阅读说明：本技术 一种三相分线单齿绝缘板 (Three-phase branching single-tooth insulating plate ) 是由 于新刚 于 2021-10-18 设计创作，主要内容包括：本发明公开的三相分线单齿绝缘板,分为若干组三相分线单齿绝缘板组件,其特征在于,每组三相分线单齿绝缘板组件均包括第一绝缘板和第二绝缘板两部分,每组三相分线单齿绝缘板组件中的第一绝缘板和第二绝缘板分别从定子铁芯轴线方向相对的第一侧和第二侧插在一定子齿部上,第一绝缘板和第二绝缘板相互配合包裹住所述定子齿部。本发明可以使得电梯曳引机用分布集中绕组采用自动绕线机进行绕线,大幅度提高劳动生产率。(The invention discloses a three-phase branching single-tooth insulating board which is divided into a plurality of groups of three-phase branching single-tooth insulating board components and is characterized in that each group of three-phase branching single-tooth insulating board components comprises a first insulating board and a second insulating board, the first insulating board and the second insulating board in each group of three-phase branching single-tooth insulating board components are respectively inserted into a stator tooth part from a first side and a second side which are opposite to each other in the axial direction of a stator iron core, and the first insulating board and the second insulating board are matched with each other to wrap the stator tooth part. The invention can lead the distributed concentrated winding for the elevator tractor to adopt the automatic winding machine for winding, thereby greatly improving the labor productivity.)

1. Three-phase separated time monodentate insulation board divide into a plurality of groups three-phase separated time monodentate insulation board components, its characterized in that, every group three-phase separated time monodentate insulation board component all includes first insulation board and second insulation board two parts, and first insulation board and second insulation board in every group three-phase separated time monodentate insulation board component insert on a stator tooth portion from the relative first side of stator core axis direction and second side respectively, and first insulation board and second insulation board are mutually supported the parcel and are lived stator tooth portion.

2. The three-phase branching single-tooth insulating plate of claim 1, wherein the first insulating plate comprises a first U-shaped insulating plate, a second U-shaped insulating plate and a third U-shaped insulating plate, wherein the second U-shaped insulating plate and the third U-shaped insulating plate are symmetrically arranged on two sides of a first bottom plate in the first U-shaped insulating plate in a direction parallel to the circumferential direction of the stator core, and the notch of the second U-shaped groove of the second U-shaped insulating plate is opposite to the notch of the third U-shaped groove of the third U-shaped insulating plate; the second insulating plate comprises a fourth U-shaped insulating plate, a fifth U-shaped insulating plate and a sixth U-shaped insulating plate, wherein the fifth U-shaped insulating plate and the sixth U-shaped insulating plate are symmetrically provided with two sides of a fourth bottom plate in the fourth U-shaped insulating plate, which are parallel to the circumferential direction of the stator core, and the notch of a fifth U-shaped groove of the fifth U-shaped insulating plate is opposite to the notch of a sixth U-shaped groove of the sixth U-shaped insulating plate in direction; the second U-shaped insulating plate in each first insulating plate, the third U-shaped insulating plate in the adjacent first insulating plate and the fifth U-shaped insulating plate in each second insulating plate corresponding to the first insulating plate and the sixth U-shaped insulating plate adjacent to the fifth insulating plate are matched with each other and buckled on a stator tooth part to wrap the stator tooth part; and a coil cavity is formed by the second bottom plate in the second U-shaped insulating plate of each first insulating plate, the third bottom plate in the third U-shaped insulating plate of the first insulating plate, the first bottom plate in the first U-shaped insulating plate of the first insulating plate, the fifth bottom plate in the fifth U-shaped insulating plate of each corresponding second insulating plate, the sixth bottom plate in the sixth U-shaped insulating plate of the second insulating plate and the fourth bottom plate in the fourth U-shaped insulating plate of the second insulating plate.

3. The three-phase branching single-tooth insulating plate of claim 2, wherein the second U-shaped insulating plate further comprises a second outer plate and a second inner plate, the second outer plate and the second inner plate are respectively arranged at the outer side and the inner side of the second bottom plate and surround a second U-shaped groove; the third U-shaped insulating plate also comprises a third outer side plate and a third inner side plate, wherein the third outer side plate and the third inner side plate are respectively arranged at the outer side and the inner side of the third bottom plate and enclose a third U-shaped groove; the fifth U-shaped insulating plate also comprises a fifth outer side plate and a fifth inner side plate, wherein the fifth outer side plate and the fifth inner side plate are respectively arranged at the outer side and the inner side of the fifth bottom plate and enclose a fifth U-shaped groove; the sixth U-shaped insulating plate also comprises a sixth outer side plate and a sixth inner side plate, wherein the sixth outer side plate and the sixth inner side plate are respectively arranged at the outer side and the inner side of the sixth bottom plate and enclose a sixth U-shaped groove; the second bottom plate, the second outer side plate, the second inner side plate of the second U-shaped insulating plate of each first insulating plate, the third bottom plate of the third U-shaped insulating plate adjacent to the first insulating plate, the third outer side plate, the third inner side plate and the fifth bottom plate, the fifth outer side plate, the fifth inner side plate of the fifth U-shaped insulating plate of each second insulating plate corresponding to the first insulating plate, the sixth bottom plate, the sixth outer side plate and the sixth inner side plate of the sixth U-shaped insulating plate of the second insulating plate adjacent to the second insulating plate are matched and buckled on a stator tooth part.

4. The three-phase branching single-tooth insulating plate of claim 3, wherein a second bottom end lap, a second outer side end lap and a second inner side end lap are respectively provided at ends of the second bottom plate, the second outer side plate and the second inner side plate remote from the first U-shaped insulating plate; a third bottom end lap edge, a third outer side end lap edge and a third inner side end lap edge are respectively arranged at the ends, far away from the first U-shaped insulating plate, of the third bottom plate, the third outer side plate and the third inner side plate; a fifth bottom end lap, a fifth outer side end lap and a fifth inner side end lap are respectively arranged at the ends, far away from the fourth U-shaped insulating plate, of the fifth bottom plate, the fifth outer side plate and the fifth inner side plate; a sixth bottom end lap edge, a sixth outer side end lap edge and a sixth inner side end lap edge are respectively arranged at the ends, far away from the fourth U-shaped insulating plate, of the sixth bottom plate, the sixth outer side plate and the sixth inner side plate; the second bottom end overlap, the second outer end overlap and the second inner end overlap are respectively in lap joint with the fifth bottom end overlap, the fifth outer end overlap and the fifth inner end overlap, and the third bottom end overlap, the third outer end overlap and the third inner end overlap are respectively in lap joint with the sixth bottom end overlap, the sixth outer end overlap and the sixth inner end overlap.

5. The three-phase branching single-tooth insulating plate according to claim 4, wherein the second bottom end edge, the second outer end edge, the second inner end edge, the third bottom end edge, the third outer end edge, and the third inner end edge are adhered to the stator teeth, the fifth bottom end edge, the fifth outer end edge, and the fifth inner end edge overlap the second bottom end edge, the second outer end edge, and the second inner end edge, respectively, and the sixth bottom end edge, the sixth outer end edge, and the sixth inner end edge overlap the third bottom end edge, the third outer end edge, and the third inner end edge, respectively.

