Electric tool
A dual-layer dustproof structure with varying gap sizes addresses the poor dustproofing issue in electric tools, enhancing dust prevention and ventilation efficiency.
Patent Information
- Application Number
- CN202420536006.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-19
AI Technical Summary
Existing electric tools suffer from poor dustproof effects at heat dissipation vents, allowing external dust to enter and affect internal components due to the vulnerability of current windscreen protections.
A dual-layer dustproof structure comprising a first dustproof net with larger gaps and a second dustproof net with smaller gaps is implemented at the air inlet, providing a two-level filtration system to enhance dustproofing while maintaining ventilation.
The dual-layer filtration system effectively blocks dust entry while ensuring smooth airflow, improving the dustproof effect and extending the life of internal components by secondary filtration.
Smart Images
Figure CN222128718U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of tools, and in particular to an electric tool. Background Art
[0002] Common electric tools are provided with heat dissipation vents at the motor position to discharge the heat generated during the operation of the motor.
[0003] In the prior art, a layer of wind screen is provided at the heat dissipation port to protect the motor, but the protection effect of the wind screen is poor and it is very easy to be damaged. External dust enters the interior of the power tool through the wind screen, which will have an adverse effect on the internal components and operation. Utility Model Content
[0004] In view of this, the purpose of the present disclosure is to provide an electric tool that solves the problem of poor dustproof effect of the windshield net.
[0005] Based on the above-mentioned purpose, the present disclosure provides an electric tool, comprising: a shell having a accommodating cavity for placing a motor; the shell is provided with an air inlet for dissipating heat from the motor; a first dustproof structure and a second dustproof structure are provided at the air inlet, and the first dustproof structure and the second dustproof structure are stacked; the first dustproof structure includes a first dustproof net, and the second dustproof structure includes a second dustproof net, and gaps for air intake are formed in the first dustproof net and the second dustproof net, and the gap in the first dustproof net is larger than the gap in the second dustproof net.
[0006] Optionally, the first dustproof net is a grille, the grille is integrally provided with the shell, and the grille includes a plurality of bars, and the gap is formed between adjacent bars.
[0007] Optionally, the gap between adjacent bars is 1 mm-2 mm.
[0008] Optionally, the second dustproof structure further includes a bracket, and the second dustproof net is supported by the bracket.
[0009] Optionally, the second dustproof structure is detachably connected to the shell.
[0010] Optionally, the bracket includes a first sub-bracket and a second sub-bracket, and the second dustproof net is arranged between the first sub-bracket and the second sub-bracket.
[0011] Optionally, a connecting element is provided on at least one of the first sub-bracket and the second sub-bracket, and a connecting hole is provided on the shell, and the connecting element is interference fit with the connecting hole, so that the first sub-bracket is connected to the shell; or a connecting element is provided on the shell, and connecting holes are provided on the first sub-bracket and the second sub-bracket, and the connecting element is interference fit with the connecting hole, so that the shell is connected to the first sub-bracket and the second sub-bracket.
[0012] Optionally, the second dustproof net includes any one of a woven net, a laser net and a stamped net.
[0013] Optionally, a plurality of mesh holes are arranged on the second dustproof net, and the gaps in the second dustproof net are the apertures of the mesh holes.
[0014] Optionally, the mesh has a pore size of 0.5 mm-0.8 mm.
[0015] From the above description, it can be seen that the electric tool provided by the present disclosure improves the dustproof effect by arranging the stacked first dustproof structure and the second dustproof structure at the air inlet. The gaps in the first dustproof net and the second dustproof net make the ventilation inside the electric tool smooth, and the larger gaps in the first dustproof net and the smaller gaps in the second dustproof net perform secondary filtration on dust, further improving the dustproof effect, and solving the problem of how to improve the dustproof effect while meeting the ventilation and heat dissipation requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 A schematic diagram of an electric tool in an embodiment of the present disclosure Figure 1 ;
[0018] Figure 2 is a partial exploded view of an electric tool in an embodiment of the present disclosure;
[0019] Figure 3 for Figure 2 Detailed view of point A in the middle;
[0020] Figure 4 A schematic diagram of an electric tool according to an embodiment of the present disclosure Figure 2 ;
[0021] Figure 5 for Figure 4 Detailed view of point B in the middle;
[0022] Figure 6 It is a front view of a second dustproof structure according to an embodiment of the present disclosure;
[0023] Figure 7 It is a side view of a second dustproof structure according to an embodiment of the present disclosure.
[0024] Reference numerals:
[0025] 1. Power tool; 100. Housing; 110. Connection hole; 200. Heat dissipation port; 300. First dustproof structure; 310. First dustproof net; 311. Bars; 400. Second dustproof structure; 410. Second dustproof net; 411. Mesh; 420. Bracket; 430. Connecting element. DETAILED DESCRIPTION
[0026] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.
