CN115256651A - Electric tool and combination of electric tool and battery pack - Google Patents
Electric tool and combination of electric tool and battery pack Download PDFInfo
- Publication number
- CN115256651A CN115256651A CN202210722705.9A CN202210722705A CN115256651A CN 115256651 A CN115256651 A CN 115256651A CN 202210722705 A CN202210722705 A CN 202210722705A CN 115256651 A CN115256651 A CN 115256651A
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- Prior art keywords
- valve
- power tool
- cavity
- suction
- channel
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Links
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 230000000740 bleeding effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 9
- 239000000919 ceramic Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Computer Hardware Design (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The invention discloses an electric tool, which comprises a handle and a shell, wherein a telescopic assembly is arranged on the shell and comprises a sleeve and a telescopic pipe, and an annular sucking disc is arranged on the sleeve; a hammering piece is arranged in the shell and connected with an air extraction assembly capable of intermittently extracting air, and a suction cavity connected with the air extraction assembly is arranged on the sleeve; the electric hammer can provide drilling auxiliary force for a user during drilling, saves labor force of the user during propelling a drill bit, and simultaneously provides a sucker capable of enabling the electric hammer to be adsorbed with a cavity body, so that the electric hammer is more stable in use.
Description
Technical Field
The invention relates to the technical field of electric tools, in particular to an electric tool and a combination of the electric tool and a battery pack.
Background
Electric tool is the appurtenance who uses commonly in the production life, and along with the promotion that people required electric tool portability, lithium electricity is all adopted to current electric tool most, avoids electric tool external power supply's trouble, and the electric hammer is electric tool's one kind, and it has the effect of reciprocal hammering when drilling, receives the favor of house ornamentation trade deeply, and current electric hammer has following shortcoming:
1. when the electric hammer is used, the drilling position needs to be propelled to improve the drilling speed and efficiency, when a plurality of holes are drilled, the accumulated labor force needs to be large, and large burden is added to a user;
2. when drilling ceramic tile wall, because of the ceramic tile surface is more smooth, the drill bit easily produces the displacement on the surface, and the stability of punching is relatively poor when tentatively contacting.
Disclosure of Invention
The present invention addresses the deficiencies in the art by providing a power tool and a combination power tool and battery pack.
In order to solve the technical problems, the invention is solved by the following technical scheme: an electric tool comprises a handle and a shell.
In the above scheme, preferably, a telescopic assembly is arranged on the housing, the telescopic assembly comprises a sleeve and a telescopic pipe, and the sleeve is provided with an annular sucking disc;
a hammering piece is arranged in the shell and connected with an air extraction assembly capable of intermittently extracting air, and a suction cavity connected with the air extraction assembly is arranged on the sleeve;
the air exhaust device is characterized in that a valve body is arranged between the air exhaust assembly and the suction cavity, an intermittently sliding valve rod is arranged in the valve body, a vent hole is formed in the valve rod, and the air exhaust assembly can perform intermittent air exhaust on the suction cavity through the vent hole.
In the above scheme, preferably, the telescopic pipe is arranged on the shell, a piston ring matched with the suction cavity is arranged at the end of the telescopic pipe, and the sleeve is arranged on the telescopic pipe in a sliding manner through the piston ring.
In the above scheme, preferably, the air exhaust assembly comprises a cylinder body and a piston, the piston is arranged on the hammering piece through a piston rod, the cylinder body is fixedly arranged in the shell, and a suction hole connected with the vent hole is formed in the cylinder body.
In the above scheme, preferably, a first cavity is arranged between the piston and the cylinder body, the suction hole is arranged on the first cavity, and the cylinder body is provided with a one-way valve connected with the first cavity.
In the above scheme, preferably, the valve body is arranged on the housing, a first channel and a second channel are arranged in the valve body, the first channel and the second channel are vertically arranged and communicated, the valve rod is slidably arranged on the second channel, the suction cavity is connected with the first channel, and the vent hole is communicated with the first channel after the valve rod slides.