6. The three-phase branching single-tooth insulating plate according to claim 5, wherein the lengths of the second bottom end lap, the second outer end lap, the second inner end lap, the fifth bottom end lap, the fifth outer end lap, the fifth inner end lap, the third bottom end lap, the third outer end lap, the third inner end lap, the sixth bottom end lap, the sixth outer end lap and the sixth inner end lap are all 2-6 mm; the thicknesses of the second bottom end overlap edge, the second outer end overlap edge, the second inner end overlap edge, the fifth bottom end overlap edge, the fifth outer end overlap edge, the fifth inner end overlap edge, the third bottom end overlap edge, the third outer end overlap edge, the third inner end overlap edge, the sixth bottom end overlap edge, the sixth outer end overlap edge and the sixth inner end overlap edge are respectively 0.4-0.5 times of the thicknesses of the second bottom plate, the second inner side plate, the second outer side plate, the fifth bottom plate, the fifth inner side plate, the fifth outer side plate, the third bottom plate, the third inner side plate, the third outer side plate, the sixth bottom plate, the sixth inner side plate and the sixth outer side plate.

7. The three-phase branching single tooth insulation plate of claim 6 wherein a second outside lap is provided on a side of said second outside plate adjacent to the notch of the second U-shaped groove and a third outside lap is provided on a side of said third outside plate adjacent to the notch of the third U-shaped groove; a fifth outer side lap is provided on the side of the fifth outer side plate adjacent to the notch of the fifth U-shaped groove; a sixth outer side lap is arranged on the side, close to the notch of the sixth U-shaped groove, of the sixth outer side plate; the second outside-side lap in the second U-shaped insulating plate of each first insulating plate overlaps with the third outside-side lap in the third U-shaped insulating plate of the adjacent one of the first insulating plates, and the fifth outside-side lap in the fifth U-shaped insulating plate of each second insulating plate overlaps with the sixth outside-side lap in the sixth U-shaped insulating plate of the adjacent one of the second insulating plates.

8. The three-phase branching single-tooth insulating plate according to claim 7, wherein the second outside edge, the third outside edge, the fifth outside edge, and the sixth inside and outside edge have a width of 2 to 6mm and a thickness of 0.4 to 0.5 times the thickness of the second outside plate, the third outside plate, the fifth outside plate, and the sixth outside plate, respectively.

9. The three-phase branching single-tooth insulating plate of claim 8, wherein the second and fifth outside tabs abut against the stator teeth, and the third and sixth outside tabs overlap the second and fifth outside tabs, respectively.

10. The three-phase branching single tooth insulating plate of claim 9, wherein the widths of the second outer plate, third outer plate, fifth outer plate and sixth outer plate are greater than the widths of the second inner plate, third inner plate, fifth inner plate and sixth inner plate, respectively; the width of the second inner side panel is equal to the width of the fifth inner side panel; the sum of the widths of the second inner side panel and the second inner side lap is equal to the sum of the widths of the fifth inner side panel and the fifth inner side lap; the width of the third inner side panel is equal to the width of the sixth inner side panel; the sum of the widths of the sixth outer panel and the sixth outer side lap is greater than the width of the third outer panel.

11. The three phase branching single tooth insulator plate of claim 10 wherein the distance between the line of contact between said sixth outside lap of each second insulator plate and said fifth outside plate of an adjacent one of the second insulator plates and the line of contact between said third outside lap of each first insulator plate and said second outside plate of an adjacent one of the first insulator plates is 1 to 2 mm.

12. The three phase branching single tooth insulation plate of claim 11 wherein the difference between the width of the second inner plate and the width of the second outer plate, the difference between the width of the third inner plate and the width of the third outer plate, the difference between the width of the fifth inner plate and the width of the fifth outer plate, and the difference between the width of the sixth inner plate and the width of the sixth outer plate are each 1-3 mm.

13. The three phase branching single tooth insulator plate of claim 12 wherein the first U-shaped insulator plate further comprises a first inner side plate and a first outer side plate, the first inner side plate and the first outer side plate being disposed inside and outside the first base plate and enclosing a first U-shaped channel; the width of the first inner side panel is equal to the distance between the edge of the second inner side panel and the edge of the third inner side panel; chamfers are arranged on two sides of the first inner side plate in the width direction; the distance between the edge of the first inner side plate in the length direction and the first side of the stator core in the axial direction is 1-5 mm; the distance between the two sides of the first inner side plate in the width direction and the cavity walls of the two sides of the coil cavity, namely the surface of the second bottom plate adjacent to the coil cavity and the surface of the third bottom plate adjacent to the coil cavity, is 1-3 mm; the inner surface of the first inner side panel protrudes beyond the inner surfaces of the second and third inner side panels; the width of the first outer side panel is equal to the distance between the edge of the second outer side flap and the edge of the third outer side flap.

14. The three-phase branching single-tooth insulating plate of claim 13, wherein the end of the first bottom plate adjacent to the first outer side plate protrudes from the outer surface of the first outer side plate in the direction of the outer diameter of the stator core, the width of the portion of the first bottom plate protruding from the outer surface of the first outer side plate is equal to the width of the first outer side plate, and a wire outlet notch and a wire inlet notch are symmetrically formed on the portion of the first bottom plate protruding from the outer surface of the first outer side plate; three layers of steps are symmetrically arranged on the first outer side plate along the width direction of the first outer side plate, the height of each layer of step is 4.5-7.5 mm added to the total thickness of one tooth winding, and the distance between each step and the outer shell is 2-3 times of the wire diameter to meet the minimum electrical insulation distance and creepage distance and the allowance of 2-5 mm; each step is provided with a partition board protruding towards the outer diameter direction of the stator core and six partition boards, the distance between the outer edges of the two partition boards on the first step, which is farthest away from the part of the outer surface of the first bottom board protruding out of the first outer side board, is equal to the distance between the inner edges of the two partition boards on the second step, and the distance between the outer edges of the two partition boards on the third step, which is closest to the part of the outer surface of the first bottom board protruding out of the first outer side board, is equal to the distance between the outer edges of the two vertical boards on the second step; the projections of the three partition plates positioned on one side of the first outer side plate in the width direction and parallel to the length direction of the first outer side plate are all in the wire inlet notch, the projections of the three partition plates positioned on the other side of the first outer side plate in the width direction and parallel to the length direction of the first outer side plate are all in the wire outlet notch, and the height of each partition plate is 3-6 mm; the outermost sides of the first outer side plates in the width direction are respectively provided with a protrusion for overline between the teeth of the first outer side plates, the distance between the protrusion for overline between each first outer side plate tooth and the overline of the three-phase belt is 2-3 times of the wire diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance; the projections for overline between the two first outer side plate teeth are divided into projections for overline between the first outer side plate left teeth and projections for overline between the first outer side plate right teeth and teeth, the outer edges of the projections for overline between the first outer side plate left teeth and teeth are flush with the outer edge of the second outer side plate, and the outer edges of the projections for overline between the first outer side plate right teeth and teeth are flush with the outer edge of the third outer side plate; the projection for overline between the first outer side plate left tooth and the tooth is provided with a projection overlap edge for overline between the first outer side plate left tooth and the tooth, the projection for overline between the first outer side plate right tooth and the tooth is provided with a projection overlap edge for overline between the first outer side plate right tooth and the tooth, the width of the projection overlap edge for overline between the first outer side plate left tooth and the width of the projection overlap edge for overline between the first outer side plate right tooth and the tooth are 2-6 mm, the thickness of the projection for overline between the first outer side plate left tooth and the thickness of the projection for overline between the first outer side plate right tooth and the tooth are 0.4-0.5 times respectively, the outer edge of the projection overlap edge for overline between the first outer side plate left tooth and the tooth is flush with the outer edge of the second outer side overlap edge, and the outer edge of the projection overlap edge for overline between the first outer side plate right tooth and the tooth is flush with the outer edge of the third outer side overlap edge; during assembly, the projection overlap edge for overline between the right tooth and the tooth of the first outer side plate on one first insulation plate is overlapped on the projection overlap edge for overline between the left tooth and the tooth of the first outer side plate on the adjacent first insulation plate.

