefore, how to rationally design dustproof and ventilation structures to ensure heat dissipation while reducing dust accumulation is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0004] The present invention aims to provide a housing assembly and power tool that can effectively improve ventilation efficiency and enhance the heat dissipation of electrical components while preventing dust.

[0005] To solve the above-mentioned technical problems, this utility model provides a housing assembly, comprising:

[0006] A housing having a cavity for accommodating electrical components, the housing having an air inlet window communicating with the cavity and the outside, the air inlet window having a first section and a second section, the first section being positioned towards a shielding portion of the electrical components in the air inlet direction, and the second section being positioned towards an exposed portion of the electrical components in the air inlet direction; and...

[0007] A wind deflector includes a grille spaced apart from the air inlet window in the air inlet direction, the grille and the air inlet window defining an air inlet gap, so that airflow introduced from the air inlet window changes direction through the air inlet gap and enters the cavity, the grille being at least partially offset from the first partition in the air inlet direction, and the grille being at least partially overlapping with the second partition in the air inlet direction.

[0008] Optionally, the air inlet window includes a plurality of air inlets at least partially located within the second partition, and the grille is correspondingly disposed on at least one side of the plurality of air inlets in the air intake direction.

[0009] Optionally, each of the air inlets extends along a first direction, and the plurality of air inlets are spaced apart in a second direction. Multiple grilles are provided, each of the grilles extends along the first direction, the plurality of grilles are spaced apart in the second direction, and are provided in one-to-one correspondence with the plurality of air inlets.

[0010] Optionally, the plurality of air inlets include a first air inlet located entirely within the second partition, and the grilles corresponding to the first air inlet are fixed to the housing at both ends in a first direction.

[0011] Optionally, the plurality of air inlets include a second air inlet partially located within the second partition, and the grille provided corresponding to the second air inlet is fixed to the housing on one side in the second direction, and at least covers the portion of the second air inlet that overlaps with the second partition.

[0012] Optionally, the housing assembly further includes a dust cover, which is disposed on the outside of the air inlet window, and the wind deflector is disposed on the inside of the air inlet window.

[0013] Optionally, the dust cover includes a frame and a filter screen, the frame being detachably connected to the housing, and the filter screen being integrally formed with the frame.

[0014] Optionally, the housing has two air inlets, which are arranged opposite each other in the air intake direction. There are two wind deflectors, which are arranged in a one-to-one correspondence with the two air inlets.

[0015] Optionally, the windshield is integrally formed with the housing.

[0016] To solve the above-mentioned technical problems, this utility model also provides an electric tool, comprising:

[0017] Housing assembly, said housing assembly being any one of the housing assemblies described above; and,

[0018] An electrical assembly is disposed in the cavity. The electrical assembly includes a mounting box and an electrical component. The electrical component is mounted in the mounting box and is at least partially exposed from inside the mounting box. The outer side of the mounting box constitutes the shielding portion, and the portion of the electrical component exposed in the mounting box constitutes the exposed portion.

[0019] The technical solution provided by this utility model has the following advantages:

[0020] The housing assembly provided by this utility model mainly includes a housing and a wind deflector. A cavity is formed inside the housing to house the electrical components of the power tool. An air inlet is provided on the housing to introduce airflow into the cavity, thereby cooling the electrical components. The air inlet is divided into a first section and a second section. The first section faces the portion of the electrical components that is obstructed in the airflow direction, and the second section faces the exposed portion of the electrical components in the airflow direction. The wind deflector includes a grille spaced apart from the air inlet in the airflow direction. An air inlet gap is defined between the grille and the air inlet, allowing airflow introduced from the air inlet to change direction and enter the cavity after passing through the air inlet gap. The grille is at least partially offset from the first section in the airflow direction, and at least partially overlaps with the second section in the airflow direction.

