CN216530772U - Permanent magnet direct current motor rotor punching sheet - Google Patents
Permanent magnet direct current motor rotor punching sheet Download PDFInfo
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- CN216530772U CN216530772U CN202123138240.2U CN202123138240U CN216530772U CN 216530772 U CN216530772 U CN 216530772U CN 202123138240 U CN202123138240 U CN 202123138240U CN 216530772 U CN216530772 U CN 216530772U
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- rotor punching
- permanent magnet
- punching sheet
- direct current
- current motor
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Abstract
本实用新型公开了一种永磁直流电机转子冲片，所述转子冲片上沿外圆周向均匀开设有若干磁钢槽，相邻所述磁钢槽之间形成隔磁桥，所述转子冲片上沿内圆周向均匀开设有若干铆钉孔，所述磁钢槽两端具有凸槽部，所述凸槽部呈圆弧状，相邻所述磁钢槽的所述凸槽部之间的最短距离为2.36mm，所述隔磁桥外沿具有直线型切边，相邻所述切边之间通过外圆弧连接，所述外圆弧与所述转子冲片的内圆同心，所述外圆弧半径为25.5mm，所述凸槽部的圆弧半径为0.66mm，该永磁直流电机转子冲片，齿槽转矩低、电机效率高、噪音低、成本低。
The utility model discloses a rotor punching piece of a permanent magnet DC motor. A plurality of magnetic steel grooves are evenly opened on the rotor punching piece along the outer circumferential direction, and a magnetic isolation bridge is formed between the adjacent magnetic steel grooves. A number of rivet holes are evenly opened on the sheet along the inner circumferential direction, the two ends of the magnetic steel slot are provided with convex grooves, and the convex grooves are in the shape of an arc. The shortest distance is 2.36mm, the outer edge of the magnetic isolation bridge has a straight cut edge, and the adjacent cut edges are connected by an outer arc, and the outer arc is concentric with the inner circle of the rotor punching piece, so The radius of the outer arc is 25.5mm, and the radius of the arc of the convex groove portion is 0.66mm. The permanent magnet DC motor rotor has low cogging torque, high motor efficiency, low noise and low cost.
Description
Technical Field
The utility model relates to the field of motor manufacturing, in particular to a permanent magnet direct current motor rotor punching sheet.
Background
A permanent magnet dc motor is a dc motor in which a magnetic field is established by permanent magnets, and can be classified into a permanent magnet brushless dc motor and a permanent magnet brush dc motor according to the presence or absence of a brush. The permanent magnet direct current motor is widely applied to various portable electronic devices or appliances, such as recorders and various toys, also widely applied to industries such as automobiles, ships, aviation, machinery and the like, and also widely applied to some high-precision products, such as copiers, cameras, mobile phones, bank note counting machines and the like.
In order to improve the performance of the permanent magnet direct current motor as much as possible, motors of various types on the market are produced, the improvement directions and the side points are different, for example, the magnetic steel is improved, a standard magnetic steel bread type design or an embedded magnetic steel multipole design is adopted, but various problems can be caused, for example, the assembly difficulty is increased, the power consumption of the motor is large, the cost is obviously increased, and the like, so that the improvement of the rotor punching sheet is urgent.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: in order to overcome the defects of the prior art, the permanent magnet direct current motor rotor punching sheet is low in tooth space torque, high in motor efficiency, low in noise and low in cost.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a permanent magnet direct current motor rotor punching, evenly seted up a plurality of magnetic steel grooves along excircle circumference on the rotor punching for place the magnet steel, it is adjacent form between the magnetic steel groove and separate the magnetism bridge, evenly seted up a plurality of rivet holes along interior circle circumference on the rotor punching for assembly connection.
In order to match corresponding magnetic steel grooves and improve the performance of the motor, the two ends of each magnetic steel groove are provided with convex groove parts which are arc-shaped and adjacent to each other, and the shortest distance between the convex groove parts of the magnetic steel grooves is 2.36 mm.