15. The three-phase branching single tooth insulator plate of claim 14, wherein the fourth U-shaped insulator plate further comprises a fourth outer side plate and a fourth inner side plate, the fourth outer side plate and the fourth inner side plate being respectively disposed on the outer side and the inner side of the fourth base plate and enclosing a fourth U-shaped slot; a fourth bottom plate protrusion is provided on a side of the fourth bottom plate adjacent to the fourth outer side plate, the fourth bottom plate protrusion protruding from an outer surface of the fifth outer side plate and an outer surface of the sixth outer side plate in an outer diameter direction of the stator core; the fourth outer side plate is arranged in the middle of the fourth bottom plate protruding part, the width of the fourth outer side plate is approximately equal to the width of the coil cavity, and two sides of the fourth outer side plate in the width direction are respectively provided with a chamfer; a projection for crossing lines between the fourth outer plate teeth and the teeth is arranged on the outermost side of the projecting part of the fourth bottom plate in the width direction, the distance between the projection for crossing lines between each fourth outer plate tooth and the teeth and the crossing lines of the three-phase belt is 2-3 times of the line diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance; the projections for overline between the teeth of the two fourth outer side plates are divided into projections for overline between the left teeth of the fourth outer side plates and projections for overline between the right teeth of the fourth outer side plates, the outer edges of the projections for overline between the left teeth of the fourth outer side plates and the teeth are flush with the outer edge of the fifth outer side plate, and the outer edges of the projections for overline between the right teeth of the fourth outer side plates and the teeth are flush with the outer edge of the sixth outer side plate; the projection for overline between the fourth outer side plate left tooth and the tooth is provided with a projection overlap edge for overline between the fourth outer side plate left tooth and the tooth, the projection for overline between the fourth outer side plate right tooth and the tooth is provided with a projection overlap edge for overline between the fourth outer side plate right tooth and the tooth, the width of the projection overlap edge for overline between the fourth outer side plate left tooth and the width of the projection overlap edge for overline between the fourth outer side plate right tooth and the tooth are 2-6 mm, the thickness of the projection for overline between the fourth outer side plate left tooth and the thickness of the projection for overline between the first outer side plate right tooth and the tooth are 0.4-0.5 times, the outer edge of the projection overlap edge for overline between the fourth outer side plate left tooth and the tooth is flush with the outer edge of the fifth outer side overlap edge, and the outer edge of the projection overlap edge for overline between the fourth outer right tooth and the tooth are flush with the outer edge of the sixth outer side overlap edge; when the cable is assembled, the overline between the right teeth and the teeth of the fourth outer side plate on one first insulation plate is lapped on the overline between the left teeth and the teeth of the fourth outer side plate on the adjacent first insulation plate by using the protruding overlap edge; the width of the fourth inner side panel is equal to the distance between the edge of the fifth inner side panel and the edge of the sixth inner side panel; chamfers are arranged on two sides of the fourth inner side plate in the width direction; the distance between the edge of the fourth inner side plate in the length direction and the second side of the stator core in the axis direction is 1-5 mm.

Technical Field

The invention relates to the technical field of traction machines, in particular to a three-phase branching single-tooth insulating plate for an elevator traction machine, wherein concentrated windings are distributed on the three-phase branching single-tooth insulating plate.

Background

At present, the known permanent magnet synchronous gearless tractor stator winding adopted by the elevator has various winding modes, a plurality of distributed windings are adopted for improving the electromagnetic performance, and meanwhile, in order to further save end copper wires and reduce the material and labor cost, a few companies are also adopting the distributed concentrated winding technology for production. The technology of distributing concentrated windings on the traction machines on the market adopts a manual wire embedding mode, the grooves need to be wrapped by insulating paper in advance, then, copper wires wound by wire moulds are embedded, in order to ensure smooth wire embedding, the end parts need to be large enough, the groove openings are large, otherwise, the copper wires are easy to be damaged or the insulating paper is easy to be broken in the wire embedding process. In addition, a longer length is reserved for the cross line between two teeth of the copper wire, after the wire is well laid under the former tooth, the wire laying under the second tooth is influenced by the outgoing wire of the first tooth, the redundant cross line needs to be bound, the cross line between the phase belts of the same phase and the cross line between the phase belts of different phases are cut off, the redundant wire is cut off, and finally welding, insulating and binding treatment is carried out.

The distributed concentrated winding technology can reduce the distortion rate of the counter potential, so that the counter potential tends to be more sinusoidal, which is beneficial to reducing the vibration noise of the motor, but the following problems exist in manual wire embedding:

1) the production process is not efficient, and the labor cost is high;

2) in order to facilitate manual offline, the tooth space torque of the tractor is increased due to the large notch of the straight-slot stator, and the vibration noise performance of the tractor is influenced;

3) the copper line passes through the notch and gets into the inslot, arranges in a jumble, and the tooth portion can not be hugged closely to the copper line, and the inlet wire probably is taken together with the lead-out wire, and the voltage difference is big, and the bad risk grow of turn-to-turn insulation.

4) In order to facilitate embedding, the copper wire at the end part of the coil is long, copper is wasted, shaping after embedding consumes manpower, and the requirement on the space of the shell is high;

5) longer copper wires are reserved between the overlines of the phase belts of the same phase for welding and wrapping the insulating sleeves, and manual binding is needed;

6) the notch part, the tooth part and the yoke part can not provide effective support for copper wire winding, the wire is easy to break, and the space of the notch can not be fully utilized;

7) the span wire distance between the slots of the stator of the inner rotor traction machine is difficult to master, the rest copper wires are difficult to process, and the span wires between the phase belts need to be cut, welded and wrapped in an insulating way.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a three-phase branching single-tooth insulating plate of a distributed concentrated winding for an elevator traction machine, wherein the three-phase branching single-tooth insulating plate can enable the distributed concentrated winding for the elevator traction machine to adopt an automatic winding machine for winding, so that the labor productivity is greatly improved.

In order to achieve the purpose, the three-phase branching single-tooth insulating plate is divided into a plurality of groups of three-phase branching single-tooth insulating plate assemblies, each group of three-phase branching single-tooth insulating plate assemblies comprises a first insulating plate and a second insulating plate, the first insulating plate and the second insulating plate in each group of three-phase branching single-tooth insulating plate assemblies are respectively inserted into a stator tooth part from a first side and a second side opposite to each other in the axial direction of a stator core, and the first insulating plate and the second insulating plate are matched with each other to wrap the stator tooth part.

