CN218958641U - Mounting piece, stator and electric tool - Google Patents
Mounting piece, stator and electric tool Download PDFInfo
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- CN218958641U CN218958641U CN202223508567.9U CN202223508567U CN218958641U CN 218958641 U CN218958641 U CN 218958641U CN 202223508567 U CN202223508567 U CN 202223508567U CN 218958641 U CN218958641 U CN 218958641U
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- mounting
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- stator core
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Abstract
The utility model discloses a mounting piece, a stator and an electric tool, wherein the mounting piece is used for mounting a stator core, the mounting piece comprises a main body part, a matching part formed by extending upwards from the main body part and a first central hole penetrating through the matching part along a first direction opposite to the mounting direction, the matching part is provided with a plurality of mounting holes with outwards openings along the first direction, the mounting holes are arranged at intervals and are positioned at the periphery of the first central hole, the mounting piece also comprises a fixing piece and a baffle plate used for fixing the matching part and the stator core through the fixing piece, the baffle plate is provided with a second central hole corresponding to the first central hole and a matching hole aligned with the mounting hole and used for matching with the fixing piece, and the matching hole is positioned at the periphery of the second central hole.
Description
Technical Field
The utility model relates to the field of electric tools, in particular to a stator of an outer rotor motor on an electric tool and a mounting piece for the stator.
Background
The traditional external rotor motor mostly uses aluminum brackets, namely cast aluminum end covers, to be inserted in a stator core, the aluminum brackets, namely the stator brackets, are in interference fit with the stator core, the bonding force between the aluminum brackets and the stator core is ensured, related existing patents can refer to China patent No. 212462942U published by 2 months of 2021, the external rotor motor end cover structure disclosed by the patent comprises the cast aluminum end cover 3 and the stator core 2, a supporting cylinder 1 is integrally formed on the cast aluminum end cover 3, the stator core 2 is in interference fit with the supporting cylinder 1, the stator core 2 is arranged on the supporting cylinder 1 in a press-in manner, the cast aluminum end cover is in interference fit with the stator core, and when the end covers are pressed into the stator core, the contact surface of the cast aluminum end cover and the stator core can generate extrusion aluminum overflow phenomenon due to the fact that the difference of material properties of steel and aluminum is lower than iron, and the interference magnitude is too large, so that cut aluminum materials form burrs and aluminum scraps.
When the motor is in severe working conditions like high-frequency vibration, the stator core may have the risk of axial movement, so that the motor performance is reduced and even parts are damaged due to collision with the rotor wiper. In addition, the aluminum bracket and the stator core are in interference fit, if defective products are found in the production process, the aluminum bracket and the stator core are already riveted, the reworking difficulty is high, parts after reworking cannot be put into production again, and the scrapping cost is too high.
In view of the foregoing, there is a great need for improvements in the prior art power tools and stator structures thereof that overcome the drawbacks of the prior art.
Disclosure of Invention
In view of the shortcomings of the prior art, an object of the present utility model is to provide a mounting member, a stator and an electric tool with improved stability after mounting.
The technical scheme adopted for solving the problems in the prior art is as follows:
in a first aspect, the present utility model provides a mounting piece for mounting a stator core, where the mounting piece includes a main body portion, a mating portion extending upward from the main body portion, and a first central hole penetrating through the mating portion in a first direction opposite to the mounting direction, where the mating portion is provided with a plurality of mounting holes with openings facing outward in the first direction, the mounting holes are arranged at intervals and located at a periphery of the first central hole, and the mounting piece further includes a fixing piece, and a baffle for fixing the mating portion and the stator core through the fixing piece, where the baffle is provided with a second central hole corresponding to the first central hole and a mating hole aligned with the mounting hole and used for mating with the fixing piece, and where the mating hole is located at a periphery of the second central hole.
The further improvement scheme is as follows: the baffle includes a first ring and a second ring protruding from the first ring in the mounting direction, and a step is formed between the second ring and the first ring.
The further improvement scheme is as follows: the fitting hole penetrates the first ring and the second ring in the installation direction.
The further improvement scheme is as follows: the main body portion is provided with a support surface for abutting against the stator core in a first direction.