In the above scheme, it is preferred, be equipped with first spring between valve rod and the casing, in the second passageway was located to valve rod one end, the other end was equipped with the roof after wearing to establish the casing, be equipped with the pivot in the casing, be equipped with in the pivot with roof matched with nose bar.
In the above scheme, preferably, a sliding ring is arranged on the rotating shaft, the protruding rod is arranged on the sliding ring, the sliding ring is connected with the rotating shaft through a spline or a long key, an electromagnet matched with the sliding ring is arranged in the shell, a reversing switch is arranged on the shell, the electromagnet is electrically connected with the reversing switch, and a second spring is arranged between the sliding ring and the shell.
In the above scheme, preferably, the cylinder body is provided with an air valve, a third spring is arranged between the air valve and the cylinder body, the air valve is provided with a pull rope, the sliding ring is provided with a rotating ring connected with the pull rope, and the rotating ring is rotatably arranged on the sliding ring.
In the above scheme, preferably, the combination of electric tool and battery package, electric tool still includes the battery package, the battery package is located on the casing.
The invention has the beneficial effects that: the invention provides the electric hammer which can provide drilling auxiliary force for a user during drilling, saves labor force of the user during propelling a drill bit, and simultaneously provides the sucker which can enable the electric hammer to be adsorbed with a cavity, so that the electric hammer is more stable during use.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention.
FIG. 2 is a schematic view of the enlarged structure of part A of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1-2, the electric tool, which is preferably a lithium electric hammer, includes a handle 1 and a housing 2, the handle 1 is disposed at the front end of the housing 2, the housing 2 is provided with a telescopic assembly, the telescopic assembly includes a sleeve 3 and a telescopic tube 4 disposed on the housing 2, one end of the telescopic tube 4 is fixedly disposed on the housing 2, the other end of the telescopic tube is provided with a piston ring 11, the sleeve 3 is provided with an annular suction cavity 7, and the piston ring 11 is slidably disposed in the annular suction cavity 7.
Flexible subassembly center and electric tool's drill bit gyration axle center are set up with the axle center, 3 one end of sleeve slides and locates on piston ring 11, and the other end is equipped with ring-shaped sucking disc 5, ring-shaped sucking disc 5 preferred rubber suction cup can adopt the push type to press to the ceramic tile wall face on, makes sucking disc 5 and ceramic tile wall face laminating, and sleeve 3 is fixed in on the wall through sucking disc 5 after the laminating.
As shown in fig. 1, the suction chamber 7 is a chamber formed between the piston ring 11 and the bottom surface of the left end chamber of the sleeve 3, and the suction opening 62 is provided on the side of the suction chamber 7 close to the suction cup 5, so that when the suction cup 5 is fixed to a wall surface, the suction opening 62 can be evacuated to form a negative pressure in the suction chamber 7 and then to force the casing 2 to slide toward the wall surface, and the suction opening 62 can be evacuated intermittently to provide an intermittent impact effect when the casing 2 slides toward the wall surface.
Be equipped with hammering piece 6 in the casing 2, hammering piece 6 is current electric hammer structure for carry out intermittent type hammering to the electric hammer drill bit and make the drill bit produce the impact force, this is prior art, does not do too much repeated here, 6 left ends of hammering piece are to the drill bit hammering, and the right-hand member is equipped with piston rod 23, 23 one end of piston rod and 6 fixed connection of hammering, the other end has set firmly piston 22.
The inside of the housing 2 is provided with a cylinder 21 matched with the piston 22, the cylinder 21 is fixedly arranged in the housing 2, that is, when the hammering piece 6 slides back and forth, the piston 22 can slide in the cylinder 21, as shown in fig. 2, a first cavity 25 is formed between the piston 22 and the bottom of the right cavity of the cylinder 21, the cylinder 21 is provided with a suction hole 24, the suction hole 24 is always communicated with the first cavity 25, when the suction hole 24 is blocked, the piston 22 slides leftwards, a high negative pressure can be formed in the first cavity 25, then the suction hole 24 is opened, so that air can rapidly enter the first cavity 25 from the outside through the suction hole 24, the cylinder 21 is provided with a check valve 26 connected with the first cavity 25, and the flow direction of the check valve 26 is from the first cavity 25 to the outside of the cylinder 21.