In order to optimize the magnetic pole coefficient and reduce the vibration and the noise of the rotor, the outer edge of the magnetism isolating bridge is provided with linear type trimming edges, the trimming edges are adjacent to each other and connected through an outer circular arc, the outer circular arc is concentric with the inner circle of the rotor punching sheet, and the radius of the outer circular arc is 25.5 mm.
Preferably, the radius of the arc of the convex groove part is 0.66 mm.
In order to improve the magnetic energy utilization rate, the number of the magnetic steel grooves is preferably 6, the width of the magnetic steel grooves is 1.91mm, the longest length of the outer side of the magnetic steel grooves is 21.7mm, the shortest length of the inner side of the magnetic steel grooves is 20.3mm, and the shortest distance between every two opposite magnetic steel grooves is 39.81 mm.
In order to be convenient for assembling with other parts, a positioning groove is formed in the inner circle of the rotor punching sheet.
In order to facilitate the recognition of the direction during assembly, a marking groove is formed in the inner circle of the rotor punching sheet.
Preferably, the marking groove has a radius of 1 mm.
In order to reduce inertia, improve the heat dissipation effect and reduce cost, a plurality of lightening holes are uniformly formed in the rotor punching sheet, and the lightening holes and the rivet holes are arranged at intervals.
According to the shape of the whole rotor punching sheet and the shape of the magnetic steel groove, the lightening holes are preferably waist-shaped, and according to actual conditions, lightening holes with other shapes can be designed.
The utility model has the beneficial effects that: according to the permanent magnet direct current motor rotor punching sheet, the punching sheet with the irregular circle outer circle is designed, so that the magnetic pole coefficient is optimized, and the vibration and the noise of a rotor are reduced; the magnetic steel slot is subjected to adaptive optimization design, so that the motor performance is improved, the starting torque is greatly improved under the condition of ensuring the power, and meanwhile, the temperature rise can be reduced; through design lightening hole in suitable position, promoted heat dispersion when having reduced iron loss.
Drawings
FIG. 1 is a schematic structural diagram of a permanent magnet DC motor rotor punching sheet according to the present invention;
FIG. 2 is an enlarged view of a portion at i of FIG. 1;
in the figure: 1. a magnetic steel groove; 11. a convex groove portion; 2. a magnetic isolation bridge; 3. rivet holes; 4. trimming; 5. an outer circular arc; 6. an inner circle; 61. positioning a groove; 62. marking a groove; 7. and (7) lightening holes.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the utility model. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
As shown in fig. 1-2, in a permanent magnet direct current motor rotor punching sheet, 6 magnetic steel grooves 1 are uniformly formed in the rotor punching sheet along the circumferential direction of an outer circle, and a magnetic isolation bridge 2 is formed between every two adjacent magnetic steel grooves 1.
The rotor punching sheet magnetic steel groove is mainly used for placing corresponding magnetic steel, the size design of the magnetic steel groove can directly influence the performance of the motor, therefore, the size design of the magnetic steel groove 1 becomes the key point of the permanent magnet direct current motor rotor punching sheet, and through repeated demonstration of continuous trial, finite element analysis and practice, the optimal scheme is as follows: the width a of the magnetic steel grooves 1 is 1.91mm, the longest length b of the outer side is 21.7mm, the shortest length c of the inner side is 20.3mm, and the shortest distance d between the two magnetic steel grooves 1 is 39.81 mm. Convex groove parts 11 are arranged at two ends of the magnetic steel groove 1, the convex groove parts 11 are arc-shaped with the radius of 0.66mm, and the shortest distance e between the convex groove parts 11 of the adjacent magnetic steel groove 1 is 2.36 mm.
