CN112117866B - Power Tools - Google Patents
Power Tools Download PDFInfo
- Publication number
- CN112117866B CN112117866B CN202010898529.5A CN202010898529A CN112117866B CN 112117866 B CN112117866 B CN 112117866B CN 202010898529 A CN202010898529 A CN 202010898529A CN 112117866 B CN112117866 B CN 112117866B
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- CN
- China
- Prior art keywords
- air
- fan
- motor
- accommodating
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Cooling System (AREA)
- Portable Power Tools In General (AREA)
Abstract
The invention discloses an electric tool which comprises a shell, a motor and a circuit board, wherein the motor and the circuit board are contained in the shell, the shell is provided with a plurality of air inlets and a plurality of air outlets, the circuit board is electrically connected with the motor and drives the motor to operate, a first fan and a second fan are respectively arranged at two axial ends of the motor and drive the first fan and the second fan to rotate, the first fan introduces air flow from one air inlet and discharges the air flow from one air outlet after flowing through the motor to form a first cooling air channel, the second fan is introduced from the other air inlet and discharges the air flow from the other air outlet after flowing through the circuit board to form a second cooling air channel, and the first cooling air channel and the second cooling air channel are mutually independent and isolated. And the motor and the circuit board are cooled respectively by adopting two fans, so that the cooling effect is enhanced.
Description
[ Field of technology ]
The invention relates to the field of electric tools, in particular to a cutting type electric tool.
[ Background Art ]
A cooling air duct is arranged in the traditional electric tool to cool the motor so as to prevent the motor from being too high in temperature. In addition, in order to achieve miniaturization, the connecting wire between the motor and the switch is changed into the circuit board, and the circuit board generates heat due to the operation of the electric tool, so that the circuit board needs to be cooled while the motor is cooled.
Referring to chinese patent publication No. CN104114335B, there is disclosed a portable electric cutting machine, the portable electric circular saw including a centrifugal fan fixed to an output shaft of a motor, which is rotated by the motor, and cools the motor by a fan air flow generated by the rotation, a circuit board having cooling air holes formed on a housing, an air flow path communicating between a motor housing and an outer wall of the housing being provided between a back surface of the fan guide and an outer wall of the housing, a negative pressure inside the fan guide caused by the rotation of the fan, and cooling air flowing through the circuit board from the cooling air holes to the inside of the fan guide. However, the portable electric cutting machine cools the motor and the circuit board simultaneously through a single fan, and the air flow originally used for independently cooling the motor is divided into two parts, so that a good heat dissipation effect cannot be achieved on the motor or the circuit board, and the service life of a product is influenced.
Therefore, there is a need to design a new power tool that addresses the cooling effects of equipment within the tool.
[ Invention ]
In order to solve the above problems, the present invention provides an electric tool having an improved cooling effect.
The electric tool comprises a shell, a motor and a circuit board, wherein the motor and the circuit board are accommodated in the shell, the shell is provided with a plurality of air inlets and a plurality of air outlets, the circuit board is electrically connected with the motor and drives the motor to operate, a first fan and a second fan are respectively arranged at two axial ends of the motor and drive the first fan and the second fan to rotate, the first fan introduces air flow from one air inlet, discharges air from one air outlet after flowing through the motor to form a first cooling air channel, the second fan is introduced from the other air inlet, discharges air from the other air outlet after flowing through the circuit board to form a second cooling air channel, and the first cooling air channel and the second cooling air channel are mutually independent and separated.
The shell is provided with a first accommodating part for accommodating the motor and a second accommodating part for accommodating the circuit board, the first cooling air channel flows through the first accommodating part, and the second cooling air channel flows through the second accommodating part.
The air inlet comprises a first air inlet communicated with the first accommodating part and a second air inlet communicated with the second accommodating part, the air outlet comprises a first air outlet communicated with the first accommodating part and a second air outlet communicated with the second accommodating part, the air flow of the first cooling air duct flows into the first accommodating part through the first air inlet and flows through the motor in the first accommodating part, then the first air outlet is used for discharging the first accommodating part, and the air flow of the second cooling air duct flows into the second accommodating part through the second air inlet and flows through the circuit board in the second accommodating part and then is discharged out of the second accommodating part through the second air outlet.