[0021] In the embodiments provided by this utility model, the airflow to the first zone is largely unobstructed by the grille and air inlet window, allowing the airflow to smoothly reach the obstructed parts and effectively cool the poorly heated parts of the electrical components. Dust is also less likely to accumulate at the air inlet window, causing blockage and improving heat dissipation efficiency. Conversely, the airflow to the second zone is effectively guided by the overlapping grille and air inlet window, preventing direct impact on exposed parts and reducing dust deposition on electrical components. On one hand, the air inlet window in the first zone is largely unobstructed by the grille, ensuring sufficient ventilation and allowing airflow to fully enter the cavity and directly blow on the less efficient obstructed parts, thus improving the overall heat dissipation efficiency of the electrical components. On the other hand, the air inlet window in the second zone, with its grille obstruction, reduces the probability of direct airflow onto exposed parts of the electrical components, reducing dust deposition and effectively improving the working efficiency and service life of the electrical components. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A three-dimensional structural diagram of an embodiment of the power tool provided by this utility model;

[0024] Figure 2 for Figure 1 A three-dimensional structural diagram of a Chinese power tool, in which some housing components are not shown;

[0025] Figure 3 for Figure 1A front view of a power tool;

[0026] Figure 4 for Figure 3 Sectional view at point AA;

[0027] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0028] Figure 6 for Figure 1 Exploded view of the three-dimensional structure of the central casing components;

[0029] Figure 7 for Figure 6 A three-dimensional structural diagram of the inner side of the middle casing assembly;

[0030] Figure 8 for Figure 6 A three-dimensional structural diagram of the dust cover;

[0031] Figure 9 for Figure 8 A three-dimensional exploded view of the dust cover.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Power tool; 100-House assembly; 10-House; 11-Cavity; 12-Air inlet; 121-First partition; 122-Second partition; 13-Air inlet; 131-First air inlet; 132-Second air inlet; 20-Wind deflector; 21-Grate; 30-Dust cover; 31-Frame; 32-Filter; 200-Electrical assembly; 201-Mounting box; 202-Radiator; 203-Shielding part; 204-Exposed part; 300-Output end. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] Please see Figures 1 to 9 This utility model provides a housing assembly 100 and a power tool 1 including the same. Please refer to [link / reference]. Figure 1 and Figure 2The power tool 1 provided by this utility model is mainly a handheld power tool 1, such as an angle grinder, grooving machine, electric drill, etc. The power tool 1 mainly consists of a housing assembly 100, an electrical assembly 200, a drive assembly, and an output end 300. The housing assembly 100 constitutes the main body of the power tool 1, mainly used to assemble the various parts of the power tool 1, serving to support and protect the parts. The material of the housing assembly 100 is not limited, but generally lightweight and high-strength plastic is used. In this embodiment, a handle is also assembled or formed on the housing assembly 100 for easy gripping by the user. The housing assembly 100 includes a shell 10, and the shell 10 has a cavity 11 formed inside.

[0037] The electrical component 200 includes electrical elements, including but not limited to power supply devices and control devices. It is generally housed together with the drive component in the cavity 11. The output end 300 is mounted on the housing component 100. Its specific type is not limited; depending on the type of power tool 1, it can be a rotatable cutting disc, drill bit, etc. When the power tool 1 is working, the control device controls the drive component to drive the output end 300 to move. Preferably, the electrical component may include electrical elements (not shown) and a heat sink 202. The electrical elements, which serve as the control circuit, generally have high heat dissipation requirements due to their operating characteristics. In some prior art, the electrical elements and the heat sink 202 are encapsulated in a mounting box 201 for easy integration and installation. However, this design has poor heat dissipation efficiency and is prone to failure due to high temperatures, thus affecting the service life of the power tool 1.

[0038] Because in this embodiment, please refer to Figure 2 The electrical assembly 200 has a shielding portion 203 and an exposed portion 204. Specifically, the electrical assembly 200 includes a mounting box 201 and the aforementioned electrical components. Optionally, the electrical components and the heat sink 202 are mounted in the mounting box 201 and are at least partially exposed from within the mounting box 201. This structure facilitates the installation of the electrical assembly 200 and improves heat dissipation efficiency. In a specific design, electrical components sensitive to dust and impurities can be placed in the portion shielded by the mounting box 201, especially in a location within the mounting box 201 where dust is less likely to accumulate. Electrical components less affected by dust and impurities, and the heat sink 202, can be placed in the exposed portion of the mounting box 201, thereby improving heat dissipation efficiency.

