CN107553283B - Hand-held electric tool - Google Patents
Hand-held electric tool Download PDFInfo
- Publication number
- CN107553283B CN107553283B CN201710970761.3A CN201710970761A CN107553283B CN 107553283 B CN107553283 B CN 107553283B CN 201710970761 A CN201710970761 A CN 201710970761A CN 107553283 B CN107553283 B CN 107553283B
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- China
- Prior art keywords
- air
- motor
- shell
- main body
- main shaft
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000001427 coherent effect Effects 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Drilling And Boring (AREA)
- Prostheses (AREA)
Abstract
The hand-held electric tool consists of a shell and a machine core, wherein the shell consists of a rear shell, a middle shell and a front shell, the machine core consists of a motor from back to front, a motor head sleeve, a bearing nut, a main body, a rear bearing, a bearing gasket, a spring, a handle aluminum lining ring, a ball outer sleeve, a ball inner sleeve, a main body nut, a main shaft front sleeve and a main shaft; the key points are that: the top end of the rear shell is provided with an air inlet interface, an air passage penetrating from the rear end to the front end is arranged in the movement, and an air passage outlet is arranged on the inner wall of the front sleeve of the main shaft. The invention improves on the basis of the prior art, and forcedly refrigerates the interior of the machine core by adding the air inlet interface and the through air passage, so that the problems of scalding, dust prevention and scrap removal of the hand-held electric tool can be effectively solved, the service life of the electric tool is greatly prolonged, and the working environment of operators is improved.
Description
Technical Field
The invention relates to an electric tool, in particular to a handheld electric tool.
Technical Field
The common hand-held electric tool is mainly used for polishing and carving in jade, dentistry and other fields, and is composed of a shell and a core, wherein the shell consists of a rear shell 15, a middle shell 14 and a front shell 3 from back to front, the core consists of a motor 13, a motor head cover 12, a bearing nut 11, a main body 7, a rear bearing 10, a bearing gasket 9, a spring 8, a handle aluminum lining ring 6, a ball outer sleeve 5, a ball 17, a ball inner sleeve 18, a main body nut 4, a main shaft front sleeve 2 and a main shaft 1; the main shaft is composed of a three-leaf spring 1-2, a hollow shaft 1-3, a clamp spring 1-4, a dust ring 1-5, a dust cover 1-6, a front bearing 1-7, a disc spring 1-8, a disc spring lock catch 1-9, a three-leaf spring lock catch 1-15, a bolt 1-10, a small spring short sleeve 1-13, a small spring 1-12, a small spring long sleeve 1-11 and a small shaft core 1-14.
As shown in fig. 4-6, the motor 13, the main body 7 and the main shaft front sleeve 2 are respectively schematic in structure, the heat generated by the motor in long-time use is conducted to the surface of the handle by the direct contact of the motor and the handle shell to perform natural heat dissipation, the heat dissipation effect is poor, the surface of the handle is scalded, the normal work of the tool is affected, the use experience of a user is also hindered, the long-time operation of the electric tool is not facilitated, and three screw locking grooves 13-1-4 are formed in the rear end of the motor. When a general electric tool works, the front end of the electric tool is simply dustproof by using the dustproof ring 1-5 and the dustproof sleeve 1-6, and the front end of the main shaft front sleeve 2 is provided with two symmetrical chip outlets 2-2 for discharging impurities entering the front sleeve, but dust and water mist enter the tool from the inner wall of the main shaft front sleeve, so that the performance of the tool is affected, internal parts rust, and the service life of the tool is shortened.
Disclosure of Invention
The invention aims to overcome the defects of impurity inhalation and poor cooling of a tool in the prior art, and provides a handheld electric tool with good cooling and dustproof effects.
The technical scheme adopted by the invention is that the handheld electric tool comprises a shell and a machine core, wherein the shell comprises a rear shell, a middle shell and a front shell, the machine core comprises a motor, a motor head sleeve, a bearing nut, a main body, a rear bearing, a bearing gasket, a spring, a handle aluminum lining ring, a ball outer sleeve, a ball inner sleeve, a main body nut, a main shaft front sleeve and a main shaft from back to front; the key points are that: the top end of the rear shell is provided with an air inlet interface, an air passage penetrating from the rear end to the front end is arranged in the movement, and an air passage outlet is arranged on the inner wall of the front sleeve of the main shaft.