In a preferred embodiment of the present invention, the first insulating plate includes a first U-shaped insulating plate, a second U-shaped insulating plate, and a third U-shaped insulating plate, wherein the second U-shaped insulating plate and the third U-shaped insulating plate are symmetrically disposed on two sides of a first bottom plate in the first U-shaped insulating plate parallel to the circumferential direction of the stator core, and the notch of the second U-shaped slot of the second U-shaped insulating plate and the notch of the third U-shaped slot of the third U-shaped insulating plate are opposite in direction; the second insulating plate comprises a fourth U-shaped insulating plate, a fifth U-shaped insulating plate and a sixth U-shaped insulating plate, wherein the fifth U-shaped insulating plate and the sixth U-shaped insulating plate are symmetrically provided with two sides of a fourth bottom plate in the fourth U-shaped insulating plate, which are parallel to the circumferential direction of the stator core, and the notch of a fifth U-shaped groove of the fifth U-shaped insulating plate is opposite to the notch of a sixth U-shaped groove of the sixth U-shaped insulating plate in direction; the second U-shaped insulating plate in each first insulating plate, the third U-shaped insulating plate in the adjacent first insulating plate and the fifth U-shaped insulating plate in each second insulating plate corresponding to the first insulating plate and the sixth U-shaped insulating plate adjacent to the fifth insulating plate are matched with each other and buckled on a stator tooth part to wrap the stator tooth part; and a coil cavity is formed by the second bottom plate in the second U-shaped insulating plate of each first insulating plate, the third bottom plate in the third U-shaped insulating plate of the first insulating plate, the first bottom plate in the first U-shaped insulating plate of the first insulating plate, the fifth bottom plate in the fifth U-shaped insulating plate of each corresponding second insulating plate, the sixth bottom plate in the sixth U-shaped insulating plate of the second insulating plate and the fourth bottom plate in the fourth U-shaped insulating plate of the second insulating plate.

In a preferred embodiment of the present invention, the second U-shaped insulating plate further includes a second outer plate and a second inner plate, the second outer plate and the second inner plate are respectively disposed at the outer side and the inner side of the second bottom plate and surround a second U-shaped groove; the third U-shaped insulating plate also comprises a third outer side plate and a third inner side plate, wherein the third outer side plate and the third inner side plate are respectively arranged at the outer side and the inner side of the third bottom plate and enclose a third U-shaped groove; the fifth U-shaped insulating plate also comprises a fifth outer side plate and a fifth inner side plate, wherein the fifth outer side plate and the fifth inner side plate are respectively arranged at the outer side and the inner side of the fifth bottom plate and enclose a fifth U-shaped groove; the sixth U-shaped insulating plate also comprises a sixth outer side plate and a sixth inner side plate, wherein the sixth outer side plate and the sixth inner side plate are respectively arranged at the outer side and the inner side of the sixth bottom plate and enclose a sixth U-shaped groove; the second bottom plate, the second outer side plate, the second inner side plate of the second U-shaped insulating plate of each first insulating plate, the third bottom plate of the third U-shaped insulating plate adjacent to the first insulating plate, the third outer side plate, the third inner side plate and the fifth bottom plate, the fifth outer side plate, the fifth inner side plate of the fifth U-shaped insulating plate of each second insulating plate corresponding to the first insulating plate, the sixth bottom plate, the sixth outer side plate and the sixth inner side plate of the sixth U-shaped insulating plate of the second insulating plate adjacent to the second insulating plate are matched and buckled on a stator tooth part.

In a preferred embodiment of the present invention, a second bottom end lap, a second outer side end lap and a second inner side end lap are respectively provided at ends of the second bottom plate, the second outer side plate and the second inner side plate, which are away from the first U-shaped insulating plate; a third bottom end lap edge, a third outer side end lap edge and a third inner side end lap edge are respectively arranged at the ends, far away from the first U-shaped insulating plate, of the third bottom plate, the third outer side plate and the third inner side plate; a fifth bottom end lap, a fifth outer side end lap and a fifth inner side end lap are respectively arranged at the ends, far away from the fourth U-shaped insulating plate, of the fifth bottom plate, the fifth outer side plate and the fifth inner side plate; a sixth bottom end lap edge, a sixth outer side end lap edge and a sixth inner side end lap edge are respectively arranged at the ends, far away from the fourth U-shaped insulating plate, of the sixth bottom plate, the sixth outer side plate and the sixth inner side plate; the second bottom end overlap, the second outer end overlap and the second inner end overlap are respectively in lap joint with the fifth bottom end overlap, the fifth outer end overlap and the fifth inner end overlap, and the third bottom end overlap, the third outer end overlap and the third inner end overlap are respectively in lap joint with the sixth bottom end overlap, the sixth outer end overlap and the sixth inner end overlap.

In a preferred embodiment of the present invention, the second base end overlap, the second outer end overlap, the second inner end overlap, the third base end overlap, the third outer end overlap, and the third inner end overlap are attached to the stator teeth, the fifth base end overlap, the fifth outer end overlap, and the fifth inner end overlap the second base end overlap, the second outer end overlap, and the second inner end overlap, respectively, and the sixth base end overlap, the sixth outer end overlap, and the sixth inner end overlap the third base end overlap, the third outer end overlap, and the third inner end overlap, respectively.

In a preferred embodiment of the present invention, the lengths of the second bottom end lap, the second outer end lap, the second inner end lap, the fifth bottom end lap, the fifth outer end lap, the fifth inner end lap, the third bottom end lap, the third outer end lap, the third inner end lap, the sixth bottom end lap, the sixth outer end lap and the sixth inner end lap are all 2 to 6 mm; the thicknesses of the second bottom end overlap edge, the second outer end overlap edge, the second inner end overlap edge, the fifth bottom end overlap edge, the fifth outer end overlap edge, the fifth inner end overlap edge, the third bottom end overlap edge, the third outer end overlap edge, the third inner end overlap edge, the sixth bottom end overlap edge, the sixth outer end overlap edge and the sixth inner end overlap edge are respectively 0.4-0.5 times of the thicknesses of the second bottom plate, the second inner side plate, the second outer side plate, the fifth bottom plate, the fifth inner side plate, the fifth outer side plate, the third bottom plate, the third inner side plate, the third outer side plate, the sixth bottom plate, the sixth inner side plate and the sixth outer side plate.

In a preferred embodiment of the present invention, a second outside lap is provided on a side of the second outside plate adjacent to the notch of the second U-shaped groove, and a third outside lap is provided on a side of the third outside plate adjacent to the notch of the third U-shaped groove; a fifth outer side lap is provided on the side of the fifth outer side plate adjacent to the notch of the fifth U-shaped groove; a sixth outer side lap is arranged on the side, close to the notch of the sixth U-shaped groove, of the sixth outer side plate; the second outside-side lap in the second U-shaped insulating plate of each first insulating plate overlaps with the third outside-side lap in the third U-shaped insulating plate of the adjacent one of the first insulating plates, and the fifth outside-side lap in the fifth U-shaped insulating plate of each second insulating plate overlaps with the sixth outside-side lap in the sixth U-shaped insulating plate of the adjacent one of the second insulating plates.