The further improvement scheme is as follows: the main body part also comprises a concave hole positioned outside the supporting surface.
In a second aspect, the present utility model provides a stator, including a stator core, a coil winding mounted on the stator core, and a mounting member for mounting the stator core, where the mounting member is the foregoing mounting member, and the stator core is fixed between a baffle plate and a main body in an axial direction.
The further improvement scheme is as follows: the stator core is provided with a third central hole, the inner diameter of the third central hole is larger than the diameter of the matching part, and the mounting piece and the stator core are in clearance fit along the radial direction.
The further improvement scheme is as follows: and a press-fit surface is arranged in the third central hole, and the baffle supports against the press-fit surface along the installation direction.
The further improvement scheme is as follows: the baffle is received in the third central bore without extending beyond the third central bore in the first direction.
In a third aspect, the present utility model provides a power tool, including a stator and a rotor located at the periphery of the stator for rotating around the stator, wherein the stator is the stator.
Compared with the prior art, the mounting part is provided with the plurality of mounting holes with outward openings along the first direction, the mounting holes are arranged at intervals and are positioned at the periphery of the first central hole, the mounting part also comprises a fixing part and a baffle plate for fixing the mounting part and the stator core through the fixing part, the baffle plate is provided with the second central hole corresponding to the first central hole and the mounting hole aligned with the mounting hole and used for being matched with the fixing part, and the mounting hole is positioned at the periphery of the second central hole, so that the finish turning process required by producing the mounting part is reduced, and the cost is saved; in addition, the stability after installation is ensured, the stator core can not generate axial movement under severe working conditions, and the reliability of product use is effectively ensured. If defective products are found in the subsequent process during production, the defective products can be disassembled in time, and the disassembled parts can still be normally used, so that the production scrapping cost is greatly reduced, the product cost is effectively reduced, the competitiveness of the product is improved, and the development trend of the product technology is met.
Drawings
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:
FIG. 1 is a schematic view showing a combination of a mounting member, a stator core, a baffle plate and a fixing member according to a preferred embodiment of the present utility model;
FIG. 2 is a schematic view showing a combination of a mounting member, a baffle plate and a fixing member according to a preferred embodiment of the present utility model;
FIG. 3 is a schematic view of a mounting member in a preferred embodiment of the utility model;
FIG. 4 is a schematic view of a baffle in a preferred embodiment of the present utility model;
FIG. 5 is a schematic view of another angle of FIG. 4;
fig. 6 is a schematic view of a stator core in a preferred embodiment of the present utility model;
fig. 7 is a schematic view of another angle of fig. 6.
Detailed Description
The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Words such as "upper", "lower", "front", "rear", etc., indicating an azimuth or a positional relationship are based on only the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
Referring to fig. 1 to 3, a mounting member 1 according to a preferred embodiment of the present utility model is used for mounting a stator core 2 of an external rotor motor, where the mounting member 1 may be a stator bracket, and includes a main body portion 11 at the bottom, a mating portion 12 extending upward from the main body portion 11, and a first central hole 10 extending through the mating portion 12 from the bottom of the main body portion 11 in a first direction opposite to the mounting direction. The top end of the matching part 12 is provided with a plurality of mounting holes 13 with outward openings, namely upward openings, for fixing the fixing piece 3, and the mounting holes 13 are arranged at intervals and are positioned at the periphery of the first center hole 10.
The mating portion 12 includes a first section 121 and a second section 122 that are connected to each other, and the mounting hole 13 is formed in the second section 122, and a radial dimension of the second section 122 is smaller than a radial dimension of the first section 121. Referring to fig. 2, the mounting direction is a top-down direction, i.e., a direction opposite to a direction in which the fitting portion 12 extends from the main body portion 11. The first central hole 10 is used for accommodating a rotating shaft of a stator. The first center hole 10 may also be provided to penetrate the main body portion 11 downward in the mounting direction.