As shown in fig. 2, the valve rod 9 is slidably disposed on the second channel 32, a vent hole 10 is disposed in the valve rod 9, outlets at two ends of the vent hole 10 are disposed on a side wall of the valve rod 9, an outlet at an upper end of the vent hole 10 can be communicated with the first channel 31 at the left side after the valve rod 9 slides upwards, an outlet at a lower end of the vent hole 10 is connected with the suction hole 24 through a hose, and then when a high negative pressure is formed in the first cavity 25, the suction hole 24 can rapidly draw out the gas in the suction cavity 7 through the vent hole 10 and the first power supply 31, so that the suction cavity 7 forms a negative pressure.
The pneumatic hammer is characterized in that a rotating shaft 35 capable of driving the valve rod 9 to intermittently slide is arranged in the shell 2, the rotating shaft 35 is a rotating shaft of an existing driving hammering piece 6 in the electric hammer, and specifically, a first spring 33 is arranged between the valve rod 9 and the valve body 8, one end of the valve rod 9 is arranged in the second channel 32, a fixed top plate 34 is arranged at the other end of the valve rod after penetrating through the shell 2, a convex rod 36 matched with the top plate 34 is arranged on the rotating shaft 35, a circular arc-shaped bulge is arranged on the convex rod 36, namely, when the rotating shaft 35 rotates, the convex rod 36 can rotate, when the convex rod 36 is in contact with the top plate 34, the valve rod 9 can slide upwards to enable an outlet at the upper end of the vent hole 10 to be communicated with the first channel 31, in the existing electric hammer, the rotating shaft 35 rotates for one circle, the hammering piece 6 reciprocates once, the rightmost end position of the hammering piece 6 is shown in a non-hammering state, when the rotating shaft 35 rotates, the piston 22 slides leftwards to enable a first cavity 25 to generate high negative pressure in the first cavity 25, when the convex rod 36 rotates, the driving shaft 9 pushes upwards to push the driving rod 9 to lean against the first channel 31, the first cavity 25, the suction expansion tube 7 is communicated with the first cavity 25, and the suction force is formed in the suction expansion tube, and the suction chamber 7 is rapidly, and the suction force is formed in the suction expansion tube 5, and the suction expansion tube, and the suction chamber 7 is rapidly.
Be equipped with the slip ring 41 on the pivot 35, projecting rod 36 sets firmly on slip ring 41, slip ring 41 passes through spline or long key connection with pivot 35, be equipped with in the casing 2 with slip ring 41 matched with electro-magnet 42, be equipped with rolling bearing between electro-magnet 42 and the casing 2, be equipped with reversing switch on the casing 2, electro-magnet 42 is connected with reversing switch is electric, be equipped with second spring 43 between slip ring 41 and the casing 2, when the electric hammer punches to finish or block and need the upset promptly, electro-magnet 42 adsorbs slip ring 41, when making projecting rod 36 on the slip ring 41 rotate no longer with the contact cooperation of roof 34, valve rod 9 is no longer slided when also the electric hammer reversal.
An air valve 51 is arranged on the cylinder body 21, a third spring 52 is arranged between the air valve 51 and the cylinder body 21, a pull rope 53 is arranged on the air valve 51, a rotating ring 54 connected with the pull rope 53 is arranged on the sliding ring 41, and the rotating ring 54 is rotatably arranged on the sliding ring 41, namely when the electromagnet 42 adsorbs the sliding ring 41, the rotating ring 54 drives the pull rope 53 to slide and pull the pull rope 53, so that the air valve 51 is opened, at the moment, the first cavity 35 is in a communication state with the outside, namely, the suction assembly does not work any more when the electric hammer rotates reversely.
The combination of a power tool and a battery pack, the power tool further comprises a battery pack 61, and the battery pack 61 is arranged on the housing 2.