The second containing part further comprises a wind shielding ring positioned on the right side of the motor and a cover plate attached to the right end of the wind shielding ring, an inner cavity is formed by surrounding the cover plate and the wind shielding ring, the inner cavity contains a second fan, a gap is formed in the radial direction of the second fan in the inner cavity, and the gap forms the second air outlet.
The second containing part is further provided with a pipeline which extends along the outer side wall of the first containing part and is integrally formed with the first containing part, the pipeline and the internal cavity are communicated with each other to form the second cooling air channel, and the first air inlet is arranged on the outer ring at the right end of the cover plate.
The air deflector is characterized in that an outer cavity is formed in the outer periphery of the air deflector and the outer periphery of the cover plate, inner annular walls isolating the inner cavity from the outer cavity are arranged on the air deflector and the cover plate, and the outer cavity and the first accommodating part form the first cooling air duct.
The second fan is a discrete fan, and the second air outlet is arranged below the inner cavity and inclines towards the rotation direction of the discrete fan.
The second containing part further comprises a cover plate positioned at the right end of the first containing part, an inner cavity is formed in the periphery of the cover plate and the right side wall of the first containing part, and the second fan is contained in the inner cavity.
The second accommodating part is further provided with a pipeline which extends along the outer side wall of the first accommodating part and is integrally formed with the first accommodating part, and the pipeline is communicated with the inner cavity to form the second cooling air channel.
The cover plate is provided with an outer cavity positioned at the periphery of the cover plate and an inner annular wall for isolating the outer cavity from the inner cavity, the first air inlet is arranged at the periphery of the cover plate and communicated with the outer cavity, the second air inlet is positioned at the middle part of the cover plate and communicated with the inner cavity, and the outer cavity and the first accommodating part form the first cooling air duct.
The electric tool is an electric circular saw, the electric circular saw comprises a bottom plate, and the shell is connected to the bottom plate.
The electric tool comprises a shell, a motor and a circuit board, wherein the shell is provided with a first accommodating part for accommodating the motor and a second accommodating part for accommodating the circuit board, the first accommodating part is provided with a first air inlet and a first air outlet, the second accommodating part is provided with a second air inlet and a second air outlet, the circuit board is electrically connected with the motor and drives the motor to operate, a first fan and a second fan are respectively arranged at two axial ends of the motor, the first fan forms airflow to flow in the first accommodating part, the second fan forms airflow to flow in the second accommodating part, and the first accommodating part and the second accommodating part are not communicated.
The further improvement is that the airflow direction in the first accommodating part is parallel to at least part of the paths of the airflow direction in the second accommodating part.
Compared with the prior art, the electric tool has the advantages that the first fan and the second fan are respectively arranged at the two axial ends of the motor, the first fan introduces air flow to cool the motor and form the first cooling air channel, the second fan introduces air flow to cool the circuit board driving the motor and form the second cooling air channel, the first cooling air channel and the second cooling air channel are mutually independent and isolated, the air flow throughput in each air channel is improved, the air flow in the cooling air channels is prevented from streaming or splitting, the cooling effect on the motor and the circuit board is improved, and the service life of the electric tool is further prolonged.
[ Description of the drawings ]
FIG. 1 is a perspective view of a first embodiment of the power tool of the present invention;
FIG. 2 is a perspective view of the right housing of FIG. 1 with the right housing removed;
FIG. 3 is a partially exploded view of FIG. 1;
FIG. 4 is a schematic view in partial cutaway of FIG. 1;
fig. 5 is a schematic view, partially in section, of a second embodiment of the power tool of the present invention.
[ Detailed description ] of the invention
Specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples, in which embodiments of the present power tool are described in detail by way of example only with reference to an electric circular saw.