[0039] In this embodiment, the outer wall of the mounting box 201 forms a shielding portion 203, and the portion of the electrical components (including electrical elements and heat sink 202) exposed outside the mounting box 201 forms an exposed portion 204. To further improve the heat dissipation efficiency of the electrical component 200, an air inlet 12 is also provided on the housing 10, connecting the cavity 11 and the outside. The air inlet 12 introduces airflow into the cavity 11 to cool the electrical component 200. The air inlet 12 is generally located near the electrical component 200 to effectively dissipate heat from the electrical component 200, which has high heat dissipation requirements.

[0040] In this embodiment, please continue to refer to the following: Figures 3 to 6 The air inlet 12 can be divided into a first section 121 and a second section 122. The first section 121 faces the shielding part 203 of the electrical component 200 in the air inlet direction, and the second section 122 faces the exposed part 204 of the electrical component 200 in the air inlet direction. It should be noted that in this utility model, the air inlet direction refers to the direct direction of the airflow introduced by the air inlet 12, which mainly depends on the relative position between the air inlet 12 and the electrical component 200. If the air inlet 12 itself is a conventional opening, the air inlet direction is basically perpendicular to the surface where the air inlet 12 is located. In this embodiment, the first section 121 facing the shielding part 203 of the electrical component 200 in the air inlet direction means that the airflow introduced from the first section 121 blows directly onto the shielding part 203 without any other shielding or guiding measures. The second section 122 facing the exposed part 204 of the electrical component 200 in the air inlet direction means that the airflow introduced from the second section 122 blows directly onto the exposed part 204 without any other shielding or guiding measures.

[0041] It is understandable that this direct airflow method can easily lead to dust accumulation on electrical components, which in turn adversely affects the service life and operating efficiency of the electrical assembly 200. It should be noted that in this embodiment, the air inlet 12 is not limited to including only the first partition 121 and the second partition 122; it can also include other partitions that do not directly blow air onto the electrical assembly 200. Furthermore, the size of the partitions is not fixed. For example, if the area of ​​the shielding part 203 of the electrical assembly 200 is relatively large, the area of ​​the first partition 121 can be designed to be larger to better block dust; if the exposed part 204 has high heat dissipation requirements, the area of ​​the second partition 122 can be appropriately increased.

[0042] For further information, please refer to [link / reference]. Figures 4 to 7The housing assembly 100 also includes a wind deflector 20, which includes grilles 21 spaced apart from the air inlet window 12 in the air intake direction. The grilles 21 can have various shapes and structures, their main function being to define an air intake gap between themselves and the air inlet window 12, allowing airflow from the air inlet window 12 to change direction before entering the cavity 11. In other words, the grilles 21 on the wind deflector 20 are spaced apart from the air inlet window 12, and the space between them is the air intake gap. When airflow is introduced into the air intake gap, the grilles 21, by blocking and guiding it, change its direction, preventing it from directly blowing onto electrical components directly opposite the grilles 21, thus reducing the risk of dust and impurities accumulating there. The material selection for the grilles 21 is also important. Metal grilles 21 are high-strength, not easily deformed, and can better withstand the impact of airflow; moreover, metal has good thermal conductivity, which helps with heat dissipation to some extent. Plastic grilles 21 are lighter, have relatively lower costs, and can be manufactured into various complex shapes through injection molding and other processes.

[0043] There are many ways to fix the grille 21 to the housing 10, such as welding or screwing. Preferably, the wind deflector 20 and the housing 10 are integrally formed. Most preferably, the wind deflector 20 and the housing 10 are integrally injection molded. This design reduces the number of components, eliminating the need for separate assembly of the wind deflector 20 and the housing 10, thus avoiding potential errors during assembly. Secondly, integral molding improves the overall strength and stability of the housing assembly 100. This manufacturing method also improves production efficiency and reduces production costs because it reduces assembly steps, shortens production time, and correspondingly lowers costs.

