CN218415933U - Stator core punching sheet, motor stator and motor - Google Patents

Abstract

The utility model provides a stator core is towards piece, motor stator and motor, stator core towards the piece including: the stator punching sheet unit comprises a plurality of stator teeth side by side, the stator teeth comprise pole shoes and free ends, the free ends between every two adjacent stator teeth are arranged at intervals, the pole shoes of the plurality of stator teeth are located on the inner side in the radial direction after the straight bar type stator punching sheet unit is bent, and the free ends are located on the outer side in the radial direction to form an outer tooth structure; the windings are then wound around the stator teeth via the free ends of the stator teeth, and the stator yoke is then simultaneously connected to the free ends of the plurality of stator teeth. According to the utility model discloses make the winding be structural winding towards radially outside external tooth, greatly increased the volume in winding groove for the rule problem of inner rotor multislot motor obtains effectual solution, reduces the degree of difficulty of winding.

Description

Stator core punching sheet, motor stator and motor

Technical Field

The utility model relates to the technical field of electric machines, concretely relates to stator core is towards piece, motor stator and motor.

Background

Large industrial fans are used in large workshops, logistics warehouses and other areas, and have the characteristics of 7.3m and 6.8m in diameter, such as large wind quantity, large wind quantity and soft wind speed approximate to natural wind, so that the wind speed of the fans is generally lower than 45-65 rpm. The traditional industrial large ceiling fan is in a mode that an alternating current asynchronous motor is matched with a speed reducer, and with the improvement of the technologies of a permanent magnet synchronous motor and a frequency converter, the direct-drive permanent magnet synchronous motor is popularized in recent years.

The permanent magnet synchronous motor has low requirement on the rotating speed, so that the number of poles of the motor is required to be increased, the number of slots is increased, a stator core 72 with 66 poles and a stator 54 with 60 poles are matched in the industry, the stator core is of a full-circle structure (as shown in figure 1), and a stator yoke part (1) and a stator tooth part (2) form a winding slot (3). In order to improve the efficiency of the motor, a half-slot (4) is generally adopted by the motor. The winding will follow half mouth groove (4) embedding on the inner circular wall of stator core to the inslot, because of the notch is less, the full rate of winding groove is more than 60%, leads to the rule very difficult, in order to reduce some difficulties can generally increase winding end height (5), leads to the quantity of having wasted the enameled wire and calorific capacity increases.

The stator core is formed by laminating stator punching sheets, materials in a winding groove (3) are waste materials in the process of punching the iron core by the punching sheets, the number of the multiple grooves of the pole number of the motor is large, more waste materials are generated, the waste materials punched by the plates are large, and the utilization rate is lower than 40%.

Because the multislot stator of the inner rotor motor among the prior art exists because the notch in half mouthful of groove is less and lead to the rule difficulty, technical problem such as the full rate of winding groove is low, consequently the utility model discloses research and design a stator core towards piece, motor stator and motor.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the multislot stator of inner rotor motor among the prior art and having because the notch in half mouthful of groove is less and lead to the rule difficulty, defect that winding groove fullness rate is low to a stator core is towards piece, motor stator and motor are provided.

In order to solve the above problem, the utility model provides a stator core is towards piece, it includes:

the stator punching sheet unit comprises a plurality of stator teeth side by side, each stator tooth comprises a pole shoe and a free end, two adjacent stator teeth are connected or not connected through the pole shoe, the free ends between the two adjacent stator teeth are arranged at intervals, the pole shoes of the plurality of stator teeth are positioned on the inner side in the radial direction after the straight bar type stator punching sheet unit is bent, and the free ends of the plurality of stator teeth are positioned on the outer side in the radial direction to form an outer tooth structure; at this time, a winding is wound around the stator teeth through free ends of the stator teeth, and then the stator yoke is simultaneously connected to the free ends of a plurality of the stator teeth.

In some embodiments, a plurality of straight bar type stator punching units are simultaneously arranged in a layout manufacturing process of the straight bar type stator punching units, the structures of the plurality of straight bar type stator punching units are the same, in the same row of samples, two straight bar type stator punching units are arranged in a staggered manner, each straight bar type stator punching unit comprises a No. 1 stator tooth punching sheet and a No. 2 stator tooth punching sheet, namely, a stator tooth of the No. 1 stator tooth punching sheet is inserted into a winding slot between two adjacent stator teeth of the No. 2 stator tooth punching sheet, and a stator tooth of the No. 2 stator tooth punching sheet is inserted into a winding slot between two adjacent teeth of the No. 1 stator tooth punching sheet.

