Electric tool

Abstract

The utility model discloses an electric tool which comprises a shell assembly, an air inlet, a dustproof net and a dust removal assembly. Wherein two shell bodies in the shell assembly are symmetrically arranged, so that a containing space for containing internal equipment of the angle grinder is defined; each shell body is provided with an air inlet which is used as a channel for introducing heat dissipation airflow for reducing the temperature of internal equipment of the angle grinder; heat dissipation airflow generally carries metal dust generated when the angle grinder works or other chippings possibly causing faults of the angle grinder, and therefore a dustproof net is arranged at the air inlet. The dust screen can filter metal dust and chippings in heat dissipation airflow, a dust removal assembly comprising a dust removal fan is arranged on the other air inlet side of the dust screen, namely, the interior of the containing space, and the dust removal fan is arranged towards the dust screen, so that airflow of the dust removal fan flows out from the interior of the containing space; and therefore, metal dust and chippings can be blown and removed from the dustproof net.

Description

Technical Field

[0001] The utility model relates to a power tool, in particular to the technical field of dust removal and heat dissipation equipment for power tools. Background Art

[0002] An angle grinder, also known as an angle polisher, is a handheld power tool that can be used for grinding, cutting, or polishing depending on the accessories. When it works, various metal dusts will be generated, and the angle grinder needs to intake air from the external environment to cool the motor. The metal dusts have an adverse effect on the service life of the motor.

[0003] Therefore, currently, a dust-proof net is set at the air inlet of the angle grinder to block metal dust from entering the internal space of the angle grinder. However, the dust-proof net will be blocked by metal dust during the long-term operation of the angle grinder, reducing the cooling air flow entering the angle grinder, resulting in untimely cooling of the motor and damage. And it is very difficult to clean the dust-proof net from the outside of the angle grinder, which requires disassembling the machine, time-consuming and laborious; although currently, the dust-proof nets of some angle grinders have been replaced with detachable structures (such as Chinese Patent Application CN106625458A), reducing the difficulty of disassembling the machine, but the removed dust-proof net still needs to be treated separately. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a power tool.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] A power tool having a brushless motor, comprising:

[0007] A housing assembly including two symmetrically arranged housing bodies that enclose a containing space;

[0008] An air inlet provided on one side of the housing body;

[0009] A dust-proof net provided at the air inlet and configured to filter the cooling air flow entering the containing space;

[0010] A dust removal assembly provided in the containing space and close to the air inlet, including at least one dust removal fan that blows air towards the dust-proof net;

[0011] The dust removal assembly further includes a controller, and the controller is electrically connected to the dust removal fan and the brushless motor.

[0012] Further, a buckle is provided at the air inlet, and the buckle is movably connected to the dust removal fan.

[0013] Further, a limiting plate is provided at the air inlet, and the limiting plate is located on both sides of the dust removal assembly.

[0014] Further, the air inlet extends partially out of the accommodation space, and the dust removal assembly is partially embedded in the air inlet.

[0015] Further, the dust removal fan is a turbo fan.

[0016] Further, the mesh number of the dust-proof net is 100 - 300 meshes.

[0017] Further, a brushless motor is accommodated in the accommodation space, and the brushless motor is electrically connected to the controller.

[0018] Furthermore, the power tool is an angle grinder.

[0019] Compared with the prior art, in the present utility model, a dust removal assembly is provided at the air inlet, and the dust-proof net at the air inlet is back-blown by the dust removal fan, which can not only avoid excessive dust accumulation on the dust-proof net, but also reduce the inconvenience caused by disassembling the dust-proof net. The controller of the present utility model is electrically connected to the dust removal assembly and the motor, and the dust removal assembly can be set to automatically work after the motor stops rotating for a period of time, which can avoid the cooling air flow not entering the interior of the power tool for heat dissipation during operation, and can also reduce the operation steps of dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 is a schematic structural diagram of the power tool in the embodiment of the present utility model;

[0022] Figure 2 is a front view of the power tool in the embodiment of the present utility model;

[0023] Figure 3 is a schematic structural diagram of the housing body in the embodiment of the present utility model;

[0024] Figure 4 is another schematic structural diagram of the housing body in the embodiment of the present utility model;

[0025] Figure 5 is a front view of the housing body in the embodiment of the present utility model;

[0026] Figure 6 is a top view of the housing body in the embodiment of the present utility model.

[0027] In the figure:

[0028] 1. Housing assembly; 11. Housing body; 2. Air inlet; 21. Buckle; 22. Limiting plate; 3. Dust-proof net; 4. Dust removal assembly; 41. Dust removal fan. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0030] Those skilled in the art can understand that, without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0031] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the following terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0032] As used in this specification, the singular forms "a", "an" and "the" include plural objects, and the plural form "plural" includes more than two objects, unless the content clearly indicates otherwise. As used in this specification, the term "or" is generally used in the sense of including "and / or", unless the content clearly indicates otherwise, and the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components.