[0044] like Figure 4 and Figure 5As shown, the grille 21 is at least partially offset from the first partition 121 in the air intake direction, and at least partially overlaps with the second partition 122 in the air intake direction. Preferably, the grille 21 is completely offset from the first partition 121 in the air intake direction, and the grille 21 is substantially overlaps with the second partition 122 in the air intake direction. That is, the airflow introduced into the chamber from the first partition 121 blows directly onto the shielding part 203 inside the chamber, while the airflow introduced from the second partition 122 is shielded by the grille 21 and no longer blows directly onto the exposed part 204. Specifically, the airflow flowing towards the first partition 121 does not substantially obstruct the air intake window 12 because the grille 21 is offset from the air intake window 12, allowing the airflow to smoothly blow onto the shielding part 203, effectively cooling the shielding part 203 in the electrical component 200 which has poor heat dissipation performance. Dust is also less likely to accumulate at the air intake window 12 and cause blockage, thus improving heat dissipation efficiency. The airflow flowing towards the second zone 122 can be effectively guided to change direction because the grille 21 overlaps with the air inlet window 12, so that the airflow will not directly impact the exposed part 204, reducing the accumulation of dust on electrical components and reducing the adverse effects of dust accumulation on electrical components 200.

[0045] The advantages of this embodiment are as follows: On the one hand, the air inlet window 12 at the first partition 121 is basically unobstructed by the grille 21, ensuring ventilation and allowing airflow to fully enter the cavity 11 and directly blow on the shielded part 203 with low heat dissipation efficiency, thereby improving the overall heat dissipation efficiency of the electrical component 200. On the other hand, the air inlet window 12 at the second partition 122 is shielded by the grille 21, reducing the probability of airflow directly blowing on the exposed part 204, reducing dust accumulation on the exposed electrical components, and effectively improving the working efficiency and service life of the electrical component 200.

[0046] Please continue to refer to the following: Figure 6 and Figure 7 The air inlet window 12 includes a plurality of air inlets 13, at least partially located within the second partition 122, and a grille 21 is correspondingly disposed on at least one side of the plurality of air inlets 13 in the air intake direction. In this embodiment, the air inlet window 12 is composed of a plurality of air inlets 13, at least a portion of which are located within the second partition 122. The grille 21 is disposed on at least one side of the plurality of air inlets 13 in the air intake direction, meaning that the grille 21 can be disposed on the inner or outer side of the air inlet window 12 as needed. A grille 21 designed on the inner side makes the outer surface of the housing 10 smoother and more aesthetically pleasing, and less prone to damage from bumps and knocks, while a grille 21 designed on the outer side is easier to clean. In this embodiment, the grille 21 is disposed on the inner side of the air inlets 13. The grille 21 is disposed corresponding to the plurality of air inlets 13. It can be that one grille 21 corresponds to multiple air inlets 13, or multiple grilles 21 are disposed one-to-one with multiple air inlets 13, preferably the latter, to increase the ventilation area and improve heat dissipation efficiency.

[0047] In this embodiment, the design of multiple air inlets 13 increases the ventilation area, allowing more airflow to enter the cavity 11 and improving ventilation volume. At the same time, it prevents the air inlet window 12 from being too large, which would prevent the housing 10 from adequately protecting the internal electrical components 200. The grille 21 acts as a barrier, preventing dust from being directly blown onto the electrical components by the airflow, reducing the likelihood of dust damage. Simultaneously, keeping the air inlets 13 open allows for continuous airflow, achieving good heat dissipation.

[0048] The shape of the air inlet 13 can be designed according to actual needs. In this embodiment, please refer to the following: Figure 6 and Figure 7 Each air inlet 13 extends along the first direction, and the multiple air inlets 13 are spaced apart in the second direction. Multiple grilles 21 are provided, each grille 21 extends along the first direction, the multiple grilles 21 are spaced apart in the second direction, and are provided in a one-to-one correspondence with the multiple air inlets 13.