The invention improves on the basis of the prior art, forcedly refrigerates the interior of the machine core by adding the air inlet port and the through air passage, wherein the gap between the rotating main shaft and the front sleeve of the main shaft in the prior art is the main part of dust entering the interior of the tool, and the outlet of the air passage is arranged on the inner wall of the front sleeve of the main shaft, so that dust cannot enter, the interior of the machine core is ensured to be clean, and the service life of the tool is prolonged.
The air passage consists of a handle rear shell air inlet interface, a plug air hole, a motor air groove, a main body air hole and a main shaft front sleeve air groove, and the plurality of air passages are connected together, so that the smoothness of air circulation in the handle is ensured.
Because of a plurality of internal parts of the hand-held electric tool, the hand-held electric tool has a compact structure, in order to ensure that the air passage from the rear end to the front end is smooth, the invention designs a plurality of components which are connected with each other in a relatively airtight way, and the plurality of gas passages are connected together, thereby ensuring the smooth circulation of the gas in the handle.
The specific design is as follows:
the motor air groove is composed of a screw locking groove at the rear end of the motor, a diagonal air groove at the outer surface of the motor, an axial air groove at the front end of the motor and a radial air groove at the front end face of the motor, which is communicated with the axial air groove at the front end of the motor, so that a coherent air passage is formed. The original motor is tightly contacted with the shell, and the diagonal air grooves are processed on the surface of the motor, so that air flows spirally along the surface of the motor to take away heat, meanwhile, the contact surface of the motor and the shell is small, the heat conducted to the shell is small, and the use experience of a user is improved. Because the motor head cover is tightly matched with the shell, gas is introduced into the motor head cover through the radial air groove on the front end surface of the motor.
The main body air groove is formed in the part of the inner wall of the main body, which is matched with the rear bearing, the front end of the main body is provided with a main body air hole, and air is led to the main body air hole from the main body air groove. Because the matching part of the inner wall of the main body and the rear bearing is relatively airtight, the main body inner wall is specially designed to be provided with an axial main body air groove, so that air passes through the main body and enters the front sleeve of the main shaft through the air hole of the main body at the front end.
The main shaft front sleeve air groove is formed in the matched part of the main shaft front sleeve and the front bearing. Because the matching part of the front sleeve of the main shaft and the front bearing is relatively airtight, the inner wall of the front sleeve of the main shaft is specially designed with an axial front sleeve air groove of the main shaft, so that air is sprayed out from the inner wall of the front sleeve of the main shaft, dust is blown off the main shaft, the processing surface is radiated, the working environment of the processing head is improved, and the processing quality is improved.
The motor front end axial air grooves and the motor front end radial air grooves which are uniformly distributed on the three circumferences form a coherent air passage.
The invention improves on the basis of the prior art, and forcedly refrigerates the interior of the machine core by adding the air inlet interface and the through air passage, so that the problems of hair scalding, dust prevention and scrap removal of the hand-held electric tool can be effectively solved, the service life of the electric tool is greatly prolonged, and the working environment of operators is improved.