Referring to fig. 1 to 4, a first embodiment of an electric tool 100 according to the present invention includes a housing 1, a bottom plate 7 supporting the housing 1, a motor 2 and a transmission assembly accommodated in the housing 1, a saw blade fixedly connected to the transmission assembly, and a circuit board 3. The shell 1 is connected to the bottom plate 7, the output direction of the electric circular saw is defined as the left, and the shell 1 comprises a left shell 19, a right shell 12 covered with the left shell 19 and a gear box 11 fixed at the left end of the left shell 19. The left casing 19 accommodates the motor 2, the gear box 11 accommodates the transmission assembly, and when the electric tool 100 operates, the motor 2 drives the transmission assembly to rotate, and the transmission assembly drives the saw blade to cut a workpiece, and then the casing 1 is rotated relative to the bottom plate 7 to adjust the cutting depth of the saw blade.
The housing 1 has a first accommodating portion 19a for accommodating the motor 2 and a second accommodating portion 13 for accommodating the circuit board 3, and the first accommodating portion 19a and the second accommodating portion 13 do not penetrate, so that the air flow is prevented from being series-flowed, which will be described later. The left casing 19 and the right casing 12 are covered to form a handle for holding, and a containing cavity 13b is enclosed below the handle, the containing cavity 13b is adjacent to the circumferential wall of the first containing portion 19a, the second containing portion 13 includes the containing cavity 13b, and the circuit board 3 is contained in the containing cavity 13 b.
The circuit board 3 is electrically connected with the motor 2 and drives the motor 2 to operate, and the circuit board 3 comprises a driving circuit for driving the motor 2 and a control circuit for controlling the driving circuit. The motor 2 is a brushless inner rotor motor, the motor 2 comprises a rotor 23 and a stator 24 arranged on the periphery of the rotor 23, the left end of the rotor 23 is supported on the gear box 11 through a bearing, the right end of the rotor is supported on the left shell 19, a first fan 21 positioned at the left end and a second fan 22 positioned at the right end of the rotor 23 are respectively arranged in the axial direction of the rotor 23, and the first fan and the second fan are driven to rotate.
The first accommodating portion 19a is provided with a first air outlet 6 located at the left side thereof and a first air inlet 17a located at the right side thereof (according to the different specifications of the selected fan or the different rotation directions of the fan blades, the air inlet in the embodiment of the present invention may be used as an air outlet, and similarly the air outlet may also be used as an air inlet). The second accommodating part 13 has a second air inlet 13a at the left side thereof and a second air outlet 15 at the right end thereof, the second accommodating part 13 further comprises a wind shielding ring 16 at the right side of the motor 2 and a cover plate 17 attached to the right end of the wind shielding ring 16, and the wind shielding ring 16 and the cover plate 17 are both fixed on the right side of the first accommodating part 19 a. The cover plate 17 and the wind deflector 16 enclose an inner cavity 17c, and the inner cavity 17c accommodates a second fan 22, and the second fan 22 is a discrete fan. The wind guard 16 has a through hole penetrating the accommodating chamber 13b and the inner cavity 17c in the middle, the rotor 23 has a spindle passing through the through hole of the wind guard 16 and extending into the inner cavity 17c, and the second fan 22 is fixed to the spindle 23 a.
The outer peripheries of the wind shielding ring 16 and the cover plate 17 are respectively provided with an outer cavity 17d, and the wind shielding ring 16 and the cover plate 17 are respectively provided with an inner annular wall for isolating the inner cavity 17c from the outer cavity 17 d. The first air inlet 17a is arranged on the outer ring of the right end of the cover plate 17 and is communicated with the external cavity 17 d. The first fan 21 is adjacent to the right side of the gear case 11, and the first air outlet 6 is disposed on the gear case 11. The outer cavity 17d communicates with the first accommodating portion 19a and forms a first cooling air duct. The first cooling air duct flows through the first accommodating portion 19a, the first fan 21 introduces air flow from the first air inlet 17a into the first cooling air duct, flows through the motor 2 in the first accommodating portion 19a, and then is discharged from the first air outlet 6 to the first accommodating portion 19a.
