CN110601404A - Brushless inner rotor motor and application - Google Patents
Brushless inner rotor motor and application Download PDFInfo
- Publication number
- CN110601404A CN110601404A CN201911004280.2A CN201911004280A CN110601404A CN 110601404 A CN110601404 A CN 110601404A CN 201911004280 A CN201911004280 A CN 201911004280A CN 110601404 A CN110601404 A CN 110601404A
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- CN
- China
- Prior art keywords
- rotor
- motor
- hole
- triangular
- shaft
- 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
Abstract
The invention discloses a brushless inner rotor motor and application, the brushless inner rotor motor comprises a motor shaft, a stator and a rotor; the rotor is rotatably arranged at the inner side of the stator; one side of the rotor is provided with a fan blade; the center of the rotor is transversely provided with a shaft hole, and a motor shaft is inserted into the shaft hole; the outer side of the shaft hole is provided with an air port which is arranged on the rotor along the axial direction of the motor shaft; a triangular hole is arranged between the air port and the shaft hole, the position of the triangular hole corresponds to the position of the air port on the outer side of the triangular hole, and the triangular hole is formed in the rotor; brushless inner rotor motors are used in hand-held power tools; the brushless inner rotor motor can realize ventilation and heat dissipation of the motor by arranging the through air ports and the triangular holes on the rotor, and the motor has higher power due to good cooling and heat dissipation effects; in addition, the weight of the rotor is reduced by arranging the air ports and the triangular holes on the rotor, the inertia force of the rotor is reduced after the weight of the rotor is reduced, the rotating speed of the motor is increased, the power consumption of the motor is lower, and the energy-saving and environment-friendly effects are achieved.
Description
Technical Field
The present invention relates to motors and applications, and particularly to a brushless inner rotor motor and applications thereof.
Background
Brushless motors have been widely used in recent years, and compared with conventional brush motors, brushless motors have the advantages of low noise, high energy efficiency, durability, and the like; however, the brushless motor in the prior art often has the defect of insufficient heat dissipation due to the fact that a large amount of heat is released in the operation process of the brushless motor, and the upper limit of the power of the brushless motor is limited due to poor heat dissipation effect; in addition, the brushless motor in the prior art has high power consumption in the running process and is not energy-saving.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a brushless inner rotor motor and application thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: a brushless inner rotor motor comprises a motor shaft, a stator and a rotor; the rotor is rotatably arranged at the inner side of the stator; one side of the rotor is provided with a fan blade; the center of the rotor is transversely provided with a shaft hole, and a motor shaft is inserted into the shaft hole; a first bearing and a second bearing are respectively arranged at two ends of the motor shaft;
the outer side of the shaft hole is provided with an air port which is arranged on the rotor along the axial direction of the motor shaft; a triangular hole is arranged between the air port and the shaft hole, the position of the triangular hole corresponds to the position of the air port on the outer side of the triangular hole, and the triangular hole is formed in the rotor.
Furthermore, the triangular hole is a first triangular hole which is communicated with the air opening on the outer side of the first triangular hole.
Furthermore, the triangular hole is a second triangular hole, and the second triangular hole is spaced from the tuyere on the outer side of the second triangular hole.
Furthermore, the number of the air ports is multiple, and the air ports are symmetrical about the shaft hole; the triangular holes are multiple and are symmetrical about the shaft hole.
The brushless inner rotor motor is applied to a handheld electric tool.
Further, hand-held power tools include electric hammers, electric picks, electric grinders, electric planes, aircraft drills, concrete vibrators, angle grinders, mixers, aluminum saws, wall grinders, water drills, brushless wrenches, brushless blowers, marble machines, and profile cutters.