In a preferred embodiment of the present invention, the second outside lap, the third outside lap, the fifth outside lap, and the sixth inside and outside lap have widths of 2 to 6mm and thicknesses of 0.4 to 0.5 times as large as the second outside plate, the third outside plate, the fifth outside plate, and the sixth outside plate, respectively.

In a preferred embodiment of the present invention, the second outer lap and the fifth outer lap are in close contact with the stator teeth, and the third outer lap and the sixth outer lap are respectively lapped on the second outer lap and the fifth outer lap.

In a preferred embodiment of the present invention, the widths of the second, third, fifth and sixth outer side plates are respectively greater than the widths of the second, third, fifth and sixth inner side plates; the width of the second inner side panel is equal to the width of the fifth inner side panel; the sum of the widths of the second inner side panel and the second inner side lap is equal to the sum of the widths of the fifth inner side panel and the fifth inner side lap; the width of the third inner side panel is equal to the width of the sixth inner side panel; the sum of the widths of the sixth outer panel and the sixth outer side lap is greater than the width of the third outer panel.

In a preferred embodiment of the present invention, a distance between a contact line between the sixth outer side tap of each second insulating plate and the fifth outer side plate of an adjacent one of the second insulating plates and a contact line between the third outer side tap of each first insulating plate and the second outer side plate of an adjacent one of the first insulating plates is 1 to 2 mm.

In a preferred embodiment of the invention, the difference between the width of the second inner side panel and the width of the second outer side panel, the difference between the width of the third inner side panel and the width of the third outer side panel, the difference between the width of the fifth inner side panel and the width of the fifth outer side panel, and the difference between the width of the sixth inner side panel and the width of the sixth outer side panel are each 1-3 mm.

In a preferred embodiment of the present invention, the first U-shaped insulating plate further includes a first inner side plate and a first outer side plate, the first inner side plate and the first outer side plate are respectively disposed on the inner side and the outer side of the first bottom plate and enclose a first U-shaped groove; the width of the first inner side panel is equal to the distance between the edge of the second inner side panel and the edge of the third inner side panel; chamfers are arranged on two sides of the first inner side plate in the width direction; the distance between the edge of the first inner side plate in the length direction and the first side of the stator core in the axial direction is 1-5 mm; the distance between the two sides of the first inner side plate in the width direction and the cavity walls of the two sides of the coil cavity, namely the surface of the second bottom plate adjacent to the coil cavity and the surface of the third bottom plate adjacent to the coil cavity, is 1-3 mm; the inner surface of the first inner side panel protrudes beyond the inner surfaces of the second and third inner side panels; the width of the first outer side panel is equal to the distance between the edge of the second outer side flap and the edge of the third outer side flap.

In a preferred embodiment of the present invention, the end of the first bottom plate adjacent to the first outer side plate protrudes from the outer surface of the first outer side plate in the outer diameter direction of the stator core, the width of the portion of the first bottom plate protruding from the outer surface of the first outer side plate is equal to the width of the first outer side plate, and a wire outlet notch and a wire inlet notch are symmetrically formed on the portion of the first bottom plate protruding from the outer surface of the first outer side plate; three layers of steps are symmetrically arranged on the first outer side plate along the width direction of the first outer side plate, the height of each layer of step is 4.5-7.5 mm added to the total thickness of one tooth winding, and the distance between each step and the outer shell is 2-3 times of the wire diameter to meet the minimum electrical insulation distance and creepage distance and the allowance of 2-5 mm; each step is provided with a partition board protruding towards the outer diameter direction of the stator core and six partition boards, the distance between the outer edges of the two partition boards on the first step, which is farthest away from the part of the outer surface of the first bottom board protruding out of the first outer side board, is equal to the distance between the inner edges of the two partition boards on the second step, and the distance between the outer edges of the two partition boards on the third step, which is closest to the part of the outer surface of the first bottom board protruding out of the first outer side board, is equal to the distance between the outer edges of the two vertical boards on the second step; the projections of the three partition plates positioned on one side of the first outer side plate in the width direction and parallel to the length direction of the first outer side plate are all in the wire inlet notch, the projections of the three partition plates positioned on the other side of the first outer side plate in the width direction and parallel to the length direction of the first outer side plate are all in the wire outlet notch, and the height of each partition plate is 3-6 mm; the outermost sides of the first outer side plates in the width direction are respectively provided with a protrusion for overline between the teeth of the first outer side plates, the distance between the protrusion for overline between each first outer side plate tooth and the overline of the three-phase belt is 2-3 times of the wire diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance; the projections for overline between the two first outer side plate teeth are divided into projections for overline between the first outer side plate left teeth and projections for overline between the first outer side plate right teeth and teeth, the outer edges of the projections for overline between the first outer side plate left teeth and teeth are flush with the outer edge of the second outer side plate, and the outer edges of the projections for overline between the first outer side plate right teeth and teeth are flush with the outer edge of the third outer side plate; the projection for overline between the first outer side plate left tooth and the tooth is provided with a projection overlap edge for overline between the first outer side plate left tooth and the tooth, the projection for overline between the first outer side plate right tooth and the tooth is provided with a projection overlap edge for overline between the first outer side plate right tooth and the tooth, the width of the projection overlap edge for overline between the first outer side plate left tooth and the width of the projection overlap edge for overline between the first outer side plate right tooth and the tooth are 2-6 mm, the thickness of the projection for overline between the first outer side plate left tooth and the thickness of the projection for overline between the first outer side plate right tooth and the tooth are 0.4-0.5 times respectively, the outer edge of the projection overlap edge for overline between the first outer side plate left tooth and the tooth is flush with the outer edge of the second outer side overlap edge, and the outer edge of the projection overlap edge for overline between the first outer side plate right tooth and the tooth is flush with the outer edge of the third outer side overlap edge; during assembly, the projection overlap edge for overline between the right tooth and the tooth of the first outer side plate on one first insulation plate is overlapped on the projection overlap edge for overline between the left tooth and the tooth of the first outer side plate on the adjacent first insulation plate.