A method of using the power tool and the combination of the power tool and the battery pack as described above: when the hammer is used, the annular sucker 5 is adsorbed on the surface of a ceramic tile through manual pressure, then the electric hammer is started, when the electric hammer rotates forwards, the hammering piece 6 reciprocates, in the leftward sliding process of the hammering piece 6, the piston 22 in the air extraction assembly slides leftwards to enable high negative pressure to be formed in the first cavity 25, at the moment, the upper end of the vent hole 10 of the valve rod 9 is in contact with the wall body of the second channel 32 of the valve body 8, namely, the upper end of the vent hole 10 is in a closed state, when the hammering piece 6 slides to the leftmost end, the protruding rod 36 upwards abuts against the top plate 34 to enable the valve rod 9 to slide upwards to the topmost end, at the moment, the opening at the upper end of the vent hole 10 is communicated with the first channel 31, the high negative pressure in the first cavity 25 instantly extracts gas in the suction cavity 7 through the vent hole 10, negative pressure is formed in the suction cavity 7, the telescopic pipe 4 has leftward sliding force, drilling pushing auxiliary force is provided for a user, namely, the telescopic pipe 4 drives the hammering shell 2 to have auxiliary force sliding towards the wall body while the electric hammer, so that labor force of the user is saved, and the punching efficiency is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. Electric tool, including handle (1) and casing (2), its characterized in that: a telescopic component is arranged on the shell (2), the telescopic component comprises a sleeve (3) and a telescopic pipe (4), and an annular sucking disc (5) is arranged on the sleeve (3);
a hammering piece (6) is arranged in the shell (2), the hammering piece (6) is connected with an air extraction assembly capable of intermittently extracting air, and a suction cavity (7) connected with the air extraction assembly is arranged on the sleeve (3);
be equipped with valve body (8) between subassembly and the suction chamber (7) of bleeding, be equipped with intermittent sliding's valve rod (9) in valve body (8), be equipped with air vent (10) in valve rod (9), subassembly accessible air vent (10) of bleeding is bled the suction chamber (7) intermittently.
2. The power tool of claim 1, wherein: the telescopic pipe (4) is arranged on the shell (2), a piston ring (11) matched with the suction cavity (7) is arranged at the end part of the telescopic pipe (4), and the sleeve (3) is arranged on the telescopic pipe (4) in a sliding mode through the piston ring (11).
3. The power tool of claim 2, wherein: the air exhaust assembly comprises a cylinder body (21) and a piston (22), the piston (22) is arranged on the hammering piece (6) through a piston rod (23), the cylinder body (21) is fixedly arranged in the shell (2), and a suction hole (24) connected with the vent hole (10) is formed in the cylinder body (21).
4. The power tool of claim 3, wherein: be equipped with first cavity (25) between piston (22) and cylinder body (21), suction hole (24) are located on first cavity (25), be equipped with check valve (26) that link to each other with first cavity (25) on cylinder body (21).
5. The power tool of claim 4, wherein: the valve body (8) is arranged on the shell (2), a first channel (31) and a second channel (32) are arranged in the valve body (8), the first channel (31) and the second channel (32) are vertically arranged and communicated, the valve rod (9) is arranged on the second channel (32) in a sliding mode, the suction cavity (7) is connected with the first channel (31), and the valve rod (9) can enable the vent hole (10) to be communicated with the first channel (31) after sliding.
6. The power tool of claim 5, wherein: be equipped with first spring (33) between valve rod (9) and valve body (8), in second passageway (32) was located to valve rod (9) one end, the other end was worn to establish and is equipped with roof (34) behind casing (2), be equipped with pivot (35) in casing (2), be equipped with on pivot (35) with roof (34) matched with protruding pole (36).
7. The power tool of claim 6, wherein: be equipped with slip ring (41) on pivot (35), on slip ring (41) was located in nose bar (36), slip ring (41) passed through spline or long key with pivot (35) and are connected, be equipped with in casing (2) with slip ring (41) matched with electro-magnet (42), be equipped with the reversal switch on casing (2), electro-magnet (42) are connected with the reversal switch electricity, be equipped with second spring (43) between slip ring (41) and casing (2).
