CN218586977U - External rotor electric machine and have garden equipment of external rotor electric machine - Google Patents
External rotor electric machine and have garden equipment of external rotor electric machine Download PDFInfo
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- CN218586977U CN218586977U CN202220770950.2U CN202220770950U CN218586977U CN 218586977 U CN218586977 U CN 218586977U CN 202220770950 U CN202220770950 U CN 202220770950U CN 218586977 U CN218586977 U CN 218586977U
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Abstract
The utility model provides an external rotor motor, which comprises an external rotor, a stator bracket, an output shaft and an end cover; the outer rotor is fixedly connected with the end cover, the end cover is fixedly connected with the output shaft, the stator is fixedly connected with the stator support, the output shaft is positioned at the centers of the stator and the stator support, the output shaft is connected with the stator and the stator support in a rotating fit manner, and a gap is formed between the stator and the outer rotor; the outer rotor comprises a casing, the outer diameter of the casing is less than or equal to 60mm, and the design rated power of the outer rotor motor is more than or equal to 1000W. The utility model provides a pair of external rotor electric machine for the motor lightweight lets the motor have characteristics small, that power is big, under the powerful prerequisite of not losing, reduces whole machine size and reduces whole machine weight.
Description
Technical Field
The utility model relates to a gardens facility technical field especially relates to an external rotor electric machine and have external rotor electric machine's garden equipment.
Background
A chain saw is an electric tool for cutting with a revolving chain saw blade. Conventional electric chain saws generally use a powerful motor, and thus the motor thereof has a large volume. When the traditional chain saw motor reaches 1000W or more, the volume is large: the diameter is about 70mm to 90mm; the weight is big: about 1kg. So that the chain saw is not portable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external rotor electric machine for the motor lightweight lets the motor have characteristics small, that power is big, under the powerful prerequisite of not losing, reduces whole machine size and reduces complete machine weight, can be used for solving the problem that proposes among the above-mentioned background art.
In order to achieve the purpose, the utility model adopts the technical scheme that the external rotor motor comprises an external rotor, a stator bracket, an output shaft and an end cover; the outer rotor is fixedly connected with the end cover, the end cover is fixedly connected with the output shaft, the stator is fixedly connected with the stator support, the output shaft is positioned at the centers of the stator and the stator support, the output shaft is connected with the stator and the stator support in a rotating fit manner, and a gap is formed between the stator and the outer rotor;
the outer rotor comprises a casing, the outer diameter of the casing is less than or equal to 60mm, and the design rated power of the outer rotor motor is more than or equal to 1000W.
Further, the stator includes a stator core and a winding; the outer rotor also comprises magnets, the magnets are distributed on the inner surface of the shell, the shell is fixedly connected with the end cover, and a gap is formed between the stator and the magnets;
wherein, the outer diameter of the casing is less than or equal to 50mm.
Furthermore, the rated power of the outer rotor motor is not less than 1200W.
Further, the outer rotor motor is a fractional slot winding motor.
Furthermore, the length of the stator core is h, and h is more than or equal to 15mm and less than or equal to 50mm.
Further, the stator core includes salient poles and salient pole teeth, and notches are formed between adjacent salient pole teeth;
wherein the width w of the notch is 1.5 mm-3 mm.
Furthermore, an outer rotor motor with the rated power of 800W-1200W is designed, and the sectional area of a winding is more than or equal to 0.9mm 2 。
Furthermore, an outer rotor motor with the rated power of 500W-800W is designed, and the sectional area of a winding is more than or equal to 0.7mm 2 。
Further, an outer rotor motor with rated power less than 500W is designed, and the sectional area of a winding is more than or equal to 0.6mm 2 。
Furthermore, the rated voltage of the outer rotor motor is less than or equal to 48V, and the rated rotating speed of the outer rotor motor is more than or equal to 10000 r/min.
Furthermore, the rated voltage of the outer rotor motor is 36V, and the rated rotating speed of the outer rotor motor is more than or equal to 18000 r/min.
A garden tool comprises the outer rotor motor.
To sum up, the beneficial effects of the utility model are that: the utility model provides a pair of external rotor electric machine for the motor lightweight lets the motor have characteristics small, that power is big, under the powerful prerequisite of not losing, reduces whole machine size and reduces complete machine weight. The utility model discloses a motor volume is less, and the external rotor external diameter is only 50mm, and weight is little simultaneously, about 400g, but its power can reach 1200W.
The utility model discloses an external rotor motor can be applied to electronic garden instrument, like pruner, electric chain saw etc..