Referring to fig. 2, the mounting member 1 further includes the fixing member 3, a baffle 4 for fixing the engaging portion 12 and the stator core 2 by the fixing member 3, the baffle 4 is provided with a second central hole 40 corresponding to the first central hole 10, and an engaging hole 41 aligned with the mounting hole 13 for engaging with the fixing member 3, and the engaging hole 41 is located at the periphery of the second central hole 40. The centers of the second center hole 40 and the first center hole 10 are located on the axis of the fitting portion 12. In a preferred embodiment, the main body 11 and the mating portion 12 of the mounting member 1 are brackets made of aluminum, the fixing member 3 may be bolts or screws, the number of the mounting holes 13 is three, and the three mounting holes 13 are located on the same circumference and are spaced apart from each other by the same distance.
The baffle 4 includes a first ring 43 and a second ring 42 protruding from the first ring 43 along the installation direction, the radial dimension of the first ring 43 is greater than the radial dimension of the second ring 42, a stepped shape is formed between the second ring 42 and the first ring 43, as shown in fig. 6, the stator core 2 is matched with the stepped structure, and a first through hole 21 and a second through hole 22 with different pore sizes are correspondingly provided, and are respectively used for accommodating the first ring 43 and the second ring 42 of the baffle 4, and the inner diameter of the first through hole 21 is greater than the inner diameter of the second through hole 22. In a preferred embodiment, the first ring 43 and the second ring 42 are both circular ring structures. The fitting hole 41 penetrates the first ring 43 and the second ring 42 in the mounting direction.
The main body 11 is provided with a supporting surface 111 for supporting the stator core 2 along a first direction, namely upwards, the main body 11 further comprises a concave hole 112 positioned at the outer side of the supporting surface 111, and the concave hole 112 can be a through hole which is vertically communicated, so that the heat dissipation effect of the stator is improved, the material consumption of an installation piece is reduced, and the product cost is reduced.
The preferred embodiment of the utility model also relates to a stator, which comprises a stator core 2, a coil winding arranged on the stator core and a mounting piece 1 for mounting the stator core 2, wherein the mounting piece 1 is the mounting piece, the stator core 2 is axially fixed between the baffle 4 and the main body 11 to realize the locked effect, the bearing capacity is enhanced, the stator core cannot axially float under severe working conditions, and the normal operation of a motor cannot be influenced.
The stator is mainly used for motors of electric tools such as a rechargeable angle grinder, a rechargeable electric hammer, a rechargeable electric drill, a rechargeable electric wrench and the like.
The stator core 2 is provided with a third central hole 20, and the inner diameter of the third central hole 20 is larger than the diameter of the matching part 12, so that the matching part 12 of the mounting piece 1 and the stator core 2 are in clearance fit along the radial direction, when the stator core 2 is mounted on the mounting piece 1, the matching part 12 of the mounting piece 1 and the stator core 2 are not extruded along the radial direction, the matched part inside the stator core is not cut, deformed, burrs, aluminum scraps and the like are even formed, and the quality of the assembled stator is ensured; in addition, the portion of the fitting portion 12 adjacent to the stator core 2 in the radial direction does not need to be finish machined, the mounting machining process is reduced, and the machining cost is reduced. The fit portion 12 of the mounting piece 1 is in clearance fit with the stator core 2 along the radial direction, the mounting piece 1 and the stator core 2 can be disassembled without damage, the defective products can be found to be disassembled parts without damage in the later-stage process during production, and the disassembled parts without defects can be put into use again, so that the production scrapping cost is reduced.
The third central hole 20 is provided with a press-fit surface 23, and the baffle 4 is abutted against the press-fit surface 23 along the installation direction, namely downward. The baffle 4 is received in the third central bore 20 without extending beyond the third central bore 20 in the first direction.
The preferred embodiment of the utility model also relates to a power tool, which comprises a stator and a rotor which is arranged on the periphery of the stator and used for rotating around the stator, wherein the stator is the stator.
