CN112454100A

CN112454100A - Electric tool

Info

Publication number: CN112454100A
Application number: CN201910849691.5A
Authority: CN
Inventors: 马金荣; 丁新祥; 朱云佳
Original assignee: Positec Machinery Zhangjiagang Co ltd
Current assignee: Positec Machinery Zhangjiagang Co ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2021-03-09
Anticipated expiration: 2039-09-09
Also published as: CN112454100B

Abstract

The invention relates to an electric tool, which comprises a shell, a working assembly and a driving assembly, wherein the shell is provided with a cavity, the working assembly is connected with the shell, the driving assembly is arranged in the cavity and is used for driving the working assembly, a wind port is formed in the shell, and the shell also comprises a dustproof cover which is detachably arranged on the wind port; the electric tool further comprises a shell for coating the shell, an injection molding channel for communicating the positioning hole is formed in the shell, and the shell and the flexible mechanism are integrally formed through injection molding of the injection molding channel. The dustproof cover matched with the air opening is arranged to prevent dust and the like from entering the interior of the machine, so that the service life of the brushless angle grinder is prolonged; through being provided with flexible mechanism in the locating hole, and this flexible mechanism and reference column interference fit for the dismantlement of shield and wind gap is more convenient.

Description

Electric tool

Technical Field

The invention relates to an electric tool, and belongs to the technical field of electric tools.

Background

The angle grinder is an electric tool which takes electric power as power and drives a grinding wheel to rotate at a high speed for grinding and cleaning. The internal elements of the angle grinder can generate larger heat in the working process, so that an air opening needs to be formed in the casing to effectively dissipate heat of the electronic elements on the control panel. The angle grinder in the prior art is not provided with the shield matched with the wind gap, or even if the shield is provided, the shield is difficult to be fixedly connected with or detached from the wind gap, so that the later cleaning is inconvenient.

Disclosure of Invention

The invention aims to provide an electric tool which is provided with a dustproof cover and a positioning column connected with the dustproof cover, and a flexible mechanism in interference fit with the positioning column is arranged in a positioning hole arranged around an air port, so that the dustproof cover and the air port are convenient to disassemble, and dust can be prevented from entering a machine.

In order to achieve the purpose, the invention provides the following technical scheme: an electric tool comprises a shell body, a working assembly and a driving assembly, wherein the shell body is provided with a cavity in a surrounding mode, the working assembly is connected with the shell body, the driving assembly is arranged in the cavity and is used for driving the working assembly, an air opening is formed in the shell body, the shell body further comprises a dustproof cover which is detachably installed on the air opening, a positioning hole is formed in the periphery of the air opening, a positioning column matched with the positioning hole is arranged on the dustproof cover, and a flexible mechanism in interference fit with the positioning column is arranged in the positioning hole; the electric tool further comprises a shell for coating the shell, an injection molding channel for communicating the positioning hole is arranged on the shell, and the shell and the flexible mechanism are integrally formed through injection molding of the injection molding channel.

Further, the shell and the flexible mechanism are made of TPE soft rubber.

Further, the shell has an outer surface, the locating hole includes the outer hole that inwards caves in from the outer surface and from the outer hole to the inside sunken hole of shell, the diameter of outer hole is greater than the diameter of inner hole, flexible mechanism sets up in the inner hole.

Furthermore, the inner hole is provided with an inner wall, the flexible mechanism is arranged in a manner of being attached to the inner wall, and the height of the flexible mechanism is smaller than or equal to that of the inner hole.

Furthermore, the dustproof cover and the positioning column are made of plastics.

Furthermore, the positioning columns are arranged on two sides of the dustproof cover along the diagonal line of the dustproof cover.

Furthermore, the dust cover has a hollow part, a first dust screen is arranged in the hollow part, a second dust screen is arranged on the air port, and projections of the first dust screen and the second dust screen in the axial direction of the electric tool are overlapped.

Further, the electric tool is a brushless angle grinder.

Furthermore, the shell comprises a head shell and a shell connected with the head shell, and the working assembly is connected with the head shell.

Furthermore, a holding part is arranged on the peripheral surface of the shell, and the head shell and the air opening are respectively arranged on two sides of the holding part.