Simultaneously, the appearance of rotor punching will influence the magnetic pole coefficient to influence the vibration and the noise of rotor, through constantly trying, finite element analysis and the repeated demonstration of practice, the best scheme is: the outer edge of the magnetism isolating bridge 2 is provided with a linear type trimming edge 4, the trimming edge 4 is adjacent to the trimming edge, the trimming edge is connected with the trimming edge 4 through an outer arc 5, the outer arc 5 is concentric with an inner circle 6 of the rotor punching sheet, and the radius of the outer arc 5 is 25.5 mm.
In addition, for the convenience of assembly, a plurality of rivet holes 3 are uniformly formed in the rotor punching sheet along the circumferential direction of the inner circle, and a positioning groove 61 is formed in the inner circle 6 of the rotor punching sheet.
A mark groove 62 is formed in the inner circle 6 of the rotor punching sheet, and the radius of the mark groove 62 is 1 mm.
A plurality of waist-shaped lightening holes 7 are uniformly formed in the rotor punching sheet, and the lightening holes 7 and the rivet holes 3 are arranged at intervals, so that inertia can be reduced, the heat dissipation effect can be improved, and iron loss can be reduced.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a permanent magnet direct current motor rotor punching, evenly seted up a plurality of magnet steel grooves along excircle circumference on the rotor punching, adjacent form magnetism bridge between the magnet steel groove, evenly seted up a plurality of rivet holes, its characterized in that along interior circle circumference on the rotor punching: the magnetic steel groove both ends have the tongue portion, the tongue portion is circular-arc, and is adjacent the magnetic steel groove the shortest distance between the tongue portion is 2.36mm, it has the linear type side cut to separate the outer edge of magnetic bridge, and is adjacent connect through outer circular arc between the side cut, outer circular arc with the interior circle of rotor punching is concentric, outer circular arc radius is 25.5 mm.
2. The permanent magnet direct current motor rotor punching sheet according to claim 1, characterized in that: the arc radius of the convex groove part is 0.66 mm.
3. The permanent magnet direct current motor rotor punching sheet according to claim 1, characterized in that: the quantity of magnetic steel groove is 6, and the width is 1.91mm, and the outside longest length is 21.7mm, and the inboard shortest length is 20.3mm, two relatively the shortest distance between the magnetic steel groove is 39.81 mm.
4. The permanent magnet direct current motor rotor punching sheet according to claim 1, characterized in that: and a positioning groove is formed in the inner circle of the rotor punching sheet.
5. The permanent magnet direct current motor rotor punching sheet according to claim 1, characterized in that: and a marking groove is formed in the inner circle of the rotor punching sheet.
6. The permanent magnet direct current motor rotor punching sheet according to claim 5, characterized in that: the radius of the marking groove is 1 mm.
7. The permanent magnet direct current motor rotor punching sheet according to claim 1, characterized in that: a plurality of lightening holes are uniformly formed in the rotor punching sheet, and the lightening holes and the rivet holes are arranged at intervals.
8. The permanent magnet direct current motor rotor punching sheet according to claim 7, characterized in that: the lightening holes are waist-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123138240.2U CN216530772U (en) | 2021-12-14 | 2021-12-14 | Permanent magnet direct current motor rotor punching sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123138240.2U CN216530772U (en) | 2021-12-14 | 2021-12-14 | Permanent magnet direct current motor rotor punching sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216530772U true CN216530772U (en) | 2022-05-13 |
Family
ID=81498261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123138240.2U Active CN216530772U (en) | 2021-12-14 | 2021-12-14 | Permanent magnet direct current motor rotor punching sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216530772U (en) |
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2021
- 2021-12-14 CN CN202123138240.2U patent/CN216530772U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 213000 Yinzhuang bridge section, Changxi Road, Yaoguan Town, Wujin District, Changzhou City, Jiangsu Province Patentee after: Changzhou Changhua Motor Co.,Ltd. Country or region after: China Address before: 213000 Yinzhuang bridge section, Changxi Road, Yaoguan Town, Wujin District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU CHANGHUA ELECTRICAL MOTOR Co.,Ltd. Country or region before: China |