Angle grinder
By designing dust collection components in the angle grinder, including the dust collection body and ventilation mechanism, the problem of cooling airflow carrying dust into the motor assembly is solved, and efficient dust collection and extending the life of the motor assembly is achieved.
Patent Information
- Application Number
- CN202421793151.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-26
AI Technical Summary
During the operation of existing angle grinders, dust carried by cooling airflow is easily entered into the motor assembly, resulting in a shortening of the service life of the motor assembly and the existing metal filter cannot effectively intercept fine dust.
An angle grinder with a dust collecting assembly is designed. The dust collecting assembly includes a dust collecting body and a ventilation mechanism. The cooling air flow enters the dust collecting body through the air inlet. After passing through the first dust collecting mechanism and the ventilation mechanism, the dust is effectively adsorbed and collected to prevent entering the motor assembly.
It effectively improves dust collection efficiency, reduces the probability of dust entering the motor assembly, extends the service life of the motor assembly, and provides convenient dust emission methods, improving user experience.
Smart Images
Figure CN222903534U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power tools, and particularly relates to an angle grinder with a dust collection assembly. Background Art
[0002] An angle grinder is a power tool that uses a motor assembly to provide a power source to drive a transmission assembly to drive a working wheel for grinding operations. Because of its convenient carrying and high working efficiency, it is highly favored by users. However, during the operation of the angle grinder, external cooling airflows are inhaled through a fan, and these cooling airflows often carry the dust generated by the angle grinder operation into the machine interior. If the dust is adsorbed onto the motor assembly, it is likely to shorten the service life of the motor assembly, and in severe cases, cause the motor assembly to fail.
[0003] Regarding the dust prevention problem, existing angle grinders often add a metal filter screen at the air inlet to block dust from entering. However, the metal filter screen can only intercept dust with larger sizes and cannot intercept dust smaller than the mesh diameter. Therefore, a considerable amount of fine dust will still enter the motor assembly.
[0004] In view of this, it is necessary to provide an improved angle grinder to overcome the defects existing in the prior art. Summary of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an angle grinder with a dust collection assembly, which has the advantages of high dust collection efficiency and good user experience.
[0006] The utility model solves the problems of the prior art by adopting the following technical scheme: An angle grinder includes a housing, the housing has a cylindrical part for accommodating a motor assembly and a handle unit for the user to hold, the handle unit is connected to the cylindrical part, the angle grinder includes a dust collection assembly connected to the handle unit and a first dust collection mechanism accommodated in the dust collection assembly, the dust collection assembly has an air inlet for introducing external cooling airflows and a ventilation mechanism for discharging external cooling airflows, a flow path of the cooling air is formed between the air inlet and the ventilation mechanism, the first dust collection mechanism is located in the flow path, and the ventilation mechanism is connected and communicated with the interior of the housing.
[0007] A further improvement scheme is: the dust collection assembly has a dust collection main body, the first dust collection mechanism is accommodated in the dust collection main body, the air inlet is located on the circumferential end face of the dust collection main body, and the ventilation mechanism is located on the upper wall surface of the dust collection main body.
[0008] A further improvement scheme is: a positioning table is provided on the inner wall of the dust collection main body, the first dust collection mechanism is supported on the positioning table, and the first dust collection mechanism is located above the air inlet.
[0009] A further improvement solution is that the first dust collection mechanism is made of HEPA.
[0010] A further improvement solution is that a dust collection cover is connected to the lower end of the dust collection main body, and the dust collection cover houses a second dust collection mechanism.
[0011] A further improvement solution is that the second dust collection mechanism is made of sponge.
[0012] A further improvement solution is that the second dust collection mechanism is located below the air inlet.
[0013] A further improvement solution is that the dust collection assembly is connected to the handle unit. The handle unit has a first part connected to the ventilation mechanism. The first part has a through first through groove and a second through groove spaced from the first through groove. The ventilation mechanism has a first ventilation part and a second ventilation part spaced from each other. The first ventilation part passes through the first through groove, and the second ventilation part passes through the second through groove.
[0014] A further improvement solution is that the first part has a first limiting part provided at the end of the first through groove and a second limiting part provided at the end of the second through groove. The first ventilation part has a first ventilation duct integrally connected to the dust collection main body and a first positioning rib extending from the end of the first ventilation duct. The second ventilation part has a second ventilation duct integrally connected to the dust collection main body and a second positioning rib extending from the end of the second ventilation duct. The first positioning rib is supported by the first limiting part, and the second positioning rib is supported by the second limiting part.
[0015] A further improvement solution is that the cross-sectional area of the first dust collection mechanism is not less than the cross-sectional area of the dust collection main body.