The invention has the beneficial effects that: the dustproof cover matched with the air opening is arranged to prevent dust and the like from entering the machine to contact with the driving assembly, so that the service life of the electric tool is prolonged; through being provided with flexible mechanism in the locating hole, and this flexible mechanism and reference column interference fit for the dismantlement of shield and wind gap is more convenient.

The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the electric tool of the present invention with the dust cap and the air port removed.

Fig. 2 is a partial structural schematic view of the electric power tool of the present invention.

Fig. 3 is a schematic structural diagram of the positioning hole, the flexible mechanism and the housing of the present invention.

Fig. 4 is a schematic structural view of the dust cap and the air opening of the electric tool after being installed.

Fig. 5 is a partially enlarged view of the positioning posts and the positioning holes in fig. 4.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without any creative effort, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art.

In addition, the technical features related to the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. In the description of the present invention, the axis direction coincides with the height direction.

Referring to fig. 1 to 5, the electric tool 100 of the present invention can perform operations such as cutting, grinding, brushing, and polishing on a workpiece such as metal or stone, and the electric tool 100 of the present invention can avoid using a carbon brush for conduction, thereby saving energy consumption caused by the carbon brush and facilitating use. The electric tool 100 of the invention can solve the problems of heat dissipation and dust prevention, prevent impurities such as dust and scrap iron generated during the operation of the electric tool 100 from entering the machine, prolong the service life of the electric tool 100, improve the working efficiency of the electric tool 100 and further ensure the reliability of the electric tool 100. Meanwhile, the electric tool 100 of the present invention has a simple structure, and the adopted materials make the electric tool lower in manufacturing cost, reliable in operation and convenient in use.

In the present invention, the electric tool 100 may be a brushless angle grinder, and the brushless angle grinder 100 includes a housing 1 enclosing a cavity, a working component 2 connected to the housing 1, and a driving component 3 disposed in the cavity to drive the working component 2, wherein the housing 1 is used for protection to prevent an operator from touching parts inside the housing when the brushless angle grinder 100 is used, so as to ensure the safety of the operator and improve the safety performance. Meanwhile, the brushless angle grinder 100 can generate dust during operation, the shell 1 can prevent fine impurities such as dust from entering the shell 1, and further prevent impurities such as dust from accumulating on parts inside the shell 1, so that the service life of the brushless angle grinder 100 is prolonged, and the work efficiency of the brushless angle grinder 100 is improved. The housing 1 comprises a head shell 12 and a housing 11 connected with the head shell 12, the working assembly 2 is connected with the head shell 12, in this embodiment, the working assembly 2 is a polishing head 21, the driving assembly 3 comprises a motor 31, and the motor 31 is arranged in the housing 11. The motor 31 is provided with an output shaft, the motor 31 is arranged close to the head shell 12, so that the output shaft penetrates through the head shell 12 to be connected with the polishing head 21 to drive the working head to rotate to realize operations such as cutting, grinding and polishing of the brushless angle grinder 100, the output path of the torque of the motor 31 can be reduced, the loss of the torque in the transmission process is avoided, the output torque of the motor 31 is improved, and the output torque of the brushless angle grinder 100 is ensured. The polishing head 21 is further provided with a protective cover 4 to prevent the operator from being injured by fine particles such as iron chips and dust generated during the operation of the brushless angle grinder 100. The motor 31 provides a power source for the brushless angle grinder 100, so that the brushless angle grinder 100 can normally operate when working, and the brushless angle grinder 100 is ensured to work reliably. The casing 11 is also provided with a switch 7, and the switch 7 is connected with a control component arranged in the cavity and used for starting the motor 31 to work.

