Filter dust removal device and power tools

Abstract

The present invention discloses a filtering dust removal device and an electric tool. The filtering dust removal device is used for dust removal of the electric tool. The filtering dust removal device is installed in the housing of the electric tool. The interior of the housing is provided with an air duct, which extends in the axial direction of the housing. The filtering dust removal device comprises a filter element, which is arranged in the interior of the housing and extends in the radial direction of the housing. The interior of the filter element is provided with an air inlet channel extending in its length direction. The side of the housing is provided with an air inlet, which is connected with the air inlet channel. The outer peripheral surface of the filter element is provided with filter holes, and the number of the filter holes is multiple. The multiple filter holes are arranged on the outer peripheral surface of the filter element at intervals along the length direction of the filter element. The air duct is connected with the air inlet channel through the filter holes. The filter element of the filtering dust removal device is arranged in the interior of the housing along the radial direction of the housing. The filter holes are arranged on the outer peripheral surface of the filter element, which are arranged away from the surface of the housing. Wind can flow to the middle of the housing through the filter holes on the filter element, thereby improving the heat dissipation effect in the housing.

Description

Technical Field

[0001] The invention relates to a filtering dust removal device and an electric tool. Background Art

[0002] like Figure 1 As shown, the filter 101 of the power tool is usually set on the outer surface of the casing. When the power tool is in use or placed, dust on the hands or dust in the workplace is easy to adhere to the filter 101, resulting in increased air intake resistance, poor heat dissipation effect, and the risk of burning and failure. The filter 101 of some power tools cannot be disassembled. Regardless of whether high-pressure air is blown or brushed, some dust will be blown into the inside of the machine, which is not conducive to cleaning. The filter 101 of some power tools can be cleaned by disassembly. Although the filter 101 can be cleaned, some users find it cumbersome to disassemble the filter 101 or do not have the disassembly tools, resulting in untimely cleaning and damage to the machine.

[0003] like Figure 2 As shown in FIG. 1 , a power tool in which a part of the filter screen 101 is disposed on the side of the housing, the wind enters from the side of the housing, and then turns 90° to flow along the wind duct on the inner wall of the housing, which is not conducive to the cooling of the electronic components disposed in the middle area 102 of the housing cavity. The wind flows in the direction 300′ as shown in FIG. Figure 2 Some power tools have the filter 101 disposed at the rear end of the housing. Although the wind can flow in the direction of the middle area 102 of the housing, the wind inlet at the rear makes the wind duct longer and the wind loss greater, resulting in low wind speed and poor heat dissipation effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the filter of the electric tool is arranged on the surface of the casing, resulting in poor heat dissipation effect, and to provide a filtering dust removal device and an electric tool.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A filtering dust removal device, which is used for dust removal of electric tools, the filtering dust removal device is installed in the shell of the electric tool, the interior of the shell is provided with an air duct, and the air duct extends along the axial direction of the shell, the filtering dust removal device includes a filter element, the filter element is arranged in the interior of the shell and extends along the radial direction of the shell, the interior of the filter element is provided with an air inlet channel extending along its length direction, the side of the shell is provided with an air inlet, and the air inlet is connected with the air inlet channel, the outer peripheral surface of the filter element is provided with filter holes, the number of the filter holes is plural, and the plurality of filter holes are arranged on the outer peripheral surface of the filter element at intervals along the length direction of the filter element, and the air duct is connected with the air inlet channel through the filter holes.

[0007] In this solution, the filter element of the filtering dust removal device is arranged inside the housing along the radial direction of the housing, and the filter holes are arranged on the outer peripheral surface of the filter element, away from the surface of the housing, so that the wind can flow to the middle of the housing through the filter holes on the filter element, thereby improving the heat dissipation effect in the housing. At the same time, the filter holes directly connected to the air duct in the housing are arranged in the filter element, rather than being exposed on the surface of the housing. The external wind first flows into the filter element along the radially arranged air inlet channel, and then changes its flow direction and flows into the housing through the filter holes on the filter element, thereby preventing dust on the hands or dust in the workplace from directly sticking to the filter holes, thereby improving the cleanliness and heat dissipation effect of the filtering device.

[0008] Preferably, the filter element comprises a filter element body and a filter screen, the filter element body is provided with ventilation holes, the filter screen covers the ventilation holes, the filter screen is provided with filter holes, and the aperture of the filter holes is smaller than the aperture of the ventilation holes.

[0009] In this solution, the above structure is adopted, and the filter element body forms a support frame for supporting the filter screen, which is also convenient for replacing or cleaning the filter screen, preventing dust with a particle size larger than the filter hole diameter from entering the housing, and improving the filtering effect of the filter hole. In other alternative solutions, the filter element can also be rolled up by the filter screen.