[0033] Please refer to Figure 1-6 , the embodiment of the present utility model provides an angle grinder, which includes a housing assembly 1, an air inlet 2, a dust-proof net 3 and a dust removal assembly 4. Among them, the housing assembly 1 is fixedly connected by screws through two housing bodies 11, and the two housing bodies 11 are symmetrically arranged, thus enclosing a accommodation space for accommodating the internal equipment of the angle grinder; each housing body 11 is provided with an air inlet 2 as a channel for introducing a cooling air flow to reduce the temperature of the internal equipment of the angle grinder; and the cooling air flow generally carries metal dust or other debris that may cause malfunctions of the angle grinder generated during the operation of the angle grinder. Therefore, a dust-proof net 3 is arranged at the air inlet 2 in this embodiment.

[0034] The dust-proof net 3 filters metal dust and debris in the heat dissipation airflow when the angle grinder is working. This causes the metal dust and debris to accumulate on the surface and in the gaps of the dust-proof net 3. Therefore, in this embodiment, a dust removal assembly 4 containing two dust removal fans 41 is arranged inside the accommodation space on the other side of the dust-proof net 3 where the air enters. The dust removal fans 41 are arranged facing the dust-proof net 3, so that the airflow direction of the dust removal fans 41 flows outwards from the inside of the accommodation space to blow and remove the metal dust and debris from the dust-proof net 3. In addition, a controller is arranged inside the dust removal assembly 4 in this embodiment, and the controller is electrically connected to the dust removal fans 41. Therefore, in this embodiment, the start and stop of the dust removal fans 41 can be controlled by the controller, effectively improving the practical performance of the reverse blowing system of the dust removal assembly 4. At the same time, a brushless motor is accommodated in the accommodation space. The brushless motor is used to provide a higher rotational speed to improve the working efficiency of the power tool. Among them, the brushless motor is electrically connected to the controller. Therefore, in this embodiment, the dust removal fans 41 can be started a certain time after the brushless motor stops rotating, realizing the automation of cleaning metal dust and debris and reducing the operation time.

[0035] Please refer to Figure 4 、 5 In another embodiment of the present utility model, a buckle 21 is arranged at the air inlet 2. The buckle 21 is movably connected to the dust removal fan 41. The buckle 21 in this embodiment is a hook-shaped cantilever buckle. Therefore, the process of installing the dust removal fan 41 is simple, and it is also relatively convenient to disassemble the dust removal fan 41 from the air inlet 2 for cleaning.

[0036] Please refer to Figure 4 、 5 In another embodiment of the present utility model, limit plates 22 are arranged on both sides of the dust removal assembly 4. The limit plates 22 limit the movement of the dust removal fans 41, preventing displacement due to the vibration generated during the operation of the power tool and affecting the cleaning effect of the dust removal fans 41.

[0037] Please refer to Figure 4-6 In another embodiment of the present utility model, a part of the structure of the air inlet 2 extends outwards from the accommodation space and protrudes from the housing body 11. At the same time, a part of the dust removal assembly 4 is embedded in the air inlet 2. Therefore, only a part of the structure of the dust removal assembly 4 is located inside the accommodation space, avoiding occupying too much space inside the power tool structure.

[0038] Please refer to Figure 4 In another embodiment of the present utility model, the dust removal fan 41 is a turbo fan. The turbo fan can output a larger air volume with a smaller space occupation, improving the heat dissipation effect.

[0039] Please refer to Figure 1 In another embodiment of the present utility model, the mesh number of the dust-proof net 3 is 300 meshes.

[0040] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. An electric tool having a brushless motor, characterized in that, Comprising: A housing assembly, including two symmetrically arranged housing bodies, and the two housing bodies enclose to form an accommodation space; An air inlet, provided on one side of the housing body; A dust-proof net, provided at the air inlet and configured to filter the heat dissipation airflow entering the accommodation space; A dust removal assembly, provided in the accommodation space and close to the air inlet, including at least one dust removal fan that blows air towards the dust-proof net; The dust removal assembly further includes a controller, and the controller is electrically connected to the dust removal fan and the brushless motor.

2. The electric tool according to claim 1, characterized in that: A buckle is provided at the air inlet, and the buckle is movably connected to the dust removal fan.

3. The power tool according to claim 1, wherein: A limiting plate is provided at the air inlet, and the limiting plate is located on both sides of the dust removal assembly.

4. The electric tool according to claim 1, characterized in that: Part of the air inlet extends out of the accommodation space, and part of the dust removal assembly is embedded in the air inlet.

5. The power tool according to claim 1, characterized in that: The dust removal fan is a turbo fan.

6. The power tool according to claim 1, characterized in that: The mesh number of the dust-proof net is 100 - 300 meshes.

7. The electric tool according to claim 1, characterized in that: The power tool is an angle grinder.

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