[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0028] The present disclosure provides an electric tool, which may be a lawn mower, a hair dryer, a pruner, an edger or a lawn mower, etc. The electric tool of the present disclosure may also be other types of electric tools that require a motor.
[0029] Taking a lawn mower as an example of an electric tool, a lawn mower is a tool used to mow lawns, vegetation, etc., including a shell and a working module for mowing lawns. The working module includes a motor, a transmission shaft connected to the motor, and a cutting assembly connected to the transmission shaft and arranged at the bottom. The cutting assembly includes a cutter disc and a detachable blade arranged on the cutter disc. The lawn is mowed by the rotation of the cutter disc.
[0030] The motor of the lawn mower drives the transmission shaft and the cutting components. During operation, the motor will generate a certain amount of heat, which needs to be discharged in time to maintain the normal working state of the motor. The air inlet and outlet for discharging the heat of the motor are set on the main unit and connected to the outside world. During the operation of the motor fan, the airflow into the air inlet often brings dust in the air into the inside of the air inlet, especially for electric tools such as lawn mowers. During the mowing process, grass clippings can easily enter the inside of the air inlet after flying, affecting the normal operation of the motor. In the prior art, a layer of wind window net is set at the heat dissipation port to protect the motor, but the protection effect of the layer of wind window net is poor and it is very easy to be damaged. External dust can still enter the inside of the electric tool through the wind window net, which will have an adverse effect on the internal components and operation.
[0031] In order to solve the problem that the current windshield net has a poor dust-proof effect, the present disclosure provides an electric tool, as detailed in the following embodiments.
[0032] See also Figures 1 to 3 As shown, an electric tool 1 is provided in an embodiment of the present disclosure, and the electric tool 1 includes a shell 100, a first dustproof structure 300 and a second dustproof structure 400, and the shell 100 has a accommodating cavity for placing the motor; the shell 100 is provided with an air inlet for dissipating the heat of the motor; the first dustproof structure 300 and the second dustproof structure 400 are provided at the air inlet, and the first dustproof structure 300 and the second dustproof structure 400 are stacked; the first dustproof structure 300 includes a first dustproof net 310, and the second dustproof structure 400 includes a second dustproof net 410, and gaps for air intake are formed in the first dustproof net 310 and the second dustproof net 410, and the gap in the first dustproof net 310 is larger than the gap in the second dustproof net 410.
[0033] Specifically, the motor is placed inside the housing 100, and the air inlet on the housing 100 is used for internal and external air circulation to achieve functions such as heat dissipation. The first dustproof net 310 on the first dustproof structure 300 and the second dustproof net 410 on the second dustproof structure 400 are stacked, and the first dustproof net 310 and the second dustproof net 410 form a two-level filtering structure. The dust outside the housing 100 is isolated outside the housing 100 after being filtered by the two-level filtering structure. The airflow circulates between the inside and outside of the housing 100, which can prevent the entry of large particles of dust while ensuring smooth ventilation inside the power tool 1. The gap of the first dustproof net 310 is larger than the gap of the second dustproof net 410. The size difference between the gap of the first dustproof net 310 and the gap of the second dustproof net 410 improves the dustproof effect. At the same time, the larger size of the first dustproof net 310 performs the first-level filtration of dust, and the smaller size of the second dustproof net 410 performs the second-level filtration of dust, which improves the dustproof effect and extends the life of the key structure inside the tool.
[0034] In one embodiment of the present disclosure, Figure 4 and Figure 5 As shown, the first dustproof net 310 is a grille, which is integrally provided with the housing 100 , and includes a plurality of bars 311 , with gaps formed between adjacent bars 311 .
[0035] Specifically, the bars 311 of the grille are arranged in the same direction at the vents, and the bars 311 are staggered to form gaps. The bar 311 structure of the grille can block the entry of dust, and the gaps between the bars 311 are used for air circulation. The integrated setting of the grille and the shell 100 improves the stability of the grille and reduces the production difficulty and cost.
[0036] In other embodiments, the first dustproof net 310 is detachably connected to the housing 100 , and the first dustproof net 310 and the housing 100 are two separate structures, which are installed together through structural components to facilitate the removal of the grille.
[0037] In other embodiments, the first dustproof net 310 is a honeycomb hole structure, which is used to block the entry of dust and ensure the circulation of airflow; the radial cross-section of the honeycomb hole structure can be circular, triangular or hexagonal, and different radial cross-section shapes are selected according to the circulation requirements or appearance requirements of the airflow to ensure the circulation effect.
[0038] In an embodiment of the present disclosure, the gap between adjacent bars 311 is 1 mm-2 mm.