Drawings
FIG. 1 is a schematic diagram of a conventional hand-held power tool-Ai Tegao speed sander
Fig. 2 is a schematic view of a housing structure of a hand-held power tool
Fig. 3 is a schematic diagram of a movement structure of a hand-held power tool
Fig. 4 is a schematic diagram of a motor structure of a conventional hand-held power tool
Fig. 5 is a schematic main structure of a conventional hand-held power tool
Fig. 6 is a schematic diagram of a spindle front sleeve structure of a conventional hand-held power tool
Fig. 7 is a schematic view of a spindle portion of a hand-held power tool
FIG. 8 is a schematic view of a hand-held power tool according to the present invention
FIG. 9 is a schematic diagram showing the direction of the air passage of the hand-held power tool according to the present invention
FIG. 10 is a schematic view of the rear shell of the present invention
FIG. 11 is a schematic diagram of an improved motor
FIG. 12 is a schematic view of the structure of the improved main body
FIG. 13 is a schematic view showing the structure of the improved rear body and rear bearing
FIG. 14 is a schematic view of the improved front spindle sleeve
FIG. 15 is a schematic view of the structure of the front sleeve and front bearing of the improved rear main shaft
FIG. 16 is a view showing the state of use of the present invention
Wherein: 1 main shaft 1-1 core rod 1-2 three-leaf spring 1-3 hollow shaft 1-4 clamp spring 1-5 dust ring 1-6 dust cover 1-7 front bearing 1-8 disc spring 1-9 disc spring lock catch 1-10 bolt 1-11 small spring long sleeve 1-12 small spring 1-13 small spring short sleeve 1-14 small shaft core 1-15 three-leaf spring lock catch 2 main shaft front sleeve 2-1 main shaft front sleeve gas slot 2-2 chip outlet 3 front shell 4 main body nut 5 ball outer sleeve 6 handle aluminum bushing 7 main body, 7-1 main body gas hole 7-2 main body gas slot 8 spring 9 bearing gasket 10 rear bearing nut 12 motor head cover 13-1 motor gas slot 13-1-1 twill gas slot 13-1-2 motor front end radial gas slot 13-1-3 motor front end axial gas slot 13-1-4 motor rear end screw lock slot 14 middle shell 15 rear shell 15-1 gas inlet interface 16 plug 16-1 plug 17 ball 19 gas pump 20 gas slot 14 air pump 20 gas slot 14-1 air pump 22 air flue outlet.
Detailed Description
The invention will now be described in detail with reference to the drawings, the examples being given to enable one skilled in the art to make a better understanding of the invention without limiting the invention in any way.
As shown in fig. 2 and 7-16, the invention is an improvement on the basis of the prior art, and comprises a shell and a movement, wherein the shell comprises a rear shell 15, a middle shell 14 and a front shell 3, the movement comprises a motor 13, a motor head cover 12, a bearing nut 11, a main body 7, a rear bearing 10, a bearing gasket 9, a spring 8, a handle aluminum lining 6, a ball outer sleeve 5, a ball 17, a ball inner sleeve 18, a main body nut 4, a main shaft front sleeve 2 and a main shaft 1 from back to front; the top of the rear shell is provided with an air inlet interface 15-1, an air passage 22 penetrating from the rear end to the front end is arranged in the movement, and an air passage outlet 22-1 is arranged on the inner wall of the front sleeve of the main shaft.
Because the handheld electric tool has a plurality of internal parts and a compact structure, in order to ensure that the air passage from the rear end to the front end is smooth, the invention designs air passage channels by mutually connecting a plurality of parts which are relatively airtight originally, and the air passage 22 consists of a handle rear shell air inlet interface 15-1, a plug air hole 16-1, a motor air groove 13-1, a main body air groove 7-2, a main body air hole 7-1 and a main shaft front sleeve air groove 2-1, and the plurality of air passages are connected together to ensure that the air circulates inside the handle smoothly.
The main improved parts of the invention are a handle back shell, a plug, a motor, a main body and a main shaft front sleeve.
The method comprises the following steps: through holes are directly drilled in the handle rear housing 15 and the plug 16, and the air inlet port 15-1 and the plug air hole 16-1.
The motor air groove 13-1 takes the existing screw locking groove 13-1-4 at the rear end of the motor as an air channel, and is additionally provided with a diagonal air groove 13-1-1 at the outer surface of the motor, an axial air groove 13-1-3 at the front end of the motor and a radial air groove 13-1-2 at the front end surface of the motor which is communicated with the axial air groove at the front end of the motor to form a coherent air channel. The cutter withdrawal grooves are formed in the two ends of the diagonal air groove 13-1-1 for machining the outer surface of the motor, the original motor is in close contact with the shell, the diagonal air groove is machined in the surface of the motor, so that air flows spirally along the surface of the motor to take away heat, meanwhile, the contact surface of the motor and the shell is small, the heat conducted to the shell is small, and the use experience of a user is improved. The air grooves on the surface of the motor can also be processed into straight grooves. Because the motor head cover is tightly matched with the shell, gas is introduced into the motor head cover through the radial air groove on the front end surface of the motor.