In some embodiments, when adjacent two stator teeth are connected to each other through the pole shoes, the pole shoes between the adjacent two stator teeth are connected through a strip-shaped structure, and the strip-shaped structure is removed or retained after the annular tooth part and the stator yoke part are connected into a whole; when two adjacent stator teeth are not connected, the pole shoes between the two adjacent stator teeth are arranged at intervals.

In some embodiments, a winding slot is formed between two adjacent stator teeth, the winding is embedded into the winding slot, and the cross-sectional shape of the strip-shaped structure is a V-shaped structure; and one side of the strip-shaped structure, which faces the winding slot and/or one side of the strip-shaped structure, which faces away from the winding slot, is/are provided with a stress relief slot.

In some embodiments, the bar-shaped structure is a reusable general tool, and can be connected and arranged between two adjacent unconnected pole shoes before the straight bar-shaped stator punching unit is bent, and the bar-shaped structure can be detached after being bent and connected and molded with the stator yoke.

In some embodiments, the free ends of the stator teeth are further provided with a butt-inserting boss in a protruding manner, the radial inner peripheral wall of the stator yoke is provided with a butt-inserting groove in a recessed manner, and the butt-inserting boss can be inserted into the butt-inserting groove so that the stator yoke is fixed on the annular tooth part; or, the free ends of the stator teeth are also concavely provided with butt-inserting grooves, the radial inner peripheral wall of the stator yoke is convexly provided with butt-inserting bosses, and the butt-inserting bosses can be inserted into the butt-inserting grooves so that the stator yoke is fixed on the annular tooth part.

In some embodiments, the free end of each stator tooth is provided with the opposite insertion boss, the radially inner peripheral wall of the stator yoke part is provided with a plurality of opposite insertion grooves at intervals, and the opposite insertion grooves and the opposite insertion bosses are arranged in one-to-one correspondence; or, all be provided with on the free end of every stator tooth the opposite insertion groove, be provided with a plurality ofly on the radial inner perisporium of stator yoke portion at interval the opposite insertion boss, the opposite insertion groove with the opposite insertion boss one-to-one sets up.

In some embodiments, the stator yoke is segmented by lining up, and a plurality of segmented structures are spliced to form the annular stator yoke.

The utility model also provides a motor stator, it includes preceding arbitrary stator core towards the piece, still include the winding, it is a plurality of the straight bar stator is folded the piece unit and is carried out bending formation again after folding and fold a plurality of press annular tooth portion forms outer gear form iron core, the winding is through the winding inslot between two adjacent stator teeth of tooth bottom opening embedding between the free end of two adjacent stator teeth to the winding is folded after folding on the stator tooth, then with a plurality of stator yoke portion folds and folds back rethread bending or concatenation and form annular structure, and overlap the stator yoke portion that presses with the annular and cup joint stator tooth on the free end.

In some embodiments, when pole shoes between two adjacent stator teeth are connected through a strip-shaped structure, the straight strip-shaped stator punching sheet unit with the strip-shaped structure is a stator punching sheet connected by V-shaped grooves, and the stator punching sheets connected by two adjacent V-shaped grooves are arranged at intervals; the straight strip type stator punching sheet unit without the strip structure is a disconnected stator punching sheet; and at least one unconnected stator punching sheet is laminated between the stator punching sheets connected with the two adjacent V-shaped grooves.

In some embodiments, the stator yoke is an arc-shaped structure, a plurality of stator yokes of the arc-shaped structure are firstly laminated into a section of arc-shaped stator yoke iron core, and then the section of arc-shaped stator yoke iron core is spliced to form a full-circle stator yoke iron core, namely an annular and laminated stator yoke; and the full-circle stator yoke iron core is sleeved on the free ends of the stator teeth of the laminated annular tooth part.

The utility model also provides a motor, it includes preceding arbitrary motor stator.