[0039] Specifically, after testing, the gap range of the first dustproof net 310 with a larger gap is between 1mm and 2mm, which can not only effectively block some impurities in the air, but also does not affect the air intake. In the embodiment in which the bars 311 are a straight-line structure in the same direction, the gap between the bars 311 is 1mm-2mm; in addition, when the first dustproof net 310 is a honeycomb hole structure, the diameter or side length of the honeycomb hole radial section is 1mm-2mm.
[0040] In a specific embodiment, the gap between the bars 311 may be 1 mm, 1.5 mm or 2 mm.
[0041] In one embodiment of the present disclosure, Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the second dustproof structure 400 further includes a bracket 420 , and the second dustproof net 410 is supported by the bracket 420 .
[0042] Specifically, the bracket 420 serves as a frame of the second dustproof net 410, and the second dustproof net 410 is filled in the internal space surrounded by the frame and supported by the bracket 420. The second dustproof net 410 is used to filter smaller particles of dust to prevent them from entering the interior of the housing 100.
[0043] In a specific embodiment, the bracket 420 and the second dustproof net 410 are an integrated structure, so that the complete second dustproof structure 400 has a certain stability and can be produced in one go, thereby simplifying the production process.
[0044] In other embodiments, the second dustproof net 410 is installed on the bracket 420, and the second dustproof net 410 and the bracket 420 are separate structures, which are connected by installation to form a complete second dustproof structure 400, wherein the second dustproof net 410 can be installed on the bracket 420 by screws or glue.
[0045] In a specific embodiment, the bracket 420 is made of metal material or plastic material.
[0046] In an embodiment of the present disclosure, the second dustproof structure 400 is detachably connected to the housing 100 .
[0047] Specifically, the second dustproof structure 400 is a separate component and can be removed from the shell 100. When it is necessary to clean the dust on the second dustproof net 410, the second dustproof structure 400 can be removed and cleaned, which improves the convenience of use. In addition, the second dustproof structure 400 can be replaced after long-term use or damage.
[0048] In a specific embodiment, the first dustproof structure 300 is located on a side close to the inside of the housing 100, and the second dustproof structure 400 is located on a side close to the outside of the housing 100. This facilitates the disassembly of the second dustproof structure 300.
[0049] In an embodiment of the present disclosure, the bracket 420 includes a first sub-bracket and a second sub-bracket, and the second dustproof net 410 is disposed between the first sub-bracket and the second sub-bracket.
[0050] Specifically, the second dustproof net 410 is located in the middle of the bracket 420, and the bracket 420 includes a first sub-bracket and a second sub-bracket. The first sub-bracket and the second sub-bracket are located on both sides of the second dustproof net 410, respectively. The first sub-bracket and the second sub-bracket are respectively located at opposite edges of the second dustproof net 410, and jointly clamp the second dustproof net 410, so that the second dustproof structure 400 forms a grid gap of the second dustproof net 410 that blocks dust and allows air to circulate.
[0051] In one embodiment of the present disclosure, Figure 3 , Figure 5 and Figure 7As shown, a connecting element 430 is provided on at least one of the first sub-bracket and the second sub-bracket, a connecting hole 110 is provided on the shell 100, and the connecting element 430 is interference fit with the connecting hole 110, so that the first sub-bracket is connected to the shell 100; or a connecting element 430 is provided on the shell 100, and a connecting hole 110 is provided on the first sub-bracket and the second sub-bracket 420, and the connecting element 430 is interference fit with the connecting hole 110, so that the shell 100 is connected to the first sub-bracket and the second sub-bracket.
[0052] Specifically, the first sub-bracket and the second sub-bracket are fixed to the housing 100 by using a connecting element 430 and a connecting hole 110. The first sub-bracket and the second sub-bracket are provided with a connecting element 430 protruding toward one side of the housing 100. The housing 100 is provided with a connecting hole 110 at a position corresponding to the first sub-bracket and the second sub-bracket for mounting. When the first sub-bracket and the second sub-bracket are mounted on the bracket 420, the connecting element 430 extends into the connecting hole 110. The inner wall of the connecting hole 110 and the outer wall of the connecting element 430 are interference-fitted. The connecting element 430 is engaged in the connecting hole 110 to achieve the fixing of the first sub-bracket and the second sub-bracket. When the second dustproof structure 400 is disassembled, an external force is used to offset the clamping force of the connecting hole 110 on the connecting element 430, and the second dustproof structure 400 is pulled out. By providing the interference-fit connecting element 430 and the connecting hole 110, the disassembly and assembly process of the second dustproof structure 400 is simplified, and the stability of the second dustproof structure 400 during installation is ensured.
[0053] In a specific embodiment, the connecting element 430 is a protruding columnar body, and the connecting hole 110 is a concave columnar space.