[0049] In this embodiment, the first direction and the second direction are determined based on the specific structure and layout of the housing. The first direction and the second direction intersect, preferably perpendicular to each other. Air inlets 13 extend along the first direction, forming parallel air ducts. Multiple air inlets 13 are spaced apart along the second direction. This layout allows airflow to enter the cavity 11 more evenly. Multiple grilles 21 also extend along the first direction and correspond one-to-one with the air inlets 13, spaced apart along the second direction. This arrangement ensures that each air inlet 13 has a corresponding grille 21 to guide airflow. This makes airflow guidance more precise, allowing airflow to enter the cavity 11 more evenly while maximizing the ventilation area.

[0050] Furthermore, such as Figure 6 and Figure 7 As shown, the plurality of air inlets 13 includes a first air inlet 131 completely located within the second partition 122. A grille 21 corresponding to the first air inlet 131 is fixed to the housing 10 at both ends in the first direction. Specifically, one type of air inlet 13, the first air inlet 131, is completely within the second partition 122. This means it primarily provides cooling airflow to the exposed portion 204 of the electrical component 200. The grille 21 corresponding to the first air inlet 131 is fixed to the housing 10 at both ends in the first direction. Thus, both sides of the grille 21 are open, thereby maximizing the ventilation area and improving heat dissipation efficiency while ensuring the strength of the grille 21. Figure 7As shown, both ends of the grille 21 are provided with connecting arms extending correspondingly to both ends of the first air inlet 131. These connecting arms are part of the wind deflector 20 and are preferably integrally formed with the grille 21 and the housing 10. In this way, the grille 21 at the first air inlet 131 is fixed through a simple structure, which is easy to manufacture and has a good dustproof effect.

[0051] Please continue reading. Figure 6 and Figure 7 Optionally, the plurality of air inlets 13 include a second air inlet 132 partially located within the second partition 122. A grille 21 corresponding to the second air inlet 132 is fixed to the housing 10 on one side in the second direction and at least covers the portion of the second air inlet 132 that overlaps with the second partition 122. The second air inlet 132 is another type of air inlet 13, and it is partially located within the second partition 122. The grille 21 corresponding to it is fixed to the housing 10 on one side in the second direction and must ensure that it at least covers the portion of the second air inlet 132 that overlaps with the second partition 122. The size of the area covered by the grille 21 can be adjusted according to the actual situation. Completely covering the overlapping portion can block dust to the greatest extent. Appropriately exceeding the overlapping portion can not only increase the strength of the grille but also further enhance the dustproof effect. Specifically, the connection between the grille 21 and the housing 10 can be fixed by extending a connecting arm on one side of the grille 21 in the length direction. This connecting arm is part of the windbreak 20 and is preferably integrally formed with the grille 21 and the housing 10, which serves to ensure the strength of the grille 21 at the second air inlet 132.

[0052] The second air inlet 132, located in the second partition 122, allows airflow to enter through it. Guided by the grille 21, this airflow effectively dissipates heat from both the exposed portion 204 of the electrical component 200 and the shielded portion 203. The grille 21 is fixed to the housing 10 on one side, ensuring its stability and allowing it to guide the airflow from the second air inlet 132, thus blocking dust. This design satisfies the heat dissipation requirements of different parts of the electrical component 200 while achieving excellent dust prevention.

[0053] Based on the above embodiments, optionally, please refer to the following: Figure 6 , Figure 8 and Figure 9The housing assembly 100 also includes a dust cover 30, which covers the outside of the air inlet window 12, while the wind deflector 20 is disposed on the inside of the air inlet window 12. In this embodiment, the dust cover 30 is disposed on the outside of the air inlet window 12, forming a double protection together with the wind deflector 20. When outside air enters, it first passes through the filter 32 of the dust cover 30, which filters out most of the dust. Then the airflow passes through the grille 21 of the wind deflector 20, which further blocks the dust and guides the airflow into the cavity 11. This double protection structure greatly improves the dustproof effect, effectively reducing the amount of dust entering the cavity 11 and protecting the electrical components 200. Moreover, it also reduces the accumulation of dust on the grille 21, allowing maintenance to be performed by cleaning only the dust cover 30, which is convenient. The material of the filter 32 can be selected as different mesh sizes of metal mesh or fiber mesh as needed.