The utility model provides a pair of stator core is towards piece, motor stator and motor have following beneficial effect:

1. the utility model discloses a separately make the form between annular tooth portion and the stator yoke portion in the stator core punching, and annular tooth portion is crooked by straight bar stator punching unit, and be the form of bending outward, thereby form the external tooth structure, at this moment, through twining the stator tooth from the free end of external tooth structure, again be connected to the stator yoke portion on the free end after the winding is accomplished, thereby make the winding twine on the external tooth structure outward towards the radial, compare the mode that present inner rotor motor twines on the internal tooth to the radial inside side, the volume of winding groove has greatly been increased, the winding space of winding has been increased, make the rule problem of inner rotor multislot motor obtain effectual solution, reduce the degree of difficulty of winding, and because the volume and the space of winding groove are bigger, can make more spaces carry out the plastic arrangement to the winding, can also make the end height (axial height) of winding effectively shorten, can reduce the generating heat of motor by a wide margin; the volume space of the winding slots is effectively increased due to the external tooth structure, and the slot filling rate of the winding of the stator can be improved, so that the power density of the motor is effectively improved, and the output power of the motor is improved;

2. the utility model can be arranged in a tooth socket way when the silicon steel sheets are punched and arranged through the straight bar chain type tooth part iron cores, thereby greatly improving the utilization rate of the silicon steel sheets; the utility model discloses a stator yoke portion iron core split is multistage stator yoke portion iron core, and whole stator yoke portion iron core is spliced into to multistage stator yoke portion iron core, and the multistage iron core is arranged in the punching press and is adopted the permutation to arrange, improves the utilization ratio of panel.

Drawings

Fig. 1 is a structural view of a conventional stator core of a full circle shape;

fig. 2 is a structural diagram of the straight bar type stator punching sheet unit of the present invention;

fig. 3a is a three-dimensional structure diagram of the straight bar type stator punching unit of the present invention, which is bent to form an annular tooth portion (external gear-shaped iron core);

fig. 3b is a top view structural diagram of the straight bar type stator punching unit of the present invention, which is bent to form an annular tooth portion (external gear-shaped iron core);

fig. 4 is a drawing of a punching layout structure of the straight bar type stator punching sheet unit of the present invention;

figure 5a is a block diagram of a stator yoke of the present invention;

figure 5b is a structural view of a plurality of laminated stator yoke sections of the present invention;

fig. 6 is a three-dimensional structure view of the motor stator of the present invention;

FIG. 7 is a partial enlarged view of portion A of FIG. 3 a;

fig. 8 is a partially enlarged view of a portion B of fig. 2.

The reference numerals are represented as:

100. an annular tooth portion; 1. a stator yoke; 2. stator teeth; 21. a free end; 3. a winding slot; 4. a pole shoe; 5. a winding; 6. a strip structure; 7. a stress relief groove; 8. the stator punching sheet is connected with the V-shaped groove; 9. Unconnected stator laminations; 10. inserting the bosses; 11. aligning the slots; 12. no. 1 stator tooth punching sheet; 13. No. 2 stator tooth punching sheet; 14. the bottom of the tooth is open.

Detailed Description

As shown in fig. 2-8, the utility model provides a stator core punching sheet, it includes:

the stator punching sheet unit comprises an annular tooth part 100 and a stator yoke part 1, wherein the annular tooth part 100 and the stator yoke part 1 are manufactured separately, the annular tooth part 100 is formed by bending a straight bar type stator punching sheet unit into an annular structure, the straight bar type stator punching sheet unit comprises a plurality of stator teeth 2 side by side, each stator tooth 2 comprises a pole shoe 4 and a free end 21, two adjacent stator teeth are connected or not connected with each other through the pole shoe 4, the free ends 21 between two adjacent stator teeth are arranged at intervals, the pole shoes 4 of the plurality of stator teeth are located on the radial inner side after the straight bar type stator punching sheet unit is bent, and the free ends 21 of the plurality of stator teeth are located on the radial outer side to form an outer tooth structure; at this time, the winding 5 is wound on the stator teeth through the free ends 21 of the stator teeth, and then the stator yoke 1 is simultaneously connected to the free ends 21 of a plurality of the stator teeth 2.

The utility model discloses a separately make the form between annular tooth portion and the stator yoke portion in the stator core punching, and annular tooth portion is crooked by straight bar stator punching unit, and be the form of bending outward, thereby form the external tooth structure, at this moment, through twine the winding from the free end of external tooth structure to the stator tooth, connect stator yoke portion to the free end again after the winding is accomplished, thereby make the winding twine on the external tooth structure outward facing radially, compare the mode that present inner rotor motor twines on the internal tooth to the radial inside side, greatly increased the volume of winding groove, the space that the winding twines has been increased, make the rule problem of inner rotor multiple-slot motor obtain effectual solution, reduce the degree of difficulty of winding, and because the volume and the space of winding groove are bigger, can make more spaces carry out plastic arrangement to the winding, also can make the end height (axial height) of winding effectively shorten, can reduce the generating heat of motor by a wide margin; and because the volume space of the winding slot is effectively increased by the external tooth structure, the slot filling rate of the winding of the stator can be improved, the power density of the motor is effectively improved, and the output power of the motor is improved.

