CN214314773U - Motor rotor assembly - Google Patents
Motor rotor assembly Download PDFInfo
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- CN214314773U CN214314773U CN202120582824.XU CN202120582824U CN214314773U CN 214314773 U CN214314773 U CN 214314773U CN 202120582824 U CN202120582824 U CN 202120582824U CN 214314773 U CN214314773 U CN 214314773U
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- rotor
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- rotor core
- commutator
- mandrel
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Abstract
The utility model discloses a motor rotor assembly, which comprises a mandrel, a rotor core, a commutator and an enameled wire; the core shaft is fixedly provided with a rotor core and a commutator along the axial direction; the rotor core is formed by superposing a plurality of rotor punching sheets, a mandrel connecting hole is formed in the center of each rotor punching sheet, the mandrel connecting hole is a quincuncial hole, and pear-shaped straight grooves are formed in the periphery of each rotor punching sheet; and the enameled wire is wound on the pear-shaped straight groove of the rotor core and the hook of the commutator. The motor rotor assembly has the advantages of high efficiency, compact structure, convenience in installation and low cost.
Description
Technical Field
The utility model relates to an electric motor rotor technical field especially relates to an electric motor rotor subassembly.
Background
Principle of permanent magnet brush dc motor: the stator assembly of the permanent magnet DC brush motor is provided with a pair of DC excited static main magnetic poles N and S, and the rotating part (rotor assembly) is provided with an armature core. A certain air gap exists between the stator assembly and the rotor assembly. The armature core is wound with an armature coil, and the head end and the tail end of the coil are respectively connected to the two circular arc commutator segments. The commutator segments are insulated from each other, and the whole commutator formed by the commutator segments is called a commutator. The commutator is fixed on the mandrel, and the commutator segment and the mandrel are also mutually insulated. When the armature rotates, the armature coil is connected to an external circuit through the commutator segments and the brushes. The electric energy of the direct current power supply enters the armature winding through the electric brush and the commutator to generate armature current, and a magnetic field generated by the armature current and the main magnetic pole form a main magnetic field to interact to generate electromagnetic torque so that the motor rotates to drive a load.
The motor rotor core of the existing foreign motor brand (Hira-HELLA) adopts a chute form, and can effectively weaken harmonic electromotive force generated by a tooth harmonic magnetic field, thereby weakening additional torque caused by the harmonic magnetic field and reducing the benefits of electromagnetic vibration and noise, but as the rotor core reduces the induced fundamental electromotive force of the rotor after opening the chute, the leakage reactance of the rotor is increased, the maximum torque and the power factor are reduced, and for a low-power motor, the noise reduction effect has no obvious advantages compared with the rotor straight-opening chute, and the manufacturing cost of the rotor is increased. Meanwhile, the groove filling rate of the rotor of the Hela-HELLA motor is lower and is less than 50%, and the efficiency of the motor is influenced.
Patent application No. 201910880389.6 is an electronic vacuum pump rotor assembly, because the distance between motor core and the collecting ring is too big, need set up regular polygon's bunch ring between rotor core and collecting ring, the increase of bunch ring increases rotor quality intangibly, influences motor efficiency, and the joining of bunch ring is really unnecessary.
Disclosure of Invention
To the not enough of above-mentioned prior art, the technical problem that this patent application will solve provides a compact structure, simple to operate, efficient, motor rotor subassembly with low costs.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a motor rotor assembly comprises a mandrel, a rotor core, a commutator and an enameled wire; the core shaft is fixedly provided with a rotor core and a commutator along the axial direction; the rotor core is formed by superposing a plurality of rotor punching sheets, a mandrel connecting hole is formed in the center of each rotor punching sheet, the mandrel connecting hole is a quincuncial hole, and pear-shaped straight grooves are formed in the periphery of each rotor punching sheet; and the enameled wire is wound on the pear-shaped straight groove of the rotor core and the hook of the commutator.
The mandrel connecting holes are six or more than even plum blossom holes.
And the contact surfaces of the mandrel and the rotor core, the upper end surface and the lower end surface of the rotor core and the groove surface of the pear-shaped straight groove are respectively coated with 0.3-0.5mm of epoxy insulation powder layers.
Wherein, the material of the mandrel is 30Cr 13.
Wherein, rotor core and dabber interference fit.
Wherein, the commutator is in interference fit with the mandrel.
In conclusion, the motor rotor assembly has the advantages of high efficiency, compact structure, convenience in installation and low cost. Rotor core adopts the straight flute structure of pyriform, through R angle and the tooth width of increase rotor punching, reduces the notch width, is favorable to reducing the iron loss of iron core. The coil slot filling rate is improved as much as possible under the condition of convenient wire embedding, and the power factor of the motor is favorably improved. Adopt rotor core to adopt the plum blossom hole simultaneously, reduce the contact surface of dabber and rotor core, effectively prevent rotor core to impress the surperficial fish tail and the deformation of dabber in-process, improve rotor subassembly assembly qualification rate.