[0054] Preferably, the dust cover 30 includes a frame 31 and a filter 32. The frame 31 is detachably connected to the housing 10, and the filter 32 is integrally formed with the frame 31. In this embodiment, the frame 31 and the housing 10 of the dust cover 30 are connected by a detachable method, such as a snap-fit ​​connection, a magnetic connection, or a threaded connection, to facilitate disassembly and cleaning. The filter 32 and the frame 31 are integrally formed, which ensures the installation stability of the filter 32 and facilitates the cleaning of the filter 32. Preferably, the filter 32 and the frame 31 are injection molded as inserts.

[0055] The number of air inlets 12 can be selected as needed. Based on the above embodiments, please refer to [reference needed]. Figure 3 and Figure 4 Preferably, the housing 10 has two air inlets 12, which are arranged opposite to each other in the air intake direction. Two wind deflectors 20 are provided, each corresponding to one of the two air inlets 12. In this embodiment, airflow can enter the cavity 11 from two opposite directions, forming convection. The air flows faster within the cavity 11, further improving ventilation efficiency and allowing more air to circulate within the cavity 11, carrying away more heat.

[0056] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A housing assembly, characterized in that, include: A housing having a cavity for accommodating electrical components, the housing having an air inlet window communicating with the cavity and the outside, the air inlet window having a first section and a second section, the first section being positioned towards a shielding portion of the electrical components in the air inlet direction, and the second section being positioned towards an exposed portion of the electrical components in the air inlet direction; and... A wind deflector includes a grille spaced apart from the air inlet window in the air inlet direction, the grille and the air inlet window defining an air inlet gap, so that airflow introduced from the air inlet window changes direction through the air inlet gap and enters the cavity, the grille being at least partially offset from the first partition in the air inlet direction, and the grille being at least partially overlapping with the second partition in the air inlet direction.

2. The housing assembly as claimed in claim 1, characterized in that, The air inlet window includes a plurality of air inlets at least partially located within the second partition, and the grille is correspondingly disposed on at least one side of the plurality of air inlets in the air intake direction.

3. The housing assembly as described in claim 2, characterized in that, Each of the air inlets extends along a first direction, and the plurality of air inlets are spaced apart in a second direction. Multiple grilles are provided, each of the grilles extending along the first direction and the plurality of grilles spaced apart in the second direction, and are provided in one-to-one correspondence with the plurality of air inlets.

4. The housing assembly as claimed in claim 3, characterized in that, The plurality of air inlets include a first air inlet located entirely within the second partition, and the grilles corresponding to the first air inlet are fixed to the housing at both ends in a first direction.

5. The housing assembly as described in claim 3, characterized in that, The plurality of air inlets include a second air inlet partially located within the second partition, and the grille provided corresponding to the second air inlet is fixed to the housing on one side in the second direction, and at least covers the portion of the second air inlet that overlaps with the second partition.

6. The housing assembly as claimed in claim 1, characterized in that, The housing assembly also includes a dust cover, which is disposed on the outside of the air inlet window, and the wind deflector is disposed on the inside of the air inlet window.

7. The housing assembly as claimed in claim 6, characterized in that, The dust cover includes a frame and a filter screen, the frame being detachably connected to the housing, and the filter screen being integrally formed with the frame.

8. The housing assembly as claimed in any one of claims 1 to 7, characterized in that, The housing has two air inlets, which are arranged opposite each other in the air intake direction. There are two wind deflectors, which are arranged in a one-to-one correspondence with the two air inlets.

9. The housing assembly as claimed in any one of claims 1 to 7, characterized in that, The windshield is integrally formed with the housing.

10. A power tool, characterized in that, include: A housing assembly, wherein the housing assembly is the housing assembly as described in any one of claims 1 to 9; as well as, An electrical assembly is disposed in the cavity. The electrical assembly includes a mounting box and an electrical component. The electrical component is mounted in the mounting box and is at least partially exposed from inside the mounting box. The outer side of the mounting box constitutes the shielding portion, and the portion of the electrical component exposed in the mounting box constitutes the exposed portion.

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