[0054] In an embodiment of the present disclosure, the second dustproof net 410 includes any one of a woven net, a laser net and a stamped net.
[0055] It should be noted that woven mesh is a mesh structure made by a weaving process, usually woven from metal wires, fibers or other materials, with good air permeability and filtering performance. Laser mesh is a mesh structure processed using laser technology. Laser can accurately cut or etch materials to form a mesh structure with high precision. Stamped mesh is a mesh product manufactured by a stamping process, and stamped mesh usually has high strength and stability. Choose mesh structures with different manufacturing methods according to different application scenarios.
[0056] In a specific embodiment, the second dustproof net 410 is made of nylon material or metal material.
[0057] In an embodiment of the present disclosure, a plurality of mesh holes 411 are disposed on the second dustproof net 410 , and the gaps in the second dustproof net 410 are the apertures of the mesh holes 411 .
[0058] Specifically, the mesh structure is cross-arranged to form a plurality of mesh holes 411 , or holes are opened on the plane structure to form a plurality of mesh holes 411 , and the airflow is circulated inside and outside the housing 100 through the mesh holes 411 .
[0059] In a specific embodiment, the shape of the mesh 411 is circular or polygonal.
[0060] In one embodiment of the present disclosure, the aperture of the mesh 411 is 0.5 mm-0.8 mm.
[0061] Specifically, after testing, the second dustproof net 410 with a smaller gap has a gap range of 0.5 mm-0.8 mm, which can better block smaller impurities, or impurities that fall on the grid bars 311 along with the airflow.
[0062] In a specific embodiment, the aperture of the mesh 411 may be 0.5 mm, 0.6 mm or 0.8 mm.
[0063] An electric tool 1 proposed in the present disclosure includes a shell 100 for accommodating a motor, and a vent is opened on the shell 100. A stacked first dustproof structure and a second dustproof structure are arranged at the vent, wherein the second dustproof structure is arranged on the outside relative to the first dustproof structure, and the first dustproof structure is arranged on the inside. The second dustproof structure is a mesh 411 with a smaller gap, which can filter most of the dust. In addition, the second dustproof structure is detachably connected to the shell 100 through a connecting element 430 and a connecting hole 110, which is convenient for replacement and cleaning. The first dustproof structure is a grille structure with a larger gap, which is arranged inside close to the motor, and can cooperate with the second dustproof structure to perform double-layer filtration on the airflow. Since the gap of the first dustproof structure is larger, it will not affect the air intake, and thus the cooling effect can be improved without affecting the filtering effect.
[0064] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.
[0065] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.
Claims
1. An electric tool, characterized in that: include: A housing having a housing for accommodating the motor; The housing is provided with an air inlet for dissipating heat from the motor; The air inlet is provided with a first dustproof structure and a second dustproof structure, and the first dustproof structure and the second dustproof structure are stacked; The first dustproof structure includes a first dustproof net, and the second dustproof structure includes a second dustproof net. Gaps for air intake are formed in the first dustproof net and the second dustproof net, and the gap in the first dustproof net is larger than the gap in the second dustproof net.
2. The electric tool according to claim 1, characterized in that: The first dustproof net is a grille, the grille is integrally arranged with the shell, and the grille includes a plurality of bars, and the gap is formed between adjacent bars.
3. The electric tool according to claim 2, characterized in that: The gap between adjacent bars is 1mm-2mm.
4. The electric tool according to claim 1, characterized in that: The second dustproof structure further includes a bracket, and the second dustproof net is supported by the bracket.
5. The electric tool according to claim 4, characterized in that: The second dustproof structure is detachably connected to the shell.
6. The electric tool according to claim 4 or 5, characterized in that: The bracket includes a first sub-bracket and a second sub-bracket, and the second dustproof net is arranged between the first sub-bracket and the second sub-bracket.
7. The electric tool according to claim 6, characterized in that: At least one of the first sub-bracket and the second sub-bracket is provided with a connecting element, the shell is provided with a connecting hole, the connecting element is interference-fitted with the connecting hole, so that the first sub-bracket is connected to the shell; or The shell is provided with a connecting element, the first sub-bracket and the second sub-bracket are provided with connecting holes, and the connecting element is interference-fitted with the connecting holes, so that the shell is connected with the first sub-bracket and the second sub-bracket.
8. The electric tool according to claim 1, characterized in that: The second dustproof net includes any one of a woven net, a laser net and a punched net.
9. The electric tool according to claim 8, characterized in that: The second dustproof net is provided with a plurality of mesh holes, and the gaps in the second dustproof net are the apertures of the mesh holes.
10. The electric tool according to claim 9, characterized in that: The mesh has a pore size of 0.5 mm to 0.8 mm.