[0010] Preferably, the filtering and dust removal device further comprises a dust removal unit, the dust removal unit is used to clean the dust on the surface of the filter element, the dust removal unit is installed in the housing, one end of the dust removal unit abuts against the outer peripheral surface of the filter element, and the filter element can rotate around its own axis;

[0011] When the filter element rotates, the dust removal unit covers the area where the filter holes are located.

[0012] In this solution, the dust removal unit is used to clean the dust on the surface of the filter element. The cleaned dust falls into the air inlet channel and is then discharged from the air inlet channel without entering the interior of the housing. At the same time, by rotating the filter element, the dust removal unit can clean all the filter holes on the filter element, avoiding cleaning dead corners and improving the cleaning effect of the filter element.

[0013] Preferably, the dust removal unit is a brush.

[0014] In this solution, the bristles of the brush abut against the surface of the filter element, and the flexibility of the bristles can be used to penetrate deep into the filter holes, thereby improving the cleaning effect.

[0015] Preferably, the brush is arranged above the filter element.

[0016] In this solution, the above-mentioned structural form is adopted, and the dust loosened by the bristles can fall into the air inlet channel by gravity, so as to be collected and discharged from the filter element.

[0017] Preferably, both ends of the filter element extend to the outer surface of the shell, and the air inlet channel runs through one end of the filter element to the other end.

[0018] In this solution, the above structure is adopted, and the external wind can enter the filter element from both ends of the filter element, thereby increasing the air intake and correspondingly improving the heat dissipation effect. When cleaning the dust in the filter element, the dust is discharged from one end of the air inlet channel by wind or a brush from the other end of the air inlet channel, which is simple and convenient to operate.

[0019] Preferably, both ends of the filter element protrude from the surface of the shell.

[0020] In this solution, the above-mentioned structural form is adopted to facilitate hand holding and rotating the filter element.

[0021] Preferably, the outer peripheral surface of the filter element has a limiting flange protruding outwardly extending in the radial direction, and the limiting flanges are arranged at both ends of the filter element. The limiting flanges are used to fix the filter element to the housing.

[0022] In this solution, the above-mentioned structural form is adopted, and the limiting flange is used to fix the filter element on the housing to prevent the filter element from slipping out of the housing.

[0023] Preferably, the shell comprises a main shell, a first sub-shell and a second sub-shell, the main shell, the first sub-shell and the second sub-shell are connected to each other to form the shell, and the filter element is embedded between the first sub-shell and the second sub-shell.

[0024] In this solution, the above-mentioned structural form is adopted, which is convenient for disassembling and assembling the filter element and cleaning the air duct.

[0025] An electric tool comprises a shell and a motor installed in the shell. The electric tool also comprises the filtering and dust removing device as described above. The filtering and dust removing device is arranged in the shell and located between the motor and the rear end of the shell.

[0026] In this solution, the external wind needs to be filtered by the dust filter before entering the housing of the power tool. Since the filter hole is concealed in the filter element instead of being exposed on the surface of the housing, the external wind first flows into the air inlet channel, and then changes its flow direction and flows into the housing through the filter hole on the filter element, which can prevent the dust on the hands or the dust in the workplace from directly sticking to the filter hole, improve the cleanliness of the dust filter, and extend the service life of the power tool. The tail end of the housing is the end away from the output shaft.

[0027] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0028] The positive and progressive effect of the present invention is that the filter element of the filtering dust removal device is arranged inside the housing along the radial direction of the housing, and the filter holes are arranged on the outer peripheral surface of the filter element, away from the surface of the housing, so that the wind can flow to the middle of the housing through the filter holes on the filter element, thereby improving the heat dissipation effect in the housing. At the same time, the filter holes directly connected to the air duct in the housing are concealed in the filter element, rather than exposed on the surface of the housing. The external wind first flows into the filter element along the radially arranged air inlet channel, and then changes its flow direction and flows into the housing through the filter holes on the filter element, thereby preventing dust on the hands or dust in the workplace from directly sticking to the filter holes, thereby improving the cleanliness and heat dissipation effect of the filtering dust removal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the position of the filter screen of the electric tool in the background technology set on the outer surface.

[0030] Figure 2 It is a schematic diagram of the air flow inside the electric tool in the background technology.

[0031] Figure 3 It is a schematic structural diagram of an electric tool according to a preferred embodiment of the present invention.

[0032] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along line AA.

[0033] Figure 5 This is a schematic structural diagram of a filtering and dust removal device from a first perspective of a preferred embodiment of the present invention.

[0034] Figure 6 An exploded view of a filtering and dust removal device according to a preferred embodiment of the present invention.