The second accommodating portion 13 further has a pipe 19b extending along the outer sidewall of the first accommodating portion 19a and integrally formed with the first accommodating portion 19a, and the pipe 19b is parallel to the first accommodating portion 19a, and of course, the "parallel" in this embodiment excludes slight angle differences caused by draft or molding errors. The above-mentioned duct 19b, the internal cavity 17c, and the accommodation chamber 13b communicate with each other and form a second cooling air duct. The inner cavity 17c has a notch radially below the second fan 22, and the notch forms the second air outlet 15, and the second air outlet 15 is arranged to incline toward the rotation direction of the second fan 22, so as to facilitate the air flow to be discharged along the air flow direction of the second fan 22, and reduce the air resistance. The second cooling air duct flows through the second accommodating portion 13, a plurality of ventilation holes are formed in the right end of the accommodating cavity 13b, the plurality of ventilation holes form the second air inlet 13a, the second fan 22 introduces air flow from the second air inlet 13a into the second cooling air duct, flows through the circuit board, and is discharged out of the second accommodating portion 13 through the second air outlet 15. The first cooling air duct and the second cooling air duct are mutually independent and isolated, so that the interference of mutual series flow or shunt of air flows is prevented, and the cooling effect is further enhanced. In addition, the air flow in the pipeline 19b is parallel to the air flow in the first accommodating part 19a, and different air channels are adjacently arranged, so that the volume of the electric circular saw is reduced.
According to the electric tool 100 of the first embodiment of the invention, the first fan 21 and the second fan 22 are respectively arranged at two axial ends of the motor 2, the first fan 21 introduces air flow to cool the motor and form the first cooling air channel, the second fan 22 introduces air flow to cool the circuit board 3 and form the second cooling air channel, and the first cooling air channel and the second cooling air channel are mutually independent and isolated, so that the air flow throughput in each air channel is improved, the air flow in the cooling air channels is prevented from streaming or splitting, the cooling effect on the motor 2 and the circuit board 3 is enhanced, and the service life of the electric tool 100 is further prolonged. In the present embodiment, the directions of the air flows introduced by the first fan 21 and the second fan 22 are opposite, and the first fan 21 and the second fan 22 are adjacent to the respective air outlets, so that the air flow rate of the respective cooling air channels is increased, and the cooling effect is further enhanced.
Referring to fig. 5, in a second embodiment of the present invention, only the second accommodating portion 13 'and the second cooling air duct are changed from the first embodiment, the wind deflector 16 in the first embodiment is omitted in the second embodiment, the second air inlet 13a is changed to the second air outlet 13a' in the first embodiment, and the second air inlet 17b 'is provided in the middle of the cover 17'.
The second accommodating portion 13 'and the second cooling air duct in the second embodiment will be further described below, and the right end of the second accommodating portion 13' has a second air inlet 17b ', and the left end has a second air outlet 13a'.
The second accommodating portion 13' includes a cover plate 17' located at the right end of the first accommodating portion 19a, an inner cavity 17c ' is formed by the cover plate 17' and the right side wall of the first accommodating portion 19a, and the inner cavity 17c ' accommodates the second fan 22. The periphery of the right end of the cover plate 17 'is provided with a first air inlet 17a', and the second air inlet 17b 'is positioned in the middle of the right end of the cover plate 17'. The cover plate 17 'is provided with an outer cavity 17d' at the outer periphery thereof and an inner annular wall for isolating the outer cavity 17d 'from the inner cavity 17c', the first air inlet 17a 'is communicated with the outer cavity 17d', and the second air inlet 17b 'is communicated with the inner cavity 17 c'. The second accommodating portion 13' further has a pipe 19b ' extending along the outer sidewall of the first accommodating portion 19a and integrally formed with the first accommodating portion 19a, the pipe 19b ' is parallel to the first accommodating portion 19a, the pipe 19b ', the internal cavity 17c ', and the accommodating cavity 13b ' are communicated to form the second cooling air duct, the second fan 22 introduces air flow from the second air inlet 17b ' into the second cooling air duct, flows through the circuit board 3, and is discharged from the second air outlet 13a ' to the second accommodating portion 13'.