The utility model relates to a PMSM's stator core separates into two parts through stator core yoke portion and tooth portion, and wherein stator tooth portion iron core adopts straight chain structure (like fig. 2), and through the frock with the outer gear form iron core of straight iron core bending one-tenth (like fig. 3a-3 b), the winding groove 3 that has constituted the stator of full open-ended, the winding rule or wire winding are very easy, also can reduce the motor and generate heat by the short end height of retractable winding.

The stator core is formed by laminating the stator punching sheets, wherein the straight strip chain type tooth part iron core can be arranged in a tooth slot opposite insertion mode when the silicon steel sheets are arranged in a punching mode (as shown in figure 4), and the utilization rate of the silicon steel sheets is greatly improved.

The stator yoke iron core is punched into a segmented arc shape (as shown in figures 5a-5 b), and then is spliced into a ring shape, and the stator tooth iron core is assembled with a winding and then is directly installed into a full-circle ring-shaped yoke iron core to form the winding stator (as shown in figure 6). The stator yoke iron core is formed by laminating the stator yoke punching sheets, and when the punching sheets are arranged, the row parts can be arranged in an array manner, so that the utilization rate of silicon steel sheets is improved.

The utility model solves the following technical problems

1. The problem of the difficult rule of multislot motor stator is solved, the winding shortens the end height simultaneously, reduces the motor and generates heat.

2. The slot filling rate of the winding of the stator is improved, and the power density of the motor is improved.

3. The silicon steel utilization rate of the stator punching sheet is improved, and the generation of waste materials is reduced.

In some embodiments, a plurality of straight bar type stator punching units are simultaneously arranged in a layout manufacturing process of the straight bar type stator punching units, the structures of the plurality of straight bar type stator punching units are the same, and in the same row of layout, two straight bar type stator punching units are arranged in a butting and inserting combination, each straight bar type stator punching unit comprises a No. 1 stator tooth punching sheet 12 and a No. 2 stator tooth punching sheet 13, namely, a stator tooth of the No. 1 stator tooth punching sheet 12 is inserted into a winding slot 3 between two adjacent stator teeth of the No. 2 stator tooth punching sheet 13, and a stator tooth 2 of the No. 2 stator tooth punching sheet 13 is inserted into a winding slot 3 between two adjacent teeth of the No. 1 stator tooth punching sheet 12. The utility model discloses still can arrange by the tooth's socket to inserting through straight bar chain tooth portion iron core when silicon steel sheet punching is arranged, increase substantially the utilization ratio of silicon steel sheet to improve material utilization ratio.

In some embodiments, when two adjacent stator teeth are connected to each other through the pole shoes 4, the pole shoes 4 between two adjacent stator teeth are connected through a bar-shaped structure 6, and the bar-shaped structure 6 is removed or retained after the annular tooth portion 100 is connected with the stator yoke portion 1; when two adjacent stator teeth are not connected, the pole shoes 4 between the two adjacent stator teeth are arranged at intervals.

This is the utility model discloses a further preferred structural style can be connected the pole shoe between two adjacent stator teeth through the bar structure, can directly dash out this bar structure when the stock layout punching press, this bar structure can be convenient for guarantee that each stator tooth can normally be crooked and can bend into annular structure when straight bar stator punching sheet unit is bending process, this bar structure is located the position of pole shoe after annular tooth portion and stator yoke portion accomplish to be connected, this position should not carry out the magnetic circuit intercommunication in theory, therefore can dismantle the bar structure, if keep then the bar structure is not established to this position of other stromatolites; the pole shoe is arranged at intervals, so that the two stator teeth are not connected, the structure can be directly punched in a stamping mode during stock layout, a strip-shaped structure is not formed, the structure can save the step of dismantling the strip-shaped structure in the later period, and the condition that a magnetic circuit is communicated does not exist in the pole shoe.