[0035] Figure 7 This is a schematic structural diagram of a filtering and dust removal device from a second viewing angle according to a preferred embodiment of the present invention.

[0036] Figure 8 It is a schematic structural diagram of a filter element according to a preferred embodiment of the present invention.

[0037] Description of reference numerals:

[0038] BACKGROUND ART REFERENCE NUMBERS

[0039] Filter 101

[0040] Central Area 102

[0041] Wind direction 300'

[0042] Reference numerals of the present invention

[0043] Filter dust removal device 10

[0044] Shell 1

[0045] Air duct 11

[0046] Main shell 12

[0047] First subshell 13

[0048] The second subshell 14

[0049] Mounting holes 15

[0050] Filter 2

[0051] Air inlet channel 21

[0052] Filter body 22

[0053] Ventilation holes 221

[0054] Filter 23

[0055] Filter hole 231

[0056] Limiting flange 24

[0057] Dust removal unit 25

[0058] Axial direction 100

[0059] Radial direction 200

[0060] Wind direction 300 DETAILED DESCRIPTION

[0061] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0062] like Figure 3-Figure 8 As shown, the present embodiment discloses a filtering dust removal device, which is used for dust removal of electric tools. The filtering dust removal device 10 is installed in a housing 1 of the electric tool. The interior of the housing 1 is provided with an air duct 11, which extends along the axial direction 100 of the housing 1. The filtering dust removal device 10 includes a filter element 2, which is arranged in the interior of the housing 1 and extends along the radial direction 200 of the housing 1. The interior of the filter element 2 is provided with an air inlet channel 21 extending along its length direction. The side of the housing 1 is provided with an air inlet, which is connected to the air inlet channel 21. The outer peripheral surface of the filter element 2 is provided with filter holes 231, and the number of the filter holes 231 is multiple. The multiple filter holes 231 are arranged on the outer peripheral surface of the filter element 2 at intervals along the length direction of the filter element 2, and the air duct 11 is connected to the air inlet channel 21 through the filter holes 231.

[0063] In this embodiment, the filter element 2 of the filtering and dust removal device 10 is arranged inside the shell 1 along the radial direction 200 of the shell 1, and the filter holes 231 are arranged on the outer peripheral surface of the filter element 2, away from the surface of the shell 1. The wind can flow to the middle of the shell 1 through the filter holes 231 on the filter element 2, thereby improving the heat dissipation effect in the shell 1. At the same time, the filter holes 231 directly connected to the air duct 11 in the shell 1 are arranged in the filter element 2, rather than being exposed to the surface of the shell 1. The external wind first flows into the filter element 2 along the radially arranged air inlet channel 21, and then changes its flow direction to flow into the shell 1 through the filter holes 231 on the filter element 2. This can prevent dust on the hands or dust in the workplace from directly sticking to the filter holes 231, thereby improving the cleanliness and heat dissipation effect of the filtering and dust removal device. The wind flow direction 300 is as follows Figure 4 As indicated by the arrow in .

[0064] The filter element 2 includes a filter element body 22 and a filter screen 23. The filter element body 22 is provided with a ventilation hole 221, which is in a long strip shape. The filter screen 23 covers the ventilation hole 221. The filter element body 22 forms a support frame for supporting the filter screen 23. The filter screen 23 is provided with a filter hole 231, and the aperture of the filter hole 231 is smaller than the aperture of the ventilation hole 221, so as to prevent dust with a particle size larger than the aperture of the filter hole 231 from entering the housing 1, thereby improving the filtering effect of the filter hole 231. At the same time, the filter screen 23 is also provided to facilitate the replacement or cleaning of the filter element 2. In other embodiments, the filter element can also be rolled up by a filter screen.

[0065] On this basis, the filtering dust removal device 10 further includes a dust removal unit 25, which is used to clean the dust on the surface of the filter element 2. The dust removal unit 25 is installed in the housing 1, and one end of the dust removal unit 25 abuts against the outer peripheral surface of the filter element 2, and the filter element 2 can rotate around its own axis. The dust removal unit 25 is used to clean the dust on the surface of the filter element 2, and the cleaned dust falls into the air inlet channel 21, and then is discharged from the air inlet channel 21, and does not enter the interior of the housing 1.

[0066] By rotating the filter element 2, the dust removal unit 25 can clean all the filter holes 231 on the filter element 2. When the filter element 2 rotates, the dust removal unit 25 covers the area where the filter holes 231 are located, avoiding cleaning dead corners and improving the cleaning effect of the filter element 2.

[0067] In this embodiment, the dust removal unit 25 is a brush, and the bristles of the brush abut against the surface of the filter element 2. The flexibility of the brush can be used to penetrate into the filter hole 231 to improve the cleaning effect. Preferably, the brush is arranged above the filter element 2, so that the dust loosened by the bristles can fall into the air inlet channel 21 by gravity, so as to be collected and discharged from the filter element 2.