In a preferred embodiment of the present invention, the fourth U-shaped insulating plate further includes a fourth outer side plate and a fourth inner side plate, the fourth outer side plate and the fourth inner side plate are respectively disposed at the outer side and the inner side of the fourth bottom plate and enclose a fourth U-shaped groove; a fourth bottom plate protrusion is provided on a side of the fourth bottom plate adjacent to the fourth outer side plate, the fourth bottom plate protrusion protruding from an outer surface of the fifth outer side plate and an outer surface of the sixth outer side plate in an outer diameter direction of the stator core; the fourth outer side plate is arranged in the middle of the fourth bottom plate protruding part, the width of the fourth outer side plate is approximately equal to the width of the coil cavity, and two sides of the fourth outer side plate in the width direction are respectively provided with a chamfer; a projection for crossing lines between the fourth outer plate teeth and the teeth is arranged on the outermost side of the projecting part of the fourth bottom plate in the width direction, the distance between the projection for crossing lines between each fourth outer plate tooth and the teeth and the crossing lines of the three-phase belt is 2-3 times of the line diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance; the projections for overline between the teeth of the two fourth outer side plates are divided into projections for overline between the left teeth of the fourth outer side plates and projections for overline between the right teeth of the fourth outer side plates, the outer edges of the projections for overline between the left teeth of the fourth outer side plates and the teeth are flush with the outer edge of the fifth outer side plate, and the outer edges of the projections for overline between the right teeth of the fourth outer side plates and the teeth are flush with the outer edge of the sixth outer side plate; the projection for overline between the fourth outer side plate left tooth and the tooth is provided with a projection overlap edge for overline between the fourth outer side plate left tooth and the tooth, the projection for overline between the fourth outer side plate right tooth and the tooth is provided with a projection overlap edge for overline between the fourth outer side plate right tooth and the tooth, the width of the projection overlap edge for overline between the fourth outer side plate left tooth and the width of the projection overlap edge for overline between the fourth outer side plate right tooth and the tooth are 2-6 mm, the thickness of the projection for overline between the fourth outer side plate left tooth and the thickness of the projection for overline between the first outer side plate right tooth and the tooth are 0.4-0.5 times, the outer edge of the projection overlap edge for overline between the fourth outer side plate left tooth and the tooth is flush with the outer edge of the fifth outer side overlap edge, and the outer edge of the projection overlap edge for overline between the fourth outer right tooth and the tooth are flush with the outer edge of the sixth outer side overlap edge; when the cable is assembled, the overline between the right teeth and the teeth of the fourth outer side plate on one first insulation plate is lapped on the overline between the left teeth and the teeth of the fourth outer side plate on the adjacent first insulation plate by using the protruding overlap edge; the width of the fourth inner side panel is equal to the distance between the edge of the fifth inner side panel and the edge of the sixth inner side panel; chamfers are arranged on two sides of the fourth inner side plate in the width direction; the distance between the edge of the fourth inner side plate in the length direction and the second side of the stator core in the axis direction is 1-5 mm.

Due to the adoption of the technical scheme, the winding device can be suitable for winding the stator of the tractor with the inner rotor or the outer rotor, and the first insulating plate and the second insulating plate are in a laminated structure, the adjacent first insulating plates are in a laminated structure, and the contact between the copper wire and the stator core is effectively isolated; notches are designed on the first insulating plate and the second insulating plate, and the teeth and the yoke can provide effective support for copper wire winding; the cross-line conditions between the grooves and between the same phase belt are met; the inner rotor traction machine stator has the advantages that the tooth-to-tooth overline can occupy the slot space, and the first insulation plate is provided with a corresponding first U-shaped insulation plate so as to facilitate the wire overline from the first U-shaped insulation plate by winding; corresponding clapboards and supports are arranged on the cross lines between the phase belts of the same phase, so that the cross lines are not cut off, and the labor cost is saved; copper lines between different phases are provided with the partition plates to meet the requirements of sufficient electrical insulation distance and creepage distance, the insulation problems of shearing, welding and processing when the phases are crossed are avoided, and the copper lines, silver-tin welding and labor cost are greatly saved.

In addition, the invention can distribute concentrated windings in a winding way so as to greatly improve the labor productivity. When the machine winds the distributed concentrated windings, the copper wires are arranged neatly, the copper wires are tightly attached to the stator tooth parts, the end parts are small, and the copper wires are saved. Because the opening of the coil cavity is small, the cogging torque is small, the copper wire has large tension when being wound, and the insulation paper is not needed for insulation in the coil cavity.

Drawings

Fig. 1 is a schematic view illustrating a state where a first insulating plate and a second insulating plate of the present invention are inserted into a stator tooth plate on a stator core.

FIG. 2 is a schematic view (viewed from one direction) of the structure of the first insulating sheet according to the present invention

FIG. 3 is a schematic view showing the structure of a first insulating sheet according to the present invention (seen from another direction)

FIG. 4 is a schematic view (seen from one direction) of the structure of a second insulating plate according to the present invention

FIG. 5 is a schematic view of the structure of a second insulating plate according to the present invention (seen from another direction)

Fig. 6 is a schematic view of the assembly of two first insulating plates and two second insulating plates of the present invention with each other.

Fig. 7 is a schematic view of fig. 6 taken along direction a.

Fig. 8 is a perspective view of a stator wire assembly assembled with a first insulation plate and a second insulation plate.

Detailed Description

The invention is further described below in conjunction with the appended drawings and detailed description.

Referring to fig. 1, the three-phase branching single-tooth insulating board of the present invention shown in the drawing is divided into a plurality of groups of three-phase branching single-tooth insulating board assemblies, each group of three-phase branching single-tooth insulating board assemblies includes two parts, namely a first insulating board 100 and a second insulating board 200, the first insulating board 100 and the second insulating board 200 in each group of three-phase branching single-tooth insulating board assemblies are respectively inserted into a stator tooth portion 310 from a first side 320 and a second side 330 opposite to each other in the axial direction of a stator core 300, and the first insulating board 100 and the second insulating board 200 are mutually matched to wrap the stator tooth portion 310.

Referring to fig. 2 and 3, the first insulating plate 100 includes a first U-shaped insulating plate 110, a second U-shaped insulating plate 120, and a third U-shaped insulating plate 130. Wherein the second U-shaped insulating plate 120 and the third U-shaped insulating plate 130 are symmetrically disposed on both sides of the first base plate 111 of the first U-shaped insulating plate 110 parallel to the circumferential direction of the stator core 300, and the notch of the second U-shaped groove 124 of the second U-shaped insulating plate 120 and the notch of the third U-shaped groove 134 of the third U-shaped insulating plate 130 are opposite in direction.

The second U-shaped insulating plate 120 includes a second bottom plate 121, a second outer plate 122 and a second inner plate 123, the second outer plate 122 and the second inner plate 123 are respectively disposed on the outer side and the inner side of the second bottom plate 121 and enclose a second U-shaped groove 124; the second outer side plate 122, the second inner side plate 123 and the second bottom plate 121 are transitionally connected by round corners 125 and 126. A second base end lap 121a, a second outer side end lap 122a, and a second inner side end lap 123a are respectively provided at ends of the second base plate 121, the second outer side plate 122, and the second inner side plate 123 remote from the first U-shaped insulating plate 110. A second outside overlap 122b is provided on the side of the second outside plate 122 adjacent to the notch of the second U-shaped groove 124. The width of the second exterior plate 122 is greater than the width of the second interior plate 123 by a difference of 1-3 mm.

The third U-shaped insulating plate 130 includes a third bottom plate 131, a third outer side plate 132 and a third inner side plate 133, wherein the third outer side plate 132 and the third inner side plate 133 are respectively arranged at the outer side and the inner side of the third bottom plate 131 and enclose a third U-shaped groove 134; the third outer side plate 132, the third inner side plate 133 and the third bottom plate 131 are transitionally connected by fillets 135 and 136. A third base end lap 131a, a third outer end lap 132a and a third inner end lap 133a are respectively provided at ends of the third bottom plate 131, the third outer side plate 132 and the third inner side plate 133 remote from the first U-shaped insulating plate 110. The width of the third outer side plate 132 is greater than the width of the third inner side plate 133. A third outer side lap 132b is provided on the side of the third outer side plate 132 adjacent to the notch of the third U-shaped groove 134. The width of the third outer side plate 132 is greater than the width of the third inner side plate 133 by a difference of 1-3 mm.