[0016] Compared with the prior art, the utility model has the following beneficial effects: A dust collection assembly is installed on the lower side of the handle unit of the angle grinder, which can effectively collect the dust carried in the cooling air and reduce the probability of dust entering the motor assembly. Specifically: An air inlet is opened on the circumferential wall surface of the dust collection main body, and a ventilation mechanism is opened on the upper wall surface of the dust collection main body. A flow path for the cooling air flow is formed between the air inlet and the ventilation mechanism, and the cross-sectional area of the first dust collection mechanism is not less than that of the dust collection main body. In this way, the flow path of the cooling air flow is completely covered by the first dust collection mechanism. When the cooling air flow passes through the first dust collection mechanism, most of the fine dust is adsorbed by the first dust collection mechanism, effectively preventing the fine dust from entering the motor assembly; A dust collection cover is arranged below the dust collection main body, and a second dust collection mechanism is installed in the dust collection cover. When the cooling air flow passes through the first dust collection assembly, the relatively large-sized dust will be blocked by the first dust collection mechanism and settle on the second dust collection mechanism under the action of gravity, effectively collecting the dust and preventing it from re-entering the working environment and causing cyclic hazards; The dust collection cover and the dust collection main body, the first dust collection mechanism and the dust collection main body, and the second dust collection mechanism and the dust collection cover are all detachably connected to each other. In this way, it is also more convenient for users to discharge dust, and the experience is better. [Description of the Drawings]
[0017] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings:
[0018] Figure 1 is a three-dimensional schematic diagram of the angle grinder in the present utility model;
[0019] Figure 2 is Figure 1 an exploded schematic diagram of the handle unit and the dust collection assembly in the shown angle grinder;
[0020] Figure 3 is Figure 1 a cross-sectional view of the handle unit and the dust collection assembly shown;
[0021] Figure 4 is Figure 2 a structural schematic diagram of the dust collection main body and the ventilation mechanism in the shown dust collection assembly;
[0022] Figure 5 is Figure 2 a partial enlarged view of the first part in the shown handle unit;
[0023] Figure 6 is Figure 3 an enlarged view of the shown dust collection assembly.
[0024] The meanings of the reference numerals in the drawings:
[0025] Angle grinder 100, housing 1
[0026] Cylindrical part 11, Handle unit 12
[0027] First half shell 12A, 12, Second half shell 12B
[0028] First part 121, First through groove 121a
[0029] Second through groove 121b, First limiting part 121c
[0030] Second limiting part 121d, Second part 122
[0031] Gear box 13, Top tool 2
[0032] Protective cover 3, Dust collection assembly 4
[0033] Dust collection main body 41, Positioning table 41a
[0034] Air inlet 42, Ventilation mechanism 43
[0035] First ventilation part 431, First ventilation duct 431a
[0036] First positioning rib 431b, Second ventilation part 432
[0037] Second ventilation duct 432a, Second positioning rib 432b
[0038] Dust collection cover 44, Dust collection cavity 441
[0039] First dust collection mechanism 45, Second dust collection mechanism 46
[0040] Flow path P [Specific embodiments]
[0041] 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 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 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 should not be construed as a limitation to the present utility model.
[0042] Please refer to Figure 1, an embodiment of the present utility model relates to a angle grinder 100 for grinding and cutting workpieces such as metals and stones. The housing 1 of the angle grinder 100 has a three-section structure, including a cylindrical part 11 for accommodating a motor assembly (not shown), a handle unit 12 for the user to hold, and a gearbox 13 for accommodating a transmission assembly (not shown). The motor assembly can drive the transmission assembly to operate so as to drive the top tool 2 at the lower end of the gearbox 13 to operate on the workpiece. The top tool 2 can be a cutting disc or a grinding disc.
[0043] If the angle grinder 100 operates under incorrect conditions, there may be a risk of rupture of the top tool 2. If the broken metal fragments fly onto the user, it is easy to cause harm to the user. Therefore, a protective cover 3 needs to be provided on the outside of the top tool 2. The protective cover 3 is preferably a quick-change type, so that the user does not need tools when replacing the protective cover 3, and the operation is simple and time-saving.
[0044] Please refer to Figure 2 , in the front-rear direction, the handle unit 12 is covered by a symmetrically arranged first half shell 12A and a second half shell 12B. In the left-right direction, the handle unit 12 is composed of a first part 121 and a second part 122. The first part 121 is cylindrical and is connected to the rear end of the cylindrical part 11. The second part 122 is the part held by the user and is integrally formed with the first part 121.