In some embodiments, a winding slot 3 is formed between two adjacent stator teeth 2, the winding 5 is embedded into the winding slot 3, and the cross-sectional shape of the strip-shaped structure 6 is a V-shaped structure; the strip-like structure 6 is provided with stress relief slots 7 on the side facing the winding slots 3 and/or on the side facing away from the winding slots 3. This is the utility model discloses a strip-shaped structure's further preferred structural style can be convenient for buckle or break through V nature structure, can realize stress release's effect and effect in this department through the stress relief groove, is convenient for demolish strip-shaped structure in this department.

In some embodiments, the strip-shaped structure 6 is a reusable general tool, which can be connected and disposed between two adjacent unconnected pole shoes 4 before the straight strip-shaped stator punching unit is bent, and the strip-shaped structure 6 can be detached after the straight strip-shaped stator punching unit is bent and connected with the stator yoke portion 1 for forming. The utility model discloses can also make into used repeatedly's general frock with the bar structure, with the bar structure connection between two not connected pole shoes when straight bar stator is crooked towards the piece unit like this, can be convenient for should be crooked effectively towards the piece unit, can demolish this bar structure after crooked effectively, prevent the magnetic circuit drunkenness.

In some embodiments, the free end 21 of the stator tooth 2 is further provided with a counter insertion boss 10 in a protruding manner, the radial inner peripheral wall of the stator yoke 1 is provided with a counter insertion slot 11 in a recessed manner, and the counter insertion boss 10 can be inserted into the counter insertion slot 11 so as to fix the stator yoke 1 to the annular tooth part 100; or, the free end 21 of the stator tooth 2 is further provided with an insertion slot in a concave manner, and the radial inner peripheral wall of the stator yoke 1 is provided with an insertion boss in a convex manner, wherein the insertion boss can be inserted into the insertion slot so that the stator yoke 1 is fixed on the annular tooth part 100. The utility model discloses still can be effectively with the free end department of stator yoke portion joint ring tooth portion through to inserting the boss and to the cooperation structure of slot, be connected to ring tooth portion's radial periphery promptly to realized positioning assembly, can realize that the magnetic circuit carries out the effect that communicates in this yoke portion department.

In some embodiments, the insertion boss 10 is disposed on the free end 21 of each stator tooth 2, a plurality of insertion slots 11 are disposed at intervals on the radially inner peripheral wall of the stator yoke 1, and the insertion slots 11 are disposed in one-to-one correspondence with the insertion bosses 10; or, all be provided with on the free end of every stator tooth 2 the butt joint slot, be provided with on the radial inside perisporium of stator yoke portion 1 at interval a plurality of the butt joint boss, the butt joint slot with the butt joint boss one-to-one sets up. This is the utility model discloses a further preferred structural style through a plurality of to inserting the boss and a plurality of to the setting of slot one-to-one, can be with every tooth homoenergetic of external tooth structure to stator yoke portion on, improved the steadiness between stator yoke portion and the annular tooth portion.

In some embodiments, the stator yoke 1 is fabricated by arranging a plurality of segmented structures in a row, and the segmented structures are spliced to form the ring-shaped stator yoke. The utility model discloses a stator yoke portion iron core split is multistage stator yoke portion iron core, and whole stator yoke portion iron core is spliced into to multistage stator yoke portion iron core, and the multistage iron core is arranged in the punching press and is adopted the permutation to arrange, can effectively improve the utilization ratio of panel.

The utility model provides a multipolar multislot PMSM of low rotational speed contains winding stator and permanent magnet rotor, and the stator core split of its winding stator is two parts iron core, and the iron core of these two parts all is folded towards the piece by the silicon steel sheet and is pressed and form.

The first part of iron cores are formed by laminating a plurality of stator tooth punching sheets on a stator tooth part iron core, a plurality of stator teeth 2 are regularly arranged on the stator tooth punching sheets to form a plurality of winding slots 3, and chain type straight stator tooth punching sheets (stator punching sheets 8 connected by V-shaped slots) are formed at stator tooth shoe (pole shoe 4) positions by adopting V-shaped strips (strip structures 6); the stator tooth part boots are not connected and continuously opened to form stator tooth part punching sheets (unconnected stator punching sheets 9), and the stator punching sheets 8 connected with the V-shaped grooves and the unconnected stator punching sheets 9 are matched with punching sheets according to a rule to be laminated into a chain type straight bar stator tooth part iron core (as shown in figure 7). The tooth heel part (namely the free end 21) of the stator tooth part iron core is provided with an opposite insertion boss 10 (opposite insertion slot 11) connected with the stator yoke part iron core.