Drawings
Fig. 1 is a schematic view of the overall structure of an outer rotor motor in embodiment 1;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is an exploded view of the output shaft;
fig. 4 is a sectional view of an outer rotor motor in embodiment 1;
fig. 5 is a schematic view and a partially enlarged schematic view of a stator core in embodiment 1;
fig. 6 shows a garden tool with an external rotor motor according to embodiment 2.
Detailed Description
In the following description of the embodiments of the present invention, reference is made to the accompanying drawings, which are not intended to limit the invention to the particular embodiments disclosed, but rather to limit the invention in any manner, all features disclosed in the embodiments of the invention, or all steps in any method or process disclosed, except features and/or steps that are mutually exclusive.
Example 1 is shown in FIGS. 1 to 5.
The utility model provides an external rotor motor, which comprises an external rotor 10, a stator 20, a stator bracket 30, an output shaft 40 and an end cover 50; the outer rotor 10 is fixedly connected with the end cover 50, the end cover 50 is fixedly connected with the output shaft 40, the stator 20 is fixedly connected with the stator support 30, the output shaft 40 is located at the center of the stator 20 and the stator support 30, the output shaft 40 is connected with the stator 20 and the stator support 30 in a rotating fit mode, and a gap exists between the stator 20 and the outer rotor 10.
Preferably, the outer rotor 10 comprises a casing 11, the outer diameter of the casing 11 is less than or equal to 60mm, and the designed rated power of the outer rotor motor is more than or equal to 1000W. Furthermore, the rated power of the outer rotor motor is not less than 1200W. Furthermore, the outer diameter of the casing 11 is less than or equal to 50mm. In the present embodiment, the housing 11 has an outer diameter =50mm.
Preferably, the stator 20 includes a stator core and windings (the windings are not shown in the drawing); the outer rotor 10 further comprises magnets 12, the magnets 12 are distributed on the inner surface of the casing 11, the casing 11 is fixedly connected with the end cover 50, and a gap exists between the stator 20 and the magnets 12. Further, the magnet 12 is illustratively a permanent magnet.
Preferably, the utility model discloses an external rotor electric machine is fractional slot winding motor. Exemplarily, in the present embodiment, 10 magnets 12 are provided, and 12 salient poles 21 are provided.
Preferably, the stator core is formed by stacking silicon steel sheets, and the stacking height (the length of the stator core) of the silicon steel sheets is more than or equal to 15mm and less than or equal to h and less than or equal to 50mm; the winding is copper wire concentrated winding, triangle connection. In the present embodiment, h =20mm. In some other embodiments, such as a motor rated at 1200W, the length of the stator 20 is preferably 35mm.
Preferably, the stator core includes salient poles 21 and salient pole teeth 22, and notches 23 are formed between the adjacent salient pole teeth 22. The width w of the notch 23 is 1.5mm to 3mm. Illustratively, in the present embodiment, the width w of the notch 23 is 2.5mm.
Preferably, the end cover 50 is provided with a fan blade 51. When the outer rotor 10 rotates, the fan blades 51 on the end cover 50 are driven to rotate together, and the fan blades 51 rotate to provide cooling air flow.
Preferably, the output shaft 40 includes a shaft body 41, a first bearing 42 and a second bearing 43 are disposed on the shaft body 41, the first bearing 42 is embedded in the stator bracket 30, and the second bearing 43 is embedded in the stator 20. More specifically, the stator bracket 30 is provided with a first mounting hole 31, the first mounting hole 31 is used for mounting a first bearing 42, the outer side of the first bearing 42 is connected with the first mounting hole 31, and the inner side of the first bearing 42 is connected with the shaft body 41. Be equipped with second mounting hole 24 in the stator core, be equipped with extension 32 on the stator support 30, extension 32 can extend and enter into in second mounting hole 24 and with second mounting hole 24 fixed connection, in addition, second mounting hole 24 can be used for installing second bearing 43, the second bearing 43 outside and second mounting hole 24 fixed connection, the inboard and the axis body 41 fixed connection of second bearing 43.
Preferably, the output shaft 40 has threads 52 on one end, and the output shaft 40 has a striation 44 on the other end, the striation 44 of the output shaft 40 being positioned for connection to the end cap 50. Further, the stripe structure 44 of the output shaft 40 is connected with the central position of the fan blade 51.
Preferably, the output shaft 40 is provided with a positioning slot 45, the positioning slot 45 can be used for fixing an axial clamp spring 46, and the clamp spring 46 is located at a position outside the first bearing 42. Further, a gasket 47 is arranged between the first bearing 42 and the clamp spring 46.
For the outer rotor motors with different rated powers, the cost of the motor can be reduced as far as possible on the premise of meeting the current requirement by selecting different winding wire diameters. In the present embodiment, the rated voltage of the outer rotor motor is less than or equal to 48V, and preferably, the rated voltage of the outer rotor motor is 36V. In the embodiment, the rated rotation speed of the outer rotor motor is greater than or equal to 10000 rpm, and preferably, the rated rotation speed of the outer rotor motor is greater than or equal to 18000 rpm.