Drawings
Fig. 1 is a schematic structural diagram of a rotor assembly of an electric machine according to the present invention.
Fig. 2 is an isometric view of the rotor core of fig. 1.
Fig. 3 is a top view of the rotor plate of fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
As shown in fig. 1-3, a rotor assembly of an electric machine comprises a mandrel 1, a rotor core 2, a commutator 3 and an enameled wire 4; the core shaft is fixedly provided with a rotor core and a commutator along the axial direction; the rotor core is formed by superposing a plurality of rotor punching sheets 6, a mandrel connecting hole 7 is formed in the center of each rotor punching sheet, the mandrel connecting hole is a quincuncial hole, pear-shaped straight grooves 8 are formed in the periphery of each rotor punching sheet, and the width of a notch is reduced by increasing the R angle 9 and the tooth width of each rotor punching sheet, so that the iron loss of the core is reduced; the enameled wire is wound on the pear-shaped straight groove of the rotor core and a hook of the commutator, and the enameled wire is in a large-pitch winding form.
The mandrel connecting holes are six or more than even plum blossom holes.
And the contact surfaces of the mandrel and the rotor core, the upper end surface and the lower end surface of the rotor core and the groove surface of the pear-shaped straight groove are respectively coated with 0.3-0.5mm epoxy insulation powder layers 5.
Wherein, the material of the mandrel is 30Cr 13.
Wherein, rotor core and dabber interference fit.
Wherein, the commutator is in interference fit with the mandrel.
In conclusion, the motor rotor assembly has the advantages of high efficiency, compact structure, convenience in installation and low cost. The rotor core adopts a pear-shaped straight groove structure, the existing R angle is R0.2, and the R angle of the rotor punching sheet is R0.5 by increasing the R angle and the tooth width of the rotor punching sheet; reduce notch width, current slot width is 2.2mm, and the slot width of this application is 2.0mm, is favorable to reducing the iron loss of iron core. The coil slot filling rate is improved as much as possible under the condition of convenient wire embedding, and the power factor of the motor is favorably improved. Adopt rotor core to adopt the plum blossom hole simultaneously, reduce the contact surface of dabber and rotor core, effectively prevent rotor core to impress the surperficial fish tail and the deformation of dabber in-process, improve rotor subassembly assembly qualification rate.
The slot type of the rotor punching of this application is compared with the HELLA motor, and HELLA motor rotor notch is great, increases rotor core's iron loss, and the lamination tooth width is less, and the magnetic resistance increase is unfavorable for the magnetic line of force to pass through. The rotor core of this application adopts the straight flute structure of pyriform, through the R angle and the tooth width of increase rotor punching, reduces the notch width, is favorable to reducing the iron loss of iron core.
Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, to the extent that such modifications and variations of the present invention fall within the scope of the present claims and their equivalents, it is intended that the present invention encompass such modifications and variations as well.
Claims (6)
1. The motor rotor assembly is characterized by comprising a mandrel, a rotor core, a commutator and an enameled wire;
the core shaft is fixedly provided with a rotor core and a commutator along the axial direction;
the rotor core is formed by superposing a plurality of rotor punching sheets, a mandrel connecting hole is formed in the center of each rotor punching sheet, the mandrel connecting hole is a quincuncial hole, and pear-shaped straight grooves are formed in the periphery of each rotor punching sheet;
and the enameled wire is wound on the pear-shaped straight groove of the rotor core and the hook of the commutator.
2. The rotor assembly of an electric motor as claimed in claim 1, wherein the spindle coupling holes are an even number of quincunx holes of six or more.
3. The rotor assembly of an electric machine as claimed in claim 1, wherein the contact surfaces of the mandrel and the rotor core, the upper and lower end surfaces of the rotor core and the groove surface of the pear-shaped straight groove are coated with 0.3-0.5mm of epoxy insulating powder layer.
4. The rotor assembly of an electric motor as claimed in claim 1, wherein the core shaft is 30Cr 13.
5. The electric machine rotor assembly of claim 1, wherein the rotor core is an interference fit with the mandrel.
6. An electric machine rotor assembly as claimed in claim 1, in which the commutator is an interference fit with the spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120582824.XU CN214314773U (en) | 2021-03-19 | 2021-03-19 | Motor rotor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120582824.XU CN214314773U (en) | 2021-03-19 | 2021-03-19 | Motor rotor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214314773U true CN214314773U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120582824.XU Active CN214314773U (en) | 2021-03-19 | 2021-03-19 | Motor rotor assembly |
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| CN (1) | CN214314773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665641A (en) * | 2022-02-18 | 2022-06-24 | 深圳市颂辉科技开发有限公司 | Aluminum series structure of armature induction coil |
-
2021
- 2021-03-19 CN CN202120582824.XU patent/CN214314773U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114665641A (en) * | 2022-02-18 | 2022-06-24 | 深圳市颂辉科技开发有限公司 | Aluminum series structure of armature induction coil |
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