The second part iron core is a circular ring formed by connecting a stator yoke iron core and a plurality of arc iron cores (as shown in fig. 6), and the inner circular wall of the stator yoke iron core is provided with an opposite insertion slot 11 (opposite insertion boss) matched with the opposite insertion boss 10 of the tooth heel part (namely, the free end 21) of the stator tooth part iron core.

When the punching sheets of the straight stator tooth part iron core are punched and arranged, the teeth or the slots of the No. 1 stator tooth part punching sheet 12 are inserted into the slots or the teeth of the No. 2 iron core 13 and are mutually inserted, and the two punching sheets form a group (as shown in figure 4); the punched sheets of the stator yoke iron core can be arranged in an array when being punched and arranged, and the generation of silicon steel sheet waste can be greatly reduced.

And then splicing the segmented iron cores of the stator yoke part (as shown in figures 5a-5 b) into a circular ring shape, and splicing the inserted bosses 10 on the inner circular wall of the iron core of the stator yoke part with the inserted slots 11 of the iron core of the stator tooth part provided with the winding to assemble a complete wound stator.

When necessary, a tool is adopted to cut off the V-shaped strips formed by the stator tooth part iron core, so that the motor efficiency can be improved.

If the V-shaped strip of the stator tooth punching sheet is independently made into a reusable tool from the iron core, the effect of forming the stator tooth iron core into a chain or bending to form an external gear-shaped iron core can be achieved.

The utility model provides a motor stator, it includes preceding arbitrary stator core lamination, still include winding 5, a plurality of the straight bar stator is folded the lamination back and is carried out bending again and form a plurality of fold and press annular tooth portion 100 forms outer gear form iron core, winding 5 is through in tooth bottom opening 14 embedding winding groove 3 between two adjacent stator teeth between the free end 21 of two adjacent stator teeth to the winding is folded after folding and is pressed on stator tooth 2, then will be a plurality of stator yoke portion 1 back rethread bending or concatenation are folded and are formed annular structure, and cup joint the stator yoke portion that annular was folded and is pressed stator tooth 2 on the free end 21.

The utility model discloses what form is that the external tooth structure makes the winding wind on the external tooth structure, compared with the mode that current inner rotor motor carries out the winding on the internal tooth towards radial inside side, greatly increased the volume of winding groove, increased the winding space, make the rule problem of inner rotor multislot motor obtain effectual solution, reduce the degree of difficulty of winding, and because the volume and the space of winding groove are bigger, can make more spaces carry out the plastic range to the winding, can also make the end height (axial height) of winding effectively shorten, can reduce the generating heat of motor by a wide margin; and because the external tooth structure enables the volume space of the winding slot to be effectively increased, the slot filling rate of the winding of the stator can be improved, the power density of the motor is effectively improved, and the output power of the motor is improved

In some embodiments, when the pole shoes 4 between two adjacent stator teeth are connected through the strip-shaped structure 6, the straight strip-shaped stator punching sheet unit with the strip-shaped structure 6 is a stator punching sheet 8 connected with a V-shaped groove, and the stator punching sheets 8 connected with two adjacent V-shaped grooves are arranged at intervals; the straight strip type stator punching unit without the strip structure 6 is a stator punching 9 which is not connected; and at least one unconnected stator punching sheet 9 is laminated between the stator punching sheets 8 connected with the two adjacent V-shaped grooves. The utility model discloses a crisscross setting between the straight bar stator towards the piece unit with do not have the bar structure of straight bar stator towards the piece unit with having, adjacent have the straight bar stator towards the piece unit of bar structure between set up the straight bar towards the piece unit that does not have the bar structure, such structure can maintain the effect that stator pole shoe department magnetic circuit does not scurry through towards the piece unit through the straight bar that the portion has the bar structure, consequently, two adjacent have the straight bar stator towards the piece unit of bar structure between set up more straight bar towards the piece unit that does not have the bar structure as far as possible, can effectively guarantee the magnetic circuit normal operating of stator in pole shoe department, the bar structure is just for the convenient crooked integrated into one piece, it is not too favorable to normal work, consequently, motor stator after accomplishing the preparation demolishs it best.