The main body is additionally provided with a main body air groove 7-2 and a main body air hole 7-1, the main body air groove 7-2 is arranged at the part of the inner wall of the main body, which is matched with the rear bearing 10, the front end of the main body is provided with the main body air hole 7-1, and air is led to the main body air hole 7-1 from the main body air groove 7-2. An axial main body air groove is formed in the inner wall of the main body, so that air passes through the main body and enters the front sleeve of the main shaft through the air hole of the main body at the front end.
The front sleeve of the main shaft cancels (seals) the original chip outlet 2-2, and adds a front sleeve air groove 2-1 which is arranged at the matching part of the front sleeve 2 of the main shaft and the front bearing 1-7, so that the cooling air is concentrated at the front end and is blown out intensively. Because the matching part of the front sleeve of the main shaft and the front bearing is relatively airtight, the inner wall of the front sleeve of the main shaft is specially designed with an axial front sleeve air groove of the main shaft, so that air is sprayed out from the inner wall of the front sleeve of the main shaft, dust is blown off the main shaft, the processing surface is radiated, the working environment of the processing head is improved, and the processing quality is improved.
Fig. 16 is a view showing the use state of the present invention, wherein the external air pump 19 can be used for other air sources to be communicated with the air inlet port 15-1 of the handle rear shell of the present invention through a pipeline, and the power supply 20 is electrically connected with the present invention and the air pump.
The working process of the invention comprises the following steps: the power supply 20 of the hand-held electric tool is turned on to enable the electric tool to be in a working state, cooling gas generated by the air pump 19 enters the plug air hole 16-1 through the air inlet interface (15-1) of the handle back shell and then enters the motor air groove (13-1-1) (three parts of the main body nut 5 and the handle aluminum lining ring 6 are arranged on the outer wall of the main body due to the fact that the main body nut 5 and the handle aluminum lining ring 6 are arranged on the outer wall of the main body, the ball outer sleeve 5 is matched with the end face of the outer wall of the main body due to the fact that the motor back end screw locking groove (13-1-4), the motor front end axial air groove (13-1-3) and the motor front end face radial air groove (13-1-2) communicated with the motor front end axial air groove) enter the motor head sleeve, the air is conducted to the main body from the motor head sleeve 12 and enters the inner wall of the main body due to the fact that the ball outer wall of the main body is provided with the ball outer sleeve 5, the main body nut 5 is matched with the end face of the main shaft front sleeve 2, the main body outer wall and the outer shell are sealed by the structure, so that gas can only fill the whole main body inner wall, the main body inner wall comprises a spring 8, the ball inner sleeve 18 also comprises a main shaft, as the main shaft 1 inner wall comprises a three-leaf spring lock catch 1-12 and a three-leaf spring 1-3, the two parts are tightly matched with the main shaft inner wall, gas is not easy to enter the main shaft inner wall from the main body inner wall and pass through a gap between the three-leaf spring 1-2 and the main shaft inner wall, so that the gas can only pass through the gap between the ball inner sleeve 18 and the main shaft, reach the main body air hole 7-1 at the main body front end, and then reach the main shaft front sleeve air groove 2-1 through the main body air hole 7-1, blowing out from the front end of the front sleeve of the main shaft.
The remaining non-described parts are identical to the prior art.