The lengths of the second bottom end overlap edge 121a, the second outer side end overlap edge 122a, the second inner side end overlap edge 123a, the third bottom end overlap edge 131a, the third outer side end overlap edge 132a and the third inner side end overlap edge 133a are all 2-6 mm; the thicknesses of the second bottom end overlap 121a, the second outer end overlap 122a, the second inner end overlap 123a, the third bottom end overlap 131a, the third outer end overlap 132a, and the third inner end overlap 133a are 0.4 to 0.5 times the thicknesses of the second bottom plate 121, the second outer side plate 122, the second inner side plate 123, the third bottom plate 131, the third outer side plate 132, and the third inner side plate 133, respectively.

The second outer side lap 122b and the third outer side lap 132b have a width of 2 to 6mm and a thickness of 0.4 to 0.5 times that of the second outer side lap 122 and the third outer side lap 132, respectively.

The first U-shaped insulating plate 110 further includes a first outer side plate 112 and a first inner side plate 113, the first outer side plate 112 and the first inner side plate 113 are respectively disposed outside and inside the first base plate 111 and enclose a first U-shaped groove 114; the width of the first inner side plate 113 is equal to the distance between the edge of the second inner side plate 123 and the edge of the third inner side plate 133; the distance between the two sides of the first inner side plate 113 in the width direction and the cavity walls of the two sides of the coil cavity 400, namely the surface 121b of the second bottom plate 121 adjacent to the coil cavity 400 and the surface 131b of the third bottom plate 131 adjacent to the coil cavity 400, is 1-3mm, and chamfers are arranged on the two sides of the first inner side plate 113 in the width direction; the distance between the edge 113a of the first inner side plate 113 in the length direction and the first side 320 of the stator core 300 in the axial direction is 1-5 mm; the purpose of this is: the first inner side plate 113 limits the part of the coil close to the orifice of the coil cavity 400, chamfers are arranged on two sides of the first inner side plate 113 in the width direction, so that wire cutting during winding is avoided, and meanwhile, the first U-shaped insulating plate 110 is interfered by the rotor after being stressed and deformed and influences winding after the orifice of the coil cavity 400 is deformed during winding.

The inner surface 113b of the first inner side plate 113 protrudes beyond the inner surfaces 123b, 133b of the second and third inner side plates 123, 133; the width of first outer side panel 112 is equal to the distance between the edge of second outer side flap 122b and the edge of third outer side flap 132 b.

The end of the first base plate 111 adjacent to the first outer plate 112 protrudes the outer surface 112a of the first outer plate 112 in the outer diameter direction of the stator core 300, and the width of the portion 111a of the first base plate 111 protruding the outer surface 112a of the first outer plate 112 is equal to the width of the first outer plate 112; a wire outlet notch 111b and a wire inlet notch 111c are symmetrically formed on a portion 111a of the first bottom plate 111 protruding out of the outer surface of the first outer side plate 112.

Three layers of steps 112b, 112c and 112d are symmetrically arranged on the first outer side plate 112 along the width direction of the first outer side plate 112, the height of each layer of steps 112b, 112c and 112d is 4.5-7.5 mm added to the total thickness of one tooth winding, and the distance between all the steps 112b, 112c and 112d and an outer shell is 2-3 times of the wire diameter and meets the minimum electrical insulation distance, the creepage distance and the allowance of 2-5 mm. The purpose of this is: the coils near the stator yoke are limited.

Each of the steps 112b, 112c, and 112d is provided with a spacer projecting in the outer diameter direction of the stator core, and six spacers 115a, 115b, 115c, 115d, 115e, and 115f are provided. The distance between the outer edges of the two partition plates 115a, 115b on the first step 112b farthest from the portion 111a of the first bottom plate 111 protruding the outer surface 112a of the first outer side plate 112 is equal to the distance between the inner edges of the two partition plates 115c, 115d on the second step 112c, and the distance between the outer edges of the two partition plates 115e, 115f on the third step 112d closest to the portion 111a of the first bottom plate 111 protruding the outer surface 112a of the first outer side plate 112 is equal to the distance between the inner edges of the two partition plates 115c, 115d on the second step 112 c.

The projections of the three partition boards 115a, 115c and 115e positioned on one side of the first outer board 112 in the width direction are all in the wire inlet notch 111b in the direction parallel to the length direction of the first outer board 112, and the projections of the three partition boards 115b, 115d and 115f positioned on the other side of the first outer board 112 in the direction parallel to the length direction of the first outer board 112 are all in the wire outlet notch 111 c. Each of the partitions 115a, 115b, 115c, 115d, 115e, and 115f has a height of 3 to 6 mm. The purpose of this is: each step 112b, 112c, 112d is provided with a clapboard protruding to the outer diameter direction of the stator core, so as to facilitate the mold opening, and when one phase belt of a certain phase is wound and strides over another phase belt of the same phase to continue to be wound, the copper wire of the phase is separated from the other two phases by the clapboard. The copper wires are separated after being led into two adjacent partition plates 115a, 115b, 115c, 115d, 115e and 115f from the wound coil, so that space isolation is formed, and contact between three-phase copper wires is avoided.

The outermost sides of the first outer side plates 112 in the width direction are respectively provided with a protrusion for overline between the teeth of the first outer side plates, the distance between the protrusion for overline between each first outer side plate tooth and the overline of the three-phase belt is 2-3 times of the wire diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance. The purpose of this is: the cross line of the teeth is realized by the protrusion between the first outer plate teeth,

the projections for overline between the two first outer plate teeth are divided into a projection 116 for overline between the first outer plate left tooth and the tooth and a projection 117 for overline between the first outer plate right tooth and the tooth, the outer edge of the projection 116 for overline between the first outer plate left tooth and the tooth is flush with the outer edge of the second outer plate 122, and the outer edge of the projection 117 for overline between the first outer plate right tooth and the tooth is flush with the outer edge of the third outer plate 132.

A projection overlap edge 116a for the crossover between the first outer panel left tooth and the tooth is provided on the projection 116 for the crossover between the first outer panel left tooth and the tooth, the projection 117 for the crossover between the first outer panel right tooth and the tooth is provided with a projection overlap 117a for the crossover between the first outer panel right tooth and the tooth, the width of the projection overlap 116a for the crossover between the first outer panel left tooth and the width of the projection overlap 117a for the crossover between the first outer panel right tooth and the tooth are 2 to 6mm, the thicknesses are respectively 0.4 to 0.5 times the thickness of the projection 116 for the crossover between the first outer panel left tooth and the thickness of the projection 117 for the crossover between the first outer panel right tooth and the tooth, the outer edge of the projection overlap 116a for the crossover between the first outer panel left tooth and the tooth is flush with the outer edge of the second outer overlap 122b, and the outer edge of the projection overlap 117a for the crossover between the first outer panel right tooth and the tooth is flush with the outer edge of the third outer overlap 132 b.