In some embodiments, the stator yoke portion 1 is an arc-shaped structure, a plurality of stator yoke portions 1 with arc-shaped structures are firstly laminated to form a section of arc-shaped stator yoke portion iron core, and then the sections of arc-shaped stator yoke portion iron cores are spliced to form a full-circle stator yoke portion iron core, namely, an annular and laminated stator yoke portion; the full-circle stator yoke iron core is sleeved on the free ends 21 of the stator teeth 2 of the laminated annular tooth part. The utility model discloses a stator yoke portion iron core split is multistage stator yoke portion iron core, and the multistage iron core is arranged in the punching press and is adopted the permutation to arrange, and whole stator yoke portion iron core is spliced into to multistage stator yoke portion iron core, can effectively improve the utilization ratio of panel.

The utility model also provides a motor, it includes preceding arbitrary motor stator.

The utility model discloses a permanent magnet synchronous motor contains wire winding stator and rotor and constitutes, and wherein wire winding stator's stator core is folded by the stator punching and is pressed and form, and its characteristics lie in that the annular tooth portion 100 and the stator yoke portion 1 of iron core are separated and unpack apart, and the tooth boots (the pole shoe 4) of iron core tooth portion adopt V-arrangement strip (the bar structure 6) to link each other, arrange into vertical bar chain tooth portion iron core (as figure 2), and iron core tooth portion can be crooked external gear form iron core (as figure 3a-3 b) of formation of V-arrangement strip.

When the iron core punching sheets are arranged in a stamping mode, the stator teeth and the stator slots can be mutually oppositely arranged in an inserting mode, and the utilization rate of the plates is improved (as shown in figure 4).

The V-shaped strip of the stator iron core tooth shoe is a part of an iron core, is formed by laminating punching sheets and can be connected according to regular distance pieces (as shown in figure 7).

Stress relief grooves 7 (shown in figure 8) are arranged on the V-shaped strips of the stator core tooth shoes.

The V-shaped strips of the stator iron core tooth shoes can be cut off after the tooth iron cores are embedded into the yoke iron core and fixed.

The V-shaped strips of the stator core shoes may be detachable components.

The straight strip chain type tooth iron core is bent into an external gear-shaped iron core and then is connected well by adopting a fastening measure.

The split of stator yoke portion iron core is multistage stator yoke portion iron core, and whole stator yoke portion iron core can be spliced into to multistage stator yoke portion iron core. The multi-section iron cores can be arranged in an array in a stamping mode, and the utilization rate of plates is improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (12)

1. The utility model provides a stator core towards piece which characterized in that: the method comprises the following steps:

the stator punching sheet comprises an annular tooth part (100) and a stator yoke part (1), wherein the annular tooth part (100) and the stator yoke part (1) are manufactured separately, the annular tooth part (100) is formed by bending a straight strip type stator punching sheet unit into an annular structure, the straight strip type stator punching sheet unit comprises a plurality of stator teeth (2) side by side, each stator tooth (2) comprises a pole shoe (4) and a free end (21), two adjacent stator teeth are connected or not connected with each other through the pole shoe (4), the free ends (21) between two adjacent stator teeth are arranged at intervals, the pole shoes (4) of the plurality of stator teeth are located on the radial inner side after the straight strip type stator punching sheet unit is bent, and the free ends (21) of the plurality of stator teeth are located on the radial outer side to form an outer tooth structure; at this time, a winding (5) is wound on the stator teeth through the free ends (21) of the stator teeth, and then the stator yoke (1) is simultaneously connected with the free ends (21) of a plurality of the stator teeth (2).

2. The stator core punching sheet of claim 1, characterized in that:

the structure of a plurality of straight bar type stator punching sheet units is the same, in the same row sample, two straight bar type stator punching sheet units are arranged by means of opposite insertion combination, the two straight bar type stator punching sheet units comprise No. 1 stator tooth punching sheets (12) and No. 2 stator tooth punching sheets (13), namely, the stator teeth of the No. 1 stator tooth punching sheets (12) are inserted into winding slots (3) between two adjacent stator teeth of the No. 2 stator tooth punching sheets (13), and the stator teeth (2) of the No. 2 stator punching sheets (13) are inserted into the winding slots (3) between two adjacent teeth of the No. 1 stator tooth punching sheets (12).

3. The stator core punching sheet of claim 1, characterized in that:

when two adjacent stator teeth are connected with each other through the pole shoes (4), the pole shoes (4) between the two adjacent stator teeth are connected through the strip-shaped structures (6), and the strip-shaped structures (6) are detached or reserved after the annular tooth part (100) is connected with the stator yoke part (1) into a whole; when two adjacent stator teeth are not connected, pole shoes (4) between the two adjacent stator teeth are arranged at intervals.