An air opening 111 is formed in the casing 11, a holding portion 6 is arranged on the outer peripheral surface of the casing 11, and the head casing 12 and the air opening 111 are respectively arranged on two sides of the holding portion 6. The grip portion 6 is intended to facilitate the grip of an operator when using the brushless angle grinder 100 to facilitate the operation of the brushless angle grinder 100. In the present embodiment, there should be a preset distance between the grip portion 6 and the motor 31 to avoid the motor 31 from being disposed in the grip portion 6. The purpose of this arrangement is: the motor 31 can produce certain heat at the during operation, and the heat can pass through casing 11 and transmit to human hand, and comfort level when influencing operating personnel and using influences user experience. The grip portion 6 is provided with an anti-slip block 61 to enhance the friction force between the hand of the human body and the grip portion 6. The brushless angle grinder 100 further includes an auxiliary handle 5 connected to and used to assist in gripping, so that an operator can more conveniently operate the angle grinder. Similarly, the auxiliary handle 5 is also provided with an anti-slip mechanism 51 to enhance the friction between the human hand and the auxiliary handle 5.

Referring to fig. 1 specifically, the housing 11 further includes a dust cover 112 detachably mounted on the air opening 111, a positioning hole 113 is formed around the air opening 111, a positioning post 1122 matched with the positioning hole 113 is formed on the dust cover 112, and a flexible mechanism 8 in interference fit with the positioning post 1122 is disposed in the positioning hole 113. In this embodiment, the shape of the tuyere 111 is an isosceles trapezoid, and two positioning holes 113 are provided and are respectively disposed on two sides of the tuyere 111 along a diagonal line of the isosceles trapezoid. Indeed, in other embodiments, the shape of the tuyere 111 may be other, and the number of the positioning holes 113 may be other, which is determined according to practical situations and is not limited herein. The two positioning holes 113 are formed in the tuyere 111, the two positioning holes 113 are arranged along the diagonal line, and the installation and fixation effect of the dustproof cover 112 can be achieved, and in terms of casting technology, the two positioning holes 113 can reduce the production and injection molding difficulty. Correspondingly, only two positioning columns 1122 are arranged on the dust cover 112, the shape of the dust cover 112 is matched with that of the air opening 111, and the positioning columns 1122 are arranged on two sides of the dust cover 112 along the diagonal line of the dust cover 112.

Referring to fig. 4, the dust-proof cover 112 has a hollow portion, a first dust-proof mesh 1111 is disposed in the hollow portion, a second dust-proof mesh 1121 is disposed on the air opening 111, and projections of the first dust-proof mesh 1111 and the second dust-proof mesh 1121 on the axial direction of the brushless angle grinder 100 overlap. In this embodiment, the first dust-proof net 1111 and the second dust-proof net 1121 are both steel wire nets to better block fine particles such as iron filings. Indeed, in other embodiments, the first dust-proof mesh 1111 and the second dust-proof mesh 1121 may be made of other materials for the purpose of blocking fine particles such as iron filings without being damaged. The first dust-proof and second dust-proof meshes 1121 may have a stripe shape, a mesh shape, or other shapes, and are not particularly limited as the case may be.

Referring to fig. 3 and 5, the housing 11 has an outer surface 114, and the positioning hole 113 includes an outer hole 1131 recessed from the outer surface 114 and an inner hole 1132 recessed from the outer hole 1131 to the inside of the housing 11, so that the dust cap 112 is better matched with the air port 111, and the whole brushless angle grinder 100 is more beautiful. In this embodiment, the diameter of the outer bore 1131 is greater than the diameter of the inner bore 1132, and the compliant mechanism 8 is disposed within the inner bore 1132. Indeed, in other embodiments, the diameter of the outer bore 1131 may be smaller than the diameter of the inner bore 1132, and is not particularly limited as the case may be. The inner hole 1132 has an inner wall, the flexible mechanism 8 is disposed to abut against the inner wall, and the height of the flexible mechanism 8 is less than or equal to the height of the inner hole 1132. In this embodiment, the height of the flexible mechanism 8 is slightly smaller than the height of the inner hole 1132, so that the positioning pillar 1122 can be better inserted into the positioning hole 113. Indeed, in other embodiments, the height of the flexible mechanism 8 may be equal to or greater than the height of the inner hole 1132, and is not limited in any way. More specifically, the height of the outer hole 1131 is smaller than the height of the inner hole 1132, so that the positioning column 1122 is more firmly inserted into the positioning hole 113 and is not easy to loosen.