The brushless inner rotor motor can realize ventilation and heat dissipation of the motor by arranging the through air ports and the triangular holes on the rotor, effectively improves the heat dissipation effect of the brushless inner rotor motor, can cool the motor, and has higher power due to good cooling and heat dissipation effects of the motor; in addition, the weight of the rotor is reduced by arranging the air port and the triangular hole on the rotor, the inertia force of the rotor is reduced after the weight of the rotor is reduced, the rotating speed of the motor is increased, the power consumption of the motor is lower, and the energy-saving and environment-friendly effects are achieved.
Drawings
Fig. 1 is a schematic structural view of a brushless inner rotor motor.
FIG. 2 is a schematic cross-sectional view of a rotor with a first triangular hole.
FIG. 3 is a schematic cross-sectional view of a rotor with a second triangular hole.
FIG. 4 is a schematic diagram showing the position relationship between the second triangular hole and the magnetic induction lines of the motor magnetic field.
In the figure: 1. a motor shaft; 2. a first bearing; 3. a stator; 4. a rotor; 5. a fan blade; 6. a second bearing; 7. a shaft hole; 8. a tuyere; 9. a first triangular hole; 10. a second triangular hole; 11. and (4) magnetic induction lines.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a brushless inner rotor motor includes a motor shaft 1, a stator 3, a rotor 4; the rotor 4 is rotatably arranged inside the stator 3; one side of the rotor 4 is provided with a fan blade 5; a shaft hole 7 is transversely formed in the center of the rotor 4, and the motor shaft 1 is inserted into the shaft hole 7; a first bearing 2 and a second bearing 6 are respectively arranged at two ends of the motor shaft 1;
an air port 8 is arranged on the outer side of the shaft hole 7, and the air port 8 is arranged on the rotor 4 along the axial direction of the motor shaft 1; a triangular hole is arranged between the air port 8 and the shaft hole 7, the position of the triangular hole corresponds to the position of the air port 8 on the outer side of the triangular hole, and the triangular hole is formed in the rotor 4.
The triangular hole can be a first triangular hole 9 or a second triangular hole 10; as shown in figure 2, the triangular hole is a first triangular hole 9, and the first triangular hole 9 is communicated with the tuyere 8 on the outer side. As shown in fig. 3, the triangular hole is a second triangular hole 10, and the second triangular hole 10 has a gap with the tuyere 8 outside thereof.
The number of the air ports 8 is multiple, and the air ports are symmetrical about the shaft hole 7; the triangular holes are a plurality of which are symmetrical about the shaft hole 7.
A plurality of tuyeres, a plurality of triangle hole all make rotor 4's whole weight distribution even about shaft hole 7 symmetry sets up, guarantee rotor 4 stability in high-speed rotatory working process.
As shown in fig. 4, the triangular holes formed on the rotor 4 of the brushless inner rotor motor of the present invention are located in the blank areas of the magnetic induction lines of the magnetic field of the motor, and the magnetic force of the motor is not affected by the triangular holes formed in the blank areas of the magnetic induction lines; the brushless inner rotor motor can realize ventilation and heat dissipation of the motor by arranging the through air opening 8 and the triangular hole on the rotor 4, effectively improves the heat dissipation effect of the brushless inner rotor motor, can cool the motor, has good cooling and heat dissipation effects because the upper power limit of the motor is limited by temperature, can have larger power, and has higher power and higher efficiency under the condition of the same volume and size.
The motor of the invention has the advantages that the tuyere 8 and the triangular hole are arranged on the rotor 4, so that the weight of the rotor 4 is reduced; the motor in the prior art is not provided with the through hole on the inner rotor, the weight is heavier, the inertia force is large, the power consumption is larger and the current is larger when the same rotating speed as the motor is achieved in the using process; and the inertia force of the rotor 4 of the motor is reduced after the weight of the rotor is reduced, the rotating speed of the brushless inner rotor motor is increased, and the motor has the advantages of lower power consumption, lower current, more energy conservation and environmental protection when the same rotating speed as that of the motor in the prior art is achieved.