According to the electric tool 100 of the second embodiment of the invention, the first fan 21 and the second fan 22 are respectively arranged at two axial ends of the motor 2, the first fan 21 introduces air flow to cool the motor and form the first cooling air channel, the second fan 22 introduces air flow to cool the circuit board 3 and form the second cooling air channel, the first cooling air channel and the second cooling air channel are mutually independent and isolated, the air flow throughput in each air channel is favorably improved, the air flow in the cooling air channels is prevented from streaming or splitting, the cooling effect on the motor 2 and the circuit board 3 is enhanced, and the service life of the electric tool 100 is further prolonged.
The invention is not limited to the specific embodiments described above, but the scope of the invention is defined by the appended claims.
Claims (12)
1. The electric tool comprises a shell, a motor and a circuit board, wherein the motor and the circuit board are accommodated in the shell, the shell is provided with a plurality of air inlets and a plurality of air outlets, the circuit board is electrically connected with the motor and drives the motor to operate, and the electric tool is characterized in that a first fan and a second fan are respectively installed at two axial ends of the motor and drive the first fan and the second fan to rotate, the first fan introduces air flow from one air inlet, discharges air from one air outlet after flowing through the motor to form a first cooling air channel, the second fan is introduced from the other air inlet, discharges air from the other air outlet after flowing through the circuit board to form a second cooling air channel, and the first cooling air channel and the second cooling air channel are mutually independent and isolated;
The shell is provided with a first accommodating part for accommodating the motor and a second accommodating part for accommodating the circuit board, the first cooling air channel flows through the first accommodating part, and the second cooling air channel flows through the second accommodating part;
the second accommodation part further comprises a wind shielding ring positioned on the right side of the motor and a cover plate attached to the right end of the wind shielding ring, an inner cavity is formed in the cover plate and the wind shielding ring in a surrounding mode, and the second fan is accommodated in the inner cavity.
2. The electric tool according to claim 1, wherein the air inlet comprises a first air inlet penetrating through the first accommodating portion and a second air inlet penetrating through the second accommodating portion, the air outlet comprises a first air outlet penetrating through the first accommodating portion and a second air outlet penetrating through the second accommodating portion, air flow of the first cooling air duct flows into the first accommodating portion through the first air inlet and flows through the motor in the first accommodating portion, then the first air outlet is used for discharging the first accommodating portion, air flow of the second cooling air duct flows into the second accommodating portion through the second air inlet and flows through the circuit board in the second accommodating portion, and then the second air outlet is used for discharging the second accommodating portion.
3. The power tool according to claim 2, wherein the inner cavity has a notch in a radial direction of the second fan, and the notch constitutes the second air outlet.
4. The power tool according to claim 3, wherein the second housing portion further comprises a pipe extending along an outer side wall of the first housing portion and integrally formed with the first housing portion, the pipe and the internal cavity are communicated with each other to form the second cooling air duct, and the first air inlet is formed in an outer ring at a right end of the cover plate.
5. The power tool according to claim 4, wherein an outer cavity is formed around the outer periphery of the wind deflector and the cover plate, the wind deflector and the cover plate are each provided with an inner annular wall separating the inner cavity from the outer cavity, and the outer cavity and the first accommodating portion form the first cooling air duct.
6. The power tool according to claim 5, wherein the second fan is a discrete fan, and the second air outlet is disposed below the inner cavity and is inclined toward the rotation direction of the discrete fan.