Preferably, the external rotor motor with rated power of 800W-1200W is designed, and the sectional area of the winding is more than or equal to 0.9mm 2 Furthermore, the winding is 14-16 copper wires with the wire diameter of 0.28mm (the cross section area is 0.0647 mm) 2 ) Are connected in parallel. Illustratively, the winding is formed by connecting 15 copper wires with the wire diameter of 0.28mm in parallel, and the cross section area of the winding is 0.9705mm2.
Preferably, the outer rotor motor with the rated power of 500W-800W is designed, and the sectional area of the winding is more than or equal to 0.7mm 2 Furthermore, the sectional area of the winding is 0.7764mm 2 ～0.9058mm 2 Within the interval. Illustratively, the winding is formed by connecting 12-14 copper wires with the wire diameter of 0.28mm in parallel.
Preferably, the outer rotor motor with rated power less than 500W is designed, and the sectional area of the winding is more than or equal to 0.6mm 2 Furthermore, the winding is formed by connecting 8-10 copper wires with the wire diameter of 0.28mm in parallel. Illustratively, the winding is formed by connecting 10 copper wires with the wire diameter of 0.28mm in parallel.
Example 2, see figure 6.
The embodiment provides a garden tool, which comprises the external rotor motor in the embodiment 1, wherein the external rotor motor comprises a machine shell 11, the outer diameter of the machine shell 11 is less than or equal to 60mm, and the rated power of the external rotor motor is more than or equal to 1000W.
Illustratively, the garden tool is a chain saw, and the chain saw includes a body 70, an external rotor motor and a battery pack 80 are arranged in the body 70, the external rotor motor is connected with a saw chain 60, and a rear handle 90 is arranged on the body 70.
Other embodiments of this example are the same as example 1.
The above description is only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through creative work should be covered within the protection scope of the present invention, and therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (9)
1. An outer rotor motor is characterized by comprising an outer rotor, a stator bracket, an output shaft and an end cover; the outer rotor is fixedly connected with the end cover, the end cover is fixedly connected with the output shaft, the stator is fixedly connected with the stator support, the output shaft is positioned at the centers of the stator and the stator support, the output shaft is connected with the stator and the stator support in a rotating fit manner, and a gap is formed between the stator and the outer rotor; the stator comprises a stator iron core and a winding;
wherein, the outer rotor comprises a casing, the outer diameter of the casing is less than or equal to 60mm, the designed rated power of the outer rotor motor is more than or equal to 500W, and the sectional area of the winding is more than or equal to 0.7mm 2 。
2. The external rotor electric machine of claim 1, wherein the external rotor further comprises magnets distributed on the inner surface of the casing, the casing is fixedly connected with the end cover, and a gap is formed between the stator and the magnets;
wherein, the outer diameter of the casing is less than or equal to 50mm.
3. The external rotor electric machine according to claim 2, wherein the external rotor electric machine is a fractional slot winding electric machine.
4. The external rotor electric machine according to claim 2, wherein the length of the stator core is h,15mm ≤ h ≤ 50mm.
5. The external rotor electric machine of claim 2, wherein the stator core includes salient poles and salient pole teeth, and notches are formed between adjacent salient pole teeth;
wherein the width w of the notch is 1.5 mm-3 mm.
6. The external rotor motor according to claim 2, wherein the external rotor motor with 800-1200W rated power is designed, and the cross-sectional area of the winding is more than or equal to 0.9mm 2 。
7. The external rotor motor according to claim 1, wherein the rated voltage of the external rotor motor is less than or equal to 48V, and the rated rotation speed of the external rotor motor is greater than or equal to 10000 rpm.
8. The external rotor electric machine according to claim 7, wherein the rated voltage of the external rotor electric machine is 36V, and the rated rotation speed of the external rotor electric machine is greater than or equal to 18000 r/min.
9. A garden apparatus, comprising the outer rotor motor according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220770950.2U CN218586977U (en) | 2022-03-31 | 2022-03-31 | External rotor electric machine and have garden equipment of external rotor electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220770950.2U CN218586977U (en) | 2022-03-31 | 2022-03-31 | External rotor electric machine and have garden equipment of external rotor electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218586977U true CN218586977U (en) | 2023-03-07 |
Family
ID=85358578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220770950.2U Active CN218586977U (en) | 2022-03-31 | 2022-03-31 | External rotor electric machine and have garden equipment of external rotor electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218586977U (en) |
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2022
- 2022-03-31 CN CN202220770950.2U patent/CN218586977U/en active Active
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