8. The power tool of claim 7, wherein: the cylinder body (21) is provided with an air valve (51), a third spring (52) is arranged between the air valve (51) and the cylinder body (21), the air valve (51) is provided with a pull rope (53), the sliding ring (41) is provided with a rotating ring (54) connected with the pull rope (53), and the rotating ring (54) is rotatably arranged on the sliding ring (41).
9. Combination of electric tool and battery package, its characterized in that: a power tool comprising any one of claims 1 to 9, said power tool further comprising a battery pack (61), said battery pack (61) being provided on the housing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722705.9A CN115256651B (en) | 2022-06-24 | 2022-06-24 | Electric tool and combination of electric tool and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210722705.9A CN115256651B (en) | 2022-06-24 | 2022-06-24 | Electric tool and combination of electric tool and battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115256651A true CN115256651A (en) | 2022-11-01 |
| CN115256651B CN115256651B (en) | 2022-12-30 |
Family
ID=83761047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210722705.9A Active CN115256651B (en) | 2022-06-24 | 2022-06-24 | Electric tool and combination of electric tool and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115256651B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1323966A (en) * | 1970-12-23 | 1973-07-18 | Baker Oil Tools Inc | Percussion drilling apparatus |
| JP2000033507A (en) * | 1998-07-16 | 2000-02-02 | Ryobi Ltd | Striking force adjusting mechanism of hammer drill |
| US6199644B1 (en) * | 1998-03-17 | 2001-03-13 | Hilti Aktiengesellschaft | Drilling tool with a suction device |
| CN101903134A (en) * | 2007-12-21 | 2010-12-01 | 罗伯特·博世有限公司 | Hand-held machine tool |
| CN105583783A (en) * | 2015-02-13 | 2016-05-18 | 余姚市陆埠镇鸿杰纸箱厂 | Electric hammer capable of sucking dust |
| CN205415516U (en) * | 2015-12-17 | 2016-08-03 | 北京市第五建筑工程集团有限公司 | Electric hammer subassembly with but resetting lag |
| CN213259296U (en) * | 2020-10-14 | 2021-05-25 | 南通东科工具有限公司 | Lithium electric duplex electric hammer with dust collector |
| CN113458456A (en) * | 2021-06-28 | 2021-10-01 | 浙江闽立电动工具有限公司 | High stability electric tool |
-
2022
- 2022-06-24 CN CN202210722705.9A patent/CN115256651B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1323966A (en) * | 1970-12-23 | 1973-07-18 | Baker Oil Tools Inc | Percussion drilling apparatus |
| US6199644B1 (en) * | 1998-03-17 | 2001-03-13 | Hilti Aktiengesellschaft | Drilling tool with a suction device |
| JP2000033507A (en) * | 1998-07-16 | 2000-02-02 | Ryobi Ltd | Striking force adjusting mechanism of hammer drill |
| CN101903134A (en) * | 2007-12-21 | 2010-12-01 | 罗伯特·博世有限公司 | Hand-held machine tool |
| CN105583783A (en) * | 2015-02-13 | 2016-05-18 | 余姚市陆埠镇鸿杰纸箱厂 | Electric hammer capable of sucking dust |
| CN205415516U (en) * | 2015-12-17 | 2016-08-03 | 北京市第五建筑工程集团有限公司 | Electric hammer subassembly with but resetting lag |
| CN213259296U (en) * | 2020-10-14 | 2021-05-25 | 南通东科工具有限公司 | Lithium electric duplex electric hammer with dust collector |
| CN113458456A (en) * | 2021-06-28 | 2021-10-01 | 浙江闽立电动工具有限公司 | High stability electric tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115256651B (en) | 2022-12-30 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Combination of electric tools and battery packs Effective date of registration: 20231011 Granted publication date: 20221230 Pledgee: Yongkang branch of the Industrial Commercial Bank of China Ltd. Pledgor: Yongkang Lingwei Electric Appliance Co.,Ltd. Registration number: Y2023980060598 |
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