Referring to fig. 4 and 5, the second insulating plate 200 includes a fourth U-shaped insulating plate 210, a fifth U-shaped insulating plate 220, and a sixth U-shaped insulating plate 230, wherein the fifth U-shaped insulating plate 220 and the sixth U-shaped insulating plate 230 are symmetrically disposed at both sides of the fourth base plate 211 in the fourth U-shaped insulating plate 210 in parallel to the circumferential direction of the stator core 300, and the notch of the fifth U-shaped groove 224 of the fifth U-shaped insulating plate 220 and the notch of the sixth U-shaped groove 234 of the sixth U-shaped insulating plate 230 are opposite in direction.

The fifth U-shaped insulating plate 220 includes a fifth base plate 221, a fifth outer plate 222, and a fifth inner plate 223, and the fifth outer plate 222 and the fifth inner plate 223 are respectively disposed on the outer and inner sides of the fifth base plate 221 and enclose a fifth U-shaped groove 224. The fifth outer side plate 222, the fifth inner side plate 223 and the fifth bottom plate 221 are connected in a transition manner by using round corners 225 and 226. Fifth base end lap 221a, fifth outer end lap 222a and fifth inner end lap 223a are respectively provided at ends of the fifth base plate 221, the fifth outer side plate 222 and the fifth inner side plate 223 which are away from the fourth U-shaped insulating plate 210; a fifth outside side lap 222b is provided on the side of the fifth outside plate 222 adjacent to the notch of the fifth U-shaped groove 224; the width of the fifth outer plate 222 is greater than the width of the fifth inner plate 223 by 1-3 mm. In addition, the width of the fifth inner side plate 223 is equal to the width of the second inner side plate 123, and the sum of the widths of the fifth outer side plate 222 and the fifth outer side lap 222b is equal to the sum of the widths of the second outer side plate 122 and the second outer side lap 122 b. The width of the fifth inner side plate 223 is equal to the width of the second inner side plate 123.

The sixth U-shaped insulating plate 230 includes a sixth bottom plate 231, a sixth outer plate 232 and a sixth inner plate 233, the sixth outer plate 232 and the sixth inner plate 233 are respectively disposed outside and inside the sixth bottom plate 231 and enclose a sixth U-shaped groove 234; the sixth outer side plate 232, the sixth inner side plate 233 and the sixth bottom plate 231 are connected in a transition manner by fillets 235 and 236. A sixth base end lap 231a, a sixth outer end lap 232a and a sixth inner end lap 233a are respectively provided at ends of the sixth base plate 231, the sixth outer side plate 232 and the sixth inner side plate 233 remote from the fourth U-shaped insulating plate 210; a sixth outer side lap 232b is provided on the side of the sixth outer side plate 232 adjacent to the notch of the sixth U-shaped groove 234; the width of the sixth outer plate 232 is greater than the width of the sixth inner plate 233, and the difference between the widths is 1-3 mm. In addition, the width of the sixth inner panel 233 is equal to the width of the third inner panel 133, while the sum of the widths of the sixth outer panel 233 and the sixth outer side lap 233a is equal to the sum of the widths of the third outer panel 132 and the second outer side lap 132 b. The width of the sixth inner side plate 233 is equal to the width of the third inner side plate 133.

The lengths of the fifth bottom lap 221a, the fifth outer end lap 222a, the fifth inner end lap 223a, the sixth bottom lap 231a, the sixth outer end lap 232a and the sixth inner end lap 233a are all 2-6 mm; the thicknesses of the fifth base lap 221a, the fifth outer end lap 222a, the fifth inner end lap 223a, the sixth base lap 231a, the sixth outer end lap 232a, and the sixth inner end lap 233a are 0.4 to 0.5 times the thicknesses of the fifth bottom plate 221, the fifth outer plate 222, the fifth inner plate 223, the sixth bottom plate 231, the sixth outer plate 232, and the fifth inner plate 233, respectively.

The fifth outer side bead 222b and the sixth outer side bead 232b have a width of 2 to 6mm and a thickness of 0.4 to 0.5 times the thickness of the fifth outer side plate 222 and the sixth outer side plate 232, respectively.

The fourth U-shaped insulating plate 210 further includes a fourth outer side plate 212 and a fourth inner side plate 213, and the fourth outer side plate 212 and the fourth inner side plate 213 are respectively disposed at the outer side and the inner side of the fourth base plate 211 and enclose a fourth U-shaped groove 214.

A fourth base plate protrusion 215 is provided on the fourth base plate 211 on a side adjacent to the fourth outer side plate 212, and the fourth base plate protrusion 215 protrudes from an outer surface 222c of the fifth outer side plate 222 and an outer surface 232c of the sixth outer side plate 232 in an outer diameter direction of the stator core 300; the fourth outer side plate 212 is disposed at a middle position of the fourth bottom plate protrusion 215, and the width of the fourth outer side plate 212 is substantially equal to the width of the coil cavity 400 (see fig. 6), and a chamfer is provided on each of both sides of the fourth outer side plate 212 in the width direction.

And the outermost side of the fourth bottom plate protruding part 215 in the width direction is respectively provided with a fourth outer side plate tooth and a projection for overline between teeth, the distance between the projection for overline between each fourth outer side plate tooth and the overline of the three-phase belt is 2-3 times of the wire diameter plus a certain distance and 1-3mm allowance, and the certain distance meets the minimum electrical insulation distance and creepage distance.

The projections for overline between the two fourth outer side plate teeth are divided into projections 216 for overline between the fourth outer side plate left teeth and projections 217 for overline between the fourth outer side plate right teeth and teeth, the outer edge of the projection 216 for overline between the fourth outer side plate left teeth and teeth is flush with the outer edge of the fifth outer side plate 222, and the outer edge of the projection 217 for overline between the fourth outer side plate right teeth and teeth is flush with the outer edge of the sixth outer side plate 232; a projection overlap 216a for the crossover between the left tooth and the tooth of the fourth outer plate is provided on the projection 216 for the crossover between the left tooth and the tooth of the fourth outer plate, the projection 217 for overline between the fourth outer panel right tooth and tooth is provided with a projection overlap 217a for overline between the fourth outer panel right tooth and tooth, the width of the projection overlap 216a for overline between the fourth outer panel left tooth and the width of the projection overlap 217a for overline between the fourth outer panel right tooth and tooth are 2 to 6mm, the thicknesses thereof are 0.4 to 0.5 times as large as the projection 216 for overline between the fourth outer panel left tooth and the projection 217 for overline between the first outer panel right tooth and tooth, respectively, the outer edge of the projection overlap 216a for overline between the fourth outer panel left tooth and tooth is flush with the outer edge of the fifth outer overlap 222b, and the outer edge of the projection overlap 217a for overline between the fourth outer panel right tooth and tooth is flush with the outer edge of the sixth outer overlap 232 b.

The width of the fourth inner side plate 213 is equal to the distance between the edge of the fifth inner side plate 223 and the edge of the sixth inner side plate 233; chamfers are arranged on both sides of the fourth inner side plate 213 in the width direction; the distance between the edge of the fourth inner side plate 213 in the length direction and the second side 330 of the stator core 300 in the axial direction is 1-5 mm.

During assembly, the first insulating plate 100 and the second insulating plate 200 in each group of three-phase branching single-tooth insulating plate assemblies are respectively inserted on the first stator tooth part 310 from the first side 320 and the second side 330 opposite to each other in the axial direction of the stator core 300; after insertion, the second base end tap 121a, the second outer end tap 122a, the second inner end tap 123a, the third base end tap