4. The stator core punching sheet of claim 3, characterized in that:

a winding slot (3) is formed between two adjacent stator teeth (2), the winding (5) is embedded into the winding slot (3), and the cross section of the strip-shaped structure (6) is in a V-shaped structure; the side of the strip-shaped structure (6) facing the winding slot (3) and/or the side facing away from the winding slot (3) is provided with a stress relief slot (7).

5. The stator core punching sheet of claim 3, wherein:

the strip-shaped structure (6) is a reusable universal tool, can be connected and arranged between two adjacent unconnected pole shoes (4) before the straight strip-shaped stator punching sheet unit is bent, and can be detached after the straight strip-shaped stator punching sheet unit is bent and is connected and formed with the stator yoke portion (1).

6. The stator core punching sheet of claim 1, characterized in that:

the free end (21) of the stator tooth (2) is also convexly provided with a butt-inserting boss (10), the radial inner peripheral wall of the stator yoke portion (1) is concavely provided with a butt-inserting groove (11), and the butt-inserting boss (10) can be inserted into the butt-inserting groove (11) so that the stator yoke portion (1) is fixed on the annular tooth portion (100); or, the free end (21) of the stator tooth (2) is also concavely provided with an opposite insertion groove, the radial inner peripheral wall of the stator yoke part (1) is convexly provided with an opposite insertion boss, and the opposite insertion boss can be inserted into the opposite insertion groove so that the stator yoke part (1) is fixed on the annular tooth part (100).

7. The stator core punching sheet of claim 6, wherein:

the free end (21) of each stator tooth (2) is provided with the opposite insertion boss (10), the radial inner peripheral wall of the stator yoke part (1) is provided with a plurality of opposite insertion grooves (11) at intervals, and the opposite insertion grooves (11) and the opposite insertion bosses (10) are arranged in a one-to-one correspondence manner; or, all be provided with on the free end of every stator tooth (2) the opposite insertion groove, be provided with a plurality ofly on the radial inner perisporium of stator yoke portion (1) at interval the opposite insertion boss, the opposite insertion groove with the opposite insertion boss one-to-one sets up.

8. The stator core punching sheet of claim 1, characterized in that:

the stator yoke portion (1) is made into a sectional type structure in an arraying and sample arranging mode, and the plurality of sectional type structures are spliced to form the annular stator yoke portion.

9. A stator for an electrical machine, comprising: the stator core punching sheet comprises the stator core punching sheet of any one of claims 1 to 8, and further comprises a winding (5), wherein a plurality of the straight bar type stator punching sheet units are laminated and then bent to form a plurality of laminated annular tooth parts (100) to form an external gear-shaped iron core, the winding (5) is embedded into a winding groove (3) between two adjacent stator teeth through a tooth bottom opening (14) between free ends (21) of the two adjacent stator teeth and is wound on the laminated stator teeth (2), then a plurality of the stator yoke parts (1) are laminated and then bent or spliced to form an annular structure, and the annular stator yoke parts are sleeved on the free ends (21) of the stator teeth (2).

10. The motor stator of claim 9, wherein:

when the pole shoes (4) between two adjacent stator teeth are connected through the strip-shaped structures (6), the straight strip-shaped stator punching sheet units with the strip-shaped structures (6) are stator punching sheets (8) connected by V-shaped grooves, and the stator punching sheets (8) connected by two adjacent V-shaped grooves are arranged at intervals; the straight strip type stator punching unit without the strip structure (6) is a disconnected stator punching (9); and at least one unconnected stator punching sheet (9) is superposed between the stator punching sheets (8) connected with the two adjacent V-shaped grooves.

11. The electric machine stator of claim 9, wherein:

the stator yoke part (1) is of an arc-shaped structure, the plurality of the stator yoke parts (1) of the arc-shaped structure are firstly laminated into a section of arc-shaped stator yoke part iron core, and then the plurality of sections of arc-shaped stator yoke part iron cores are spliced to form a whole-circle stator yoke part iron core, namely an annular and laminated stator yoke part; the full-circle stator yoke iron core is sleeved on the laminated rear annular tooth part of the free end (21) of the stator tooth (2).

12. An electric machine characterized by: comprising an electric machine stator according to any of claims 9-11.

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