7. The electric tool comprises a shell, a motor and a circuit board, wherein the motor and the circuit board are accommodated in the shell, the shell is provided with a plurality of air inlets and a plurality of air outlets, the circuit board is electrically connected with the motor and drives the motor to operate, and the electric tool is characterized in that a first fan and a second fan are respectively installed at two axial ends of the motor and drive the first fan and the second fan to rotate, the first fan introduces air flow from one air inlet, discharges air from one air outlet after flowing through the motor to form a first cooling air channel, the second fan is introduced from the other air inlet, discharges air from the other air outlet after flowing through the circuit board to form a second cooling air channel, and the first cooling air channel and the second cooling air channel are mutually independent and isolated;
The shell is provided with a first accommodating part for accommodating the motor and a second accommodating part for accommodating the circuit board, the first cooling air channel flows through the first accommodating part, and the second cooling air channel flows through the second accommodating part;
the second accommodation portion further comprises a cover plate located at the right end of the first accommodation portion, an inner cavity is formed in the periphery of the cover plate and the right side wall of the first accommodation portion, and the second fan is accommodated in the inner cavity.
8. The electric tool according to claim 7, wherein the air inlet includes a first air inlet penetrating the first accommodating portion and a second air inlet penetrating the second accommodating portion, the air outlet includes a first air outlet penetrating the first accommodating portion and a second air outlet penetrating the second accommodating portion, the air flow of the first cooling air duct flows into the first accommodating portion through the first air inlet and flows through the motor in the first accommodating portion, and then is discharged from the first air outlet, and the air flow of the second cooling air duct flows into the second accommodating portion through the second air inlet and flows through the circuit board in the second accommodating portion, and then is discharged from the second accommodating portion through the second air outlet.
9. The power tool according to claim 8, wherein the second housing portion further has a duct extending along an outer side wall of the first housing portion and integrally formed with the first housing portion, the duct communicating with the internal cavity to form the second cooling air duct.
10. The power tool according to claim 9, wherein the cover plate is provided with an outer cavity at the outer periphery of the cover plate and an inner annular wall separating the outer cavity from the inner cavity, the first air inlet is arranged at the outer periphery of the cover plate and communicated with the outer cavity, the second air inlet is arranged at the middle part of the cover plate and communicated with the inner cavity, and the outer cavity and the first accommodating part form the first cooling air duct.
11. The power tool of claim 7, wherein the power tool is an electric circular saw comprising a base plate, and wherein the housing is coupled to the base plate.
12. The power tool according to claim 8, wherein the air flow direction in the first housing portion and the air flow direction in the second housing portion are at least partially parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898529.5A CN112117866B (en) | 2020-08-31 | 2020-08-31 | Power Tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898529.5A CN112117866B (en) | 2020-08-31 | 2020-08-31 | Power Tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112117866A CN112117866A (en) | 2020-12-22 |
| CN112117866B true CN112117866B (en) | 2024-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010898529.5A Active CN112117866B (en) | 2020-08-31 | 2020-08-31 | Power Tools |
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| CN (1) | CN112117866B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113618845B (en) * | 2021-07-30 | 2022-11-01 | 江苏东成工具科技有限公司 | Electric plane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016144856A (en) * | 2015-01-29 | 2016-08-12 | 株式会社マキタ | Electric tool |
| CN214591011U (en) * | 2020-08-31 | 2021-11-02 | 江苏东成工具科技有限公司 | electrical tools |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3748073B2 (en) * | 2002-10-22 | 2006-02-22 | 日立工機株式会社 | Electric cutting machine |
| JP5799220B2 (en) * | 2011-03-23 | 2015-10-21 | パナソニックＩｐマネジメント株式会社 | Electric tool |
| JP5633940B2 (en) * | 2012-03-15 | 2014-12-03 | 日立工機株式会社 | Portable electric cutting machine |
| CN210898830U (en) * | 2019-12-19 | 2020-06-30 | 常州格力博有限公司 | Electric tool |
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2020
- 2020-08-31 CN CN202010898529.5A patent/CN112117866B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016144856A (en) * | 2015-01-29 | 2016-08-12 | 株式会社マキタ | Electric tool |
| CN214591011U (en) * | 2020-08-31 | 2021-11-02 | 江苏东成工具科技有限公司 | electrical tools |
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| CN112117866A (en) | 2020-12-22 |
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