Claims (1)
1. The utility model provides a handheld electric tool, it includes shell and core group, and the shell comprises backshell (15), well shell (14), preceding shell (3) triplex, and the core comprises motor (13) from the back to the front, motor headgear (12), bearing nut, main part, rear bearing, bearing gasket, spring, handle aluminium lining, ball overcoat, ball endotheca, main part nut, main shaft front cover, main shaft, its characterized in that: the top end of the back shell is provided with an air inlet interface (15-1), an air passage (22) penetrating from the back end to the front end is arranged in the movement, an air passage outlet (22-1) is arranged on the inner wall of the front sleeve of the main shaft, the air inlet interface (15-1) is communicated with an external air pump (19) or other air sources through a pipeline, the air passage (22) consists of the handle back shell air inlet interface (15-1), a plug air hole (16-1), a motor air groove (13-1), a main body air groove (7-2), a main body air hole (7-1) and a main shaft front sleeve air groove (2-1), the air passages are connected, the circulation of air in the handle is ensured, the motor air groove (13-1) consists of a motor back end screw locking groove (13-1-4), a diagonal air groove (13-1-1) on the outer surface of the motor, a motor front end axial air groove (13-1-3) and a motor front end radial air groove (13-1-2) communicated with the motor front end axial air groove to form a coherent main body air passage (13-1), the air passage (7-2) is connected with the main body air groove (7-1) at the front end of the main body (7) and the main body air groove (7-1), the main shaft front sleeve air groove (2-1) is formed in the matched part of the main shaft front sleeve (2) and the front bearing (1-7), and is formed by three circumferentially uniformly distributed motor front end axial air grooves (13-1-3) and motor front end surface radial air grooves (13-1-2) to form a coherent air passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970761.3A CN107553283B (en) | 2017-10-18 | 2017-10-18 | Hand-held electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970761.3A CN107553283B (en) | 2017-10-18 | 2017-10-18 | Hand-held electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107553283A CN107553283A (en) | 2018-01-09 |
| CN107553283B true CN107553283B (en) | 2023-07-18 |
Family
ID=60986603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710970761.3A Active CN107553283B (en) | 2017-10-18 | 2017-10-18 | Hand-held electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107553283B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3959036A4 (en) | 2019-06-12 | 2023-03-29 | Milwaukee Electric Tool Corporation | Rotary power tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201333656Y (en) * | 2008-12-25 | 2009-10-28 | 永康市正大实业有限公司 | Hand-held dust-proof angular grinding and polishing machine |
| CN102149515A (en) * | 2009-01-30 | 2011-08-10 | 日立工机株式会社 | Power tool |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH315437A (en) * | 1954-10-30 | 1956-08-15 | Duss Maschf | Electric tools, especially for electric hand grinding |
| JPS5048287U (en) * | 1973-08-28 | 1975-05-13 | ||
| DE3219696A1 (en) * | 1982-05-26 | 1983-12-01 | Robert 5446 Engeln Wolff | Drive machine for tools, in particular in a small type of construction |
| WO1996019156A1 (en) * | 1994-12-22 | 1996-06-27 | Moskovsky Gosudarstvenny Aviatsionny Institut (Tekhnichesky Universitet) | Dental drilling device |
| DE29622019U1 (en) * | 1996-12-18 | 1998-04-16 | Bosch Gmbh Robert | Hand tool |
| AUPQ618800A0 (en) * | 2000-03-10 | 2000-04-06 | Bayly Design Associates Pty Ltd | Power tool |
| JP5989452B2 (en) * | 2012-08-17 | 2016-09-07 | 株式会社マキタ | Electric tool |
| WO2016002541A1 (en) * | 2014-06-30 | 2016-01-07 | 日立工機株式会社 | Electric tool |
| CN104191356B (en) * | 2014-09-25 | 2017-01-18 | 桂林桂北机器有限责任公司 | Pressurized sealing water-proof and dust-proof anti-collision grinding head |
| CN205765440U (en) * | 2016-07-22 | 2016-12-07 | 曹集林 | A kind of novel electric brushless polisher handle |
| CN207309647U (en) * | 2017-10-18 | 2018-05-04 | 福州集力电子技术研究所 | Electric hand tool |
-
2017
- 2017-10-18 CN CN201710970761.3A patent/CN107553283B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201333656Y (en) * | 2008-12-25 | 2009-10-28 | 永康市正大实业有限公司 | Hand-held dust-proof angular grinding and polishing machine |
| CN102149515A (en) * | 2009-01-30 | 2011-08-10 | 日立工机株式会社 | Power tool |
Non-Patent Citations (1)
| Title |
|---|
| 冷却系统湿法研磨砂磨机;位世阳;机床与液压;34-36 * |
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| Publication number | Publication date |
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| CN107553283A (en) | 2018-01-09 |
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Effective date of registration: 20231130 Address after: Room 101-2, 108-2, 1st Floor, Building 1-2, Wuyi Zhigu Software Park, No.1 Tongyou Street, Jianyang District, Nanping City, Fujian Province, 354299 Patentee after: Nanping Zhichuang Technology Service Co.,Ltd. Address before: 350001 501, 10th floor, Xiannan commercial building, 89 bay17 North Road, Gulou District, Fuzhou City, Fujian Province Patentee before: FUZHOU JILI ELECTRONIC TECHNOLOGY Research Institute |