The brushless angle grinder 100 further includes a housing 13 covering the housing 11, and in the present embodiment, the housing 13 covers the periphery of the tuyere 111. Indeed, in other embodiments, the housing 13 may cover the entire casing 11 or other parts, and is not limited herein according to the actual situation. The casing 11 is provided with an injection channel 9 for communicating with the positioning hole 113, and the housing 13 and the flexible mechanism 8 are integrally injection-molded through the injection channel 9. In order to make the injection process of the flexible mechanism 8 easier, the injection channel 9 is arranged close to the positioning hole 113, so that the length of the injection channel 9 is shortened. The injection molding channel 9 is linear inside the casing 11 and is communicated with the bottom of the positioning hole 113, and indeed, the injection molding channel 9 may also be communicated with other parts of the positioning hole 113, which is determined according to practical situations and is not specifically limited herein. In this embodiment, the housing 13 and the flexible mechanism 8 are made of TPE soft rubber, and the dust-proof cover 112 and the positioning column 1122 are made of plastic, which is thermoplastic plastic, specifically PA6, and has a low cost and a high hardness. And the material of flexible mechanism 8 is the TPE flexible glue for interference fit between reference column 1122 and the locating hole 113 is better, and when needs are dismantled dust-proof cover 112 from wind gap 111, reference column 1122 also more easily roll-off to outside locating hole 113, reaches and dismantles convenient effect.

In summary, the following steps: the dustproof cover 112 matched with the air opening 111 is arranged to prevent dust and the like from entering the interior of the machine, so that the service life of the brushless angle grinder 100 is prolonged;

the flexible mechanism 8 is arranged in the positioning hole 113, and the flexible mechanism 8 is in interference fit with the positioning column 1122, so that the dust cover 112 and the air port 111 are more convenient to disassemble;

the manufacturing material of the dust cover 112 is changed into plastic PA6, so that the manufacturing cost is saved, the positioning column 1122 on the dust cover 112 can be better matched with the flexible mechanism 8, and the dust cover 112 and the air port 111 can be more conveniently detached and installed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electric tool comprises a shell body, a working assembly and a driving assembly, wherein the shell body is provided with a cavity in a surrounding mode, the working assembly is connected with the shell body, the driving assembly is arranged in the cavity and used for driving the working assembly, an air opening is formed in the shell body, the shell body further comprises a dustproof cover which is detachably mounted on the air opening, and the electric tool is characterized in that positioning holes are formed in the periphery of the air opening, positioning columns matched with the positioning holes are arranged on the dustproof cover, and flexible mechanisms in interference fit with the positioning columns are arranged in the positioning holes; the electric tool further comprises a shell for coating the shell, an injection molding channel for communicating the positioning hole is arranged on the shell, and the shell and the flexible mechanism are integrally injection molded through the injection molding channel.

2. The power tool of claim 1, wherein the housing and the flexible mechanism are made of TPE soft rubber.

3. The power tool of claim 1, wherein said housing has an outer surface, said positioning aperture comprising an outer aperture recessed inwardly from said outer surface and an inner aperture recessed inwardly from said outer aperture into said housing, said outer aperture having a diameter greater than a diameter of said inner aperture, said flexible mechanism being disposed within said inner aperture.

4. The power tool of claim 3, wherein the internal bore has an internal wall, the flexible mechanism being disposed against the internal wall, the flexible mechanism having a height less than or equal to a height of the internal bore.

5. The power tool of claim 1, wherein the dust cap and the positioning post are made of plastic.

6. The power tool of claim 1, wherein the positioning posts are disposed on opposite sides of the dust cover along a diagonal of the dust cover.

7. The electric tool according to claim 1, wherein the dust cover has a hollow portion, a first dust screen is provided in the hollow portion, a second dust screen is provided on the air port, and projections of the first dust screen and the second dust screen in an axial direction of the electric tool overlap each other.

8. The power tool of claim 1, wherein the power tool is a brushless angle grinder.

9. The power tool of claim 8, wherein the housing includes a head housing and a housing coupled to the head housing, the working assembly being coupled to the head housing.

10. The electric power tool as claimed in claim 9, wherein a grip portion is provided on an outer peripheral surface of the housing, and the head housing and the air vent are respectively provided on both sides of the grip portion.