[0045] During the actual working process of the angle grinder 100, the operation of the motor assembly will drive the front-end fan (not shown) to operate together to suck in the cooling air flow. However, this part of the cooling air flow often carries a large amount of dust. If the dust is adsorbed by the motor assembly and accumulates to a certain amount, the angle grinder 100 will not be able to work. Therefore, in this embodiment, a dust collection assembly 4 is provided on the lower side of the first part of the handle unit 12.
[0046] Please refer to Figures 2 to 6 , the dust collection assembly 4 includes a dust collection main body 41 and a dust collection cover 44. The dust collection cover 44 is detachably connected to the lower part of the dust collection main body 41. The dust collection main body 41 is a hollow square box shape, and its lower part is open and can communicate with the outside. Long strip-shaped air inlets 42 penetrate through the four circumferential wall surfaces of the dust collection main body 41, so as to ensure that the cooling air flow enters the dust collection main body 41 in a flat cluster shape, which is beneficial to converging the cooling air flow and improving the air intake efficiency. The dust collection cover 44 is also a hollow square box shape, and its upper part is open, and its dimensions in the front-rear and left-right directions are equal to those of the dust collection main body 41.
[0047] Combined with Figure 4, the dust collection main body 41 is provided with a ventilation mechanism 43 on its upper wall surface. Specifically, the ventilation mechanism 43 includes a first ventilation part 431 and a second ventilation part 432 which are arranged at intervals. The first ventilation part 431 is composed of a first ventilation duct 431a and a first positioning rib 431b arranged at the end of the first ventilation duct 431a. The second ventilation part 432 is composed of a second ventilation duct 432a and a second positioning rib 432b arranged at the end of the second ventilation duct 432a. The first ventilation duct 431a and the second ventilation duct 432a are respectively communicated with the inside of the dust collection main body 41; among them, the cross-sectional area of the first ventilation duct 431a needs to be larger than that of the second ventilation duct 432a, and the first positioning rib 431b extends in an arc shape, while the second positioning rib 432b extends straight, which will be described in detail below.
[0048] Go to Figure 5 , the first part 121 has a first through groove 121a and a second through groove 121b. The first through groove 121a extends in an arc shape, and the second through groove 121b extends straight. Moreover, the area of the first through groove 121a is larger than that of the second through groove 121b. It can be found that the shape and size settings between the first through groove 121a and the second through groove 121b are the same as those of the first ventilation part 431 and the second ventilation part 432. This is because the inner wall surface of the first part 121 is almost entirely curved in the left-right direction, and the flat surface is only integrated in a small section of the left side area. As the main place for the housing 1 to communicate with the outside, the area of the first through groove 121a needs to be as large as possible. Therefore, the first through groove 121a inevitably presents an arc shape and naturally occupies the vast majority of the inner wall area of the first part 121. The second through groove 121b can only be integrated in the smaller flat area on the left side of the first part 121. This is also the reason why the first positioning rib 431b is arc-shaped and the second positioning rib 432b is straight-shaped.
[0049] Furthermore, a first limiting part 121c and a second limiting part 121d are respectively opened in the first through groove 121a and the second through groove 121b. The fixation of the dust collection main body 41 relative to the first part 121 can be realized by the mutual abutment of the first positioning rib 431b and the first limiting part 121c, and the second positioning rib 432b and the second limiting part 121d. In this embodiment, if only one component, the first ventilation part 431, is provided, there will be only one connection between the dust collection main body 41 and the first part 121, which is not conducive to the installation of the dust collection main body 41. Therefore, two components, the first ventilation part 431 and the second ventilation part 432, need to be opened.
[0050] Please combine Figure 2 , Figure 3 and Figure 6, on the left and right inner walls of the dust collection main body 41, there protrudes a positioning platform 41a formed as a slender thin plate. The length of the positioning platform 41a in the front-rear direction is equal to or slightly less than the length of the dust collection main body 41 in the front-rear direction. At the same time, the width of the positioning platform 41a in the left-right direction should be maintained at a relatively small value so as not to affect the air intake effect of the air inlet 42. Moreover, there is a certain space between the positioning platform 41a and the inner top wall of the dust collection main body 41 in the up-down direction, and this space is used to place the first dust collection mechanism 45.
[0051] The first dust collection mechanism 45 is made of HEPA and is square as a whole. The areas of its upper side and lower side are not less than the area of the inner top wall of the dust collection main body 41. It should be noted that the lower end surface of the first dust collection mechanism 45 should be located at the upper end of the air inlet 42; a second dust collection mechanism 46 is also provided directly below the first dust collection mechanism 45. The second dust collection mechanism 46 is made of sponge and is housed in the dust collection cavity 441 formed inside the dust collection cover 44. Moreover, the second dust collection mechanism 46 is also square, and the areas of its upper wall and lower wall are not less than the bottom area of the dust collection cover 44.