When mounting, first, the stator core 2 is first fitted over the fitting portion 12 of the mounting member 1 in the mounting direction, i.e., from top to bottom, and the fitting portion 12 extends into the third center hole 20 of the stator core 2 to be in clearance fit with the stator core 2 in the radial direction, while the support surface 111 of the main body 11 is abutted against and supported by the bottom of the stator core 2 in the first direction, i.e., from bottom to top. Next, the baffle plate 4 is fitted into the third center hole 20 of the stator core 2 in the mounting direction, the second ring 42 of the baffle plate 4 is axially aligned with and abutted against the fitting portion 12 of the mount 1, the first ring 43 of the baffle plate 4 is axially abutted against the press-fit surface 23 of the stator core 2, and the centers of the first center hole 10, the second center hole 40, and the third center hole 20 are located on the same axis, and the mounting hole 13 of the fitting portion 12 is axially aligned with the fitting hole 41 of the baffle plate 4. Finally, the fixing member 3 is fitted into the fitting hole 13 of the fitting portion 12 and the fitting hole 41 of the baffle plate 4 and fixes the fitting portion 12 and the baffle plate 4 together.
Compared with the prior art, the mounting part finish turning process is reduced, the cost is saved, meanwhile, the stator core cannot generate axial movement any more under severe working conditions, and the stability of product use is effectively ensured. During production, defective products can be timely disassembled after being found in the later-stage working procedure, and the disassembled parts can still be normally used, so that the production scrapping cost is greatly reduced, the product cost is effectively reduced, the competitiveness of the product is improved, and the development trend of the product technology is met.
The present utility model is not limited to the specific embodiments described above, and those skilled in the art will readily appreciate that many modifications are possible in the present utility model without materially departing from the principles and scope of the utility model. The protection scope of the present utility model is subject to the claims.
Claims (10)
1. A mounting for install stator core, the mounting includes main part, the cooperation portion that upwards extends from main part and runs through the first centre bore of cooperation portion along the first direction opposite with the installation direction, its characterized in that: the mounting part is provided with a plurality of mounting holes with outward openings along a first direction, the mounting holes are arranged at intervals and are positioned at the periphery of the first central hole, the mounting part further comprises a fixing part and a baffle plate used for fixing the mounting part and the stator core through the fixing part, the baffle plate is provided with a second central hole corresponding to the first central hole and a mounting hole aligned with the mounting hole and used for being matched with the fixing part, and the mounting hole is positioned at the periphery of the second central hole.
2. The mount according to claim 1, wherein: the baffle includes a first ring and a second ring protruding from the first ring in the mounting direction, and a step is formed between the second ring and the first ring.
3. The mount according to claim 2, wherein: the fitting hole penetrates the first ring and the second ring in the installation direction.
4. The mount according to claim 2, wherein: the main body portion is provided with a support surface for abutting against the stator core in a first direction.
5. The mount according to claim 4, wherein: the main body part also comprises a concave hole positioned outside the supporting surface.
6. The utility model provides a stator, includes stator core, installs the coil winding on stator core, is used for installing stator core's installed part, its characterized in that: the mount is the mount according to any one of claims 1 to 5, and the stator core is fixed between the baffle plate and the main body portion in the axial direction.
7. The stator of claim 6, wherein: the stator core is provided with a third central hole, the inner diameter of the third central hole is larger than the diameter of the matching part, and the mounting piece and the stator core are in clearance fit along the radial direction.
8. The stator of claim 7, wherein: and a press-fit surface is arranged in the third central hole, and the baffle supports against the press-fit surface along the installation direction.
9. The stator of claim 8, wherein: the baffle is received in the third central bore without extending beyond the third central bore in the first direction.
10. A power tool comprising a stator and a rotor located at the periphery of the stator for rotation about the stator, the stator being as claimed in any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223508567.9U CN218958641U (en) | 2022-12-27 | 2022-12-27 | Mounting piece, stator and electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223508567.9U CN218958641U (en) | 2022-12-27 | 2022-12-27 | Mounting piece, stator and electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218958641U true CN218958641U (en) | 2023-05-02 |
Family
ID=86106039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223508567.9U Active CN218958641U (en) | 2022-12-27 | 2022-12-27 | Mounting piece, stator and electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218958641U (en) |
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2022
- 2022-12-27 CN CN202223508567.9U patent/CN218958641U/en active Active
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| GR01 | Patent grant |