Brushless inner rotor motors are used in hand held power tools. Hand-held power tools include electric hammers, electric picks, electric grinders, electric planers, aircraft drills, concrete vibrators, angle grinders, mixers, aluminum saws, wall grinders, water drills, brushless wrenches, brushless blowers, marble machines, and profile cutters.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (6)
1. A brushless inner rotor motor, characterized in that: comprises a motor shaft (1), a stator (3) and a rotor (4); the rotor (4) is rotatably arranged on the inner side of the stator (3); one side of the rotor (4) is provided with a fan blade (5); the center of the rotor (4) is transversely provided with a shaft hole (7), and the motor shaft (1) is inserted into the shaft hole (7); a first bearing (2) and a second bearing (6) are respectively arranged at two ends of the motor shaft (1);
an air port (8) is formed in the outer side of the shaft hole (7), and the air port (8) is formed in the rotor (4) along the axial direction of the motor shaft (1); a triangular hole is arranged between the air port (8) and the shaft hole (7), the position of the triangular hole corresponds to the position of the air port (8) on the outer side of the triangular hole, and the triangular hole is formed in the rotor (4).
2. The brushless inner rotor motor of claim 1, wherein: the triangular hole is a first triangular hole (9), and the first triangular hole (9) is communicated with the air opening (8) on the outer side of the first triangular hole.
3. The brushless inner rotor motor of claim 1, wherein: the triangular hole is a second triangular hole (10), and the second triangular hole (10) is spaced from the tuyere (8) on the outer side of the second triangular hole.
4. A brushless inner rotor motor according to claim 2 or 3, wherein: the number of the air ports (8) is multiple, and the air ports are symmetrical about the shaft hole (7); the triangular holes are multiple and are symmetrical about the shaft hole (7).
5. Use of a brushless inner rotor motor according to any of claims 1-3, wherein: the brushless inner rotor motor is applied to a handheld electric tool.
6. Use of a brushless inner rotor motor according to claim 5, wherein: hand-held type electric tool includes electric hammer, electric pick, electric grinder, electric planer, aircraft brill, concrete vibrator, angle mill, mixer, saw aluminium machine, wall polisher, water bores, brushless spanner, brushless hair-dryer, marble machine and section bar cutting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911004280.2A CN110601404A (en) | 2019-10-22 | 2019-10-22 | Brushless inner rotor motor and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911004280.2A CN110601404A (en) | 2019-10-22 | 2019-10-22 | Brushless inner rotor motor and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110601404A true CN110601404A (en) | 2019-12-20 |
Family
ID=68851391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911004280.2A Pending CN110601404A (en) | 2019-10-22 | 2019-10-22 | Brushless inner rotor motor and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110601404A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671132A (en) * | 2020-12-05 | 2021-04-16 | 江苏铁锚工具股份有限公司 | Multi-pair-pole direct-drive inner rotor motor, electric chain saw and cutting machine |
-
2019
- 2019-10-22 CN CN201911004280.2A patent/CN110601404A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671132A (en) * | 2020-12-05 | 2021-04-16 | 江苏铁锚工具股份有限公司 | Multi-pair-pole direct-drive inner rotor motor, electric chain saw and cutting machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 226000 88 tieanchor Road, Binhai New Area, Haimen District, Nantong City, Jiangsu Province Applicant after: Jiangsu anchor Tools Co.,Ltd. Address before: 226100 No.88 tieanchor Road, Binhai New Area, Haimen City, Nantong City, Jiangsu Province Applicant before: JIANGSU ANCHOR TOOLS Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230718 Address after: 226100 Room 10, No. 88 Tiebao Road, Baochang Town, Haimen District, Nantong City, Jiangsu Province Applicant after: Jiangsu Tengya Iron Anchor Tool Co.,Ltd. Address before: 226000 88 tieanchor Road, Binhai New Area, Haimen District, Nantong City, Jiangsu Province Applicant before: Jiangsu anchor Tools Co.,Ltd. |