[0052] When the angle grinder 100 is working, the external cooling air flow first enters the dust collection main body 41 from the air inlet 42, then flows upward through the first dust collection mechanism 45, and finally enters the handle unit 12 through the first ventilation duct 431a and the second ventilation duct 432a, and then can flow inside the angle grinder 100; the path through which the cooling air flow passes from the air inlet 42 to the ventilation mechanism 43 is defined as the flow path P, and the first dust collection mechanism 45 is completely within the flow path. That is to say, all the cooling air flow will pass through the first dust collection mechanism 45. In this way, the smaller dust in the cooling air flow can be adsorbed by the first dust collection mechanism 45, and the larger-sized dust will settle into the second dust collection mechanism 46 inside the dust collection cover 44 under the action of gravity when it collides with the first dust collection mechanism 45.
[0053] In this embodiment, through the adsorption effect of the first dust collection mechanism 45 and the collection effect of the second dust collection mechanism 46, in addition to greatly reducing the probability of dust entering the angle grinder 100, the dust can also be collected in the dust collection assembly 4 to prevent it from floating back into the air to cause repeated hazards; when the user discharges the dust, only need to stop the angle grinder 100, open the dust collection cover 44 and remove the first dust collection mechanism 45 and the second dust collection mechanism 46 for dumping, which is convenient, fast and has a good experience.
[0054] The present utility model is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that without departing from the principles and scope of the present utility model, there are many alternative solutions for the angle grinder of the present utility model. The protection scope of the present utility model shall be subject to the content of the claims.
Claims
1. An angle grinder, comprising a housing, wherein the housing has a cylindrical portion for accommodating a motor assembly and a handle unit for a user to hold, wherein the handle unit is connected to the cylindrical portion; characterized in that: The angle grinder includes a dust collecting assembly connected to the shell and a first dust collecting mechanism accommodated in the dust collecting assembly, the dust collecting assembly has an air inlet for introducing external cooling airflow and a ventilation mechanism for exhausting external cooling airflow, a flow path for cooling air is formed between the air inlet and the ventilation mechanism, the first dust collecting mechanism is located in the flow path, and the ventilation mechanism is connected to the interior of the shell.
2. The angle grinder according to claim 1, characterized in that: The dust collecting assembly comprises a dust collecting body, the first dust collecting mechanism is accommodated in the dust collecting body, the air inlet is located at the circumferential end surface of the dust collecting body, and the ventilation mechanism is located at the upper wall surface of the dust collecting body.
3. The angle grinder according to claim 2, characterized in that: The inner wall of the dust collecting body is provided with a positioning platform, the first dust collecting mechanism is supported on the positioning platform, and the first dust collecting mechanism is located on the upper side of the air inlet.
4. The angle grinder according to claim 3, characterized in that: The first dust collecting mechanism is made of HEPA.
5. The angle grinder according to claim 4, characterized in that: The lower end of the dust collecting body is connected with a dust collecting cover, and the dust collecting cover accommodates a second dust collecting mechanism.
6. The angle grinder according to claim 5, characterized in that: The second dust collecting mechanism is made of sponge.
7. The angle grinder according to claim 6, characterized in that: The second dust collecting mechanism is located at the lower side of the air inlet.
8. The angle grinder according to claim 4, characterized in that: The dust collecting assembly is connected to the handle unit, and the handle unit has a first part connected to the ventilation mechanism, the first part has a first through groove and a second through groove spaced apart from the first through groove, and the ventilation mechanism has a first ventilation part and a second ventilation part spaced apart from each other, the first ventilation part is penetrated through the first through groove, and the second ventilation part is penetrated through the second through groove.
9. The angle grinder according to claim 8, characterized in that: The first part has a first limiting portion arranged at the end of the first through groove and a second limiting portion arranged at the end of the second through groove, the first ventilation portion has a first ventilation duct integrally connected to the dust collecting body and a first positioning rib extending from the end of the first ventilation duct, the second ventilation portion has a second ventilation duct integrally connected to the dust collecting body and a second positioning rib extending from the end of the second ventilation duct, the first positioning rib is supported by the first limiting portion, and the second positioning rib is supported by the second limiting portion.
10. The angle grinder according to claim 4, characterized in that: The cross-sectional area of the first dust collecting mechanism is not less than the cross-sectional area of the dust collecting body.