[0068] In this embodiment, both ends of the filter element 2 extend to the outer surface of the housing 1, and the air inlet channel 21 runs from one end of the filter element 2 to the other end, so that external wind can enter the filter element 2 from both ends of the filter element 2, thereby increasing the air intake and correspondingly improving the heat dissipation effect. When cleaning the dust in the filter element 2, the dust can be discharged from one end of the air inlet channel 21 by wind or a brush from the other end of the air inlet channel 21, which is simple and convenient to operate.

[0069] In order to facilitate holding and rotating the filter element 2 by hand, both ends of the filter element 2 protrude from the surface of the housing 1 .

[0070] When the filter element 2 is rotated, in order to prevent the filter element 2 from slipping out of the housing 1, a limiting flange 24 extending outward in the radial direction 200 is provided on the outer peripheral surface of the filter element 2. The limiting flange 24 is provided at both ends of the filter element 2, and the limiting flange 24 is used to fix the filter element 2 to the housing 1.

[0071] In order to facilitate the disassembly and assembly of the filter element 2 and the cleaning of the air duct 11, the shell 1 includes a main shell 12, a first sub-shell 13 and a second sub-shell 14. The main shell 12, the first sub-shell 13 and the second sub-shell 14 are connected to each other to form the shell 1, and the filter element 2 is installed between the first sub-shell 13 and the second sub-shell 14 through the installation hole 15.

[0072] like Figure 3 As shown, this embodiment also discloses an electric tool, which includes a housing 1 and a motor installed in the housing 1. The electric tool also includes the above-mentioned filtering and dust removal device 10, which is arranged in the housing 1 and located between the motor and the rear end of the housing 1. The rear end of the housing 1 is the end away from the output shaft of the electric tool. Before the external wind enters the housing 1 of the electric tool, it needs to be filtered by the filtering and dust removal device. Since the filter hole 231 is concealed in the filter element 2 instead of being exposed on the surface of the housing 1, the external wind first flows into the air inlet channel 21, and then changes its flow direction and flows into the housing 1 through the filter hole 231 on the filter element 2, which can prevent dust on the hands or dust in the workplace from directly sticking to the filter hole 231, thereby improving the cleanliness of the filtering and dust removal device and extending the service life of the electric tool.

[0073] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A filtering dust removal device, which is used for dust removal of electric tools, characterized in that: The filtering and dust removing device is installed in the housing of the electric tool, the interior of the housing has an air duct, and the air duct extends in the axial direction of the housing. The filtering and dust removing device includes a filter element, and the filter element is arranged in the interior of the housing and extends in the radial direction of the housing. The interior of the filter element has an air inlet channel extending in its length direction, and the side of the housing has an air inlet, and the air inlet is connected with the air inlet channel. The outer peripheral surface of the filter element is provided with filter holes, and the number of the filter holes is multiple. The multiple filter holes are arranged on the outer peripheral surface of the filter element at intervals along the length direction of the filter element, and the air duct is connected with the air inlet channel through the filter holes; The filter element comprises a filter element body and a filter screen, the filter element body is provided with a ventilation hole, the filter screen covers the ventilation hole, the filter screen is provided with a filter hole, and the aperture of the filter hole is smaller than the aperture of the ventilation hole; The filtering and dust removal device also includes a dust removal unit, which is used to clean the dust on the surface of the filter element. The dust removal unit is installed in the housing, and one end of the dust removal unit abuts against the outer peripheral surface of the filter element. The filter element can rotate around its own axis; When the filter element rotates, the dust removal unit covers the area where the filter hole is located; The dust removal unit is arranged above the filter element; Both ends of the filter element extend to the outer surface of the housing, and the air inlet channel runs through one end of the filter element to the other end; Both ends of the filter element protrude from the surface of the housing; The outer peripheral surface of the filter element is provided with a limiting flange which extends outwardly in a radial direction. Both ends of the filter element are provided with the limiting flange, and the limiting flange is used to fix the filter element to the housing.

2. The filtering and dust removal device according to claim 1, characterized in that: The dust removal unit is a brush.

3. The filtering and dust removal device according to claim 1, characterized in that: The housing comprises a main housing, a first sub-housing and a second sub-housing. The main housing, the first sub-housing and the second sub-housing are connected to each other to form the housing. The filter element is embedded between the first sub-housing and the second sub-housing.

4. An electric tool comprising a housing and a motor installed in the housing, characterized in that: The electric tool further comprises a filtering and dust removing device as claimed in any one of claims 1 to 3, wherein the filtering and dust removing device is arranged in the housing and located between the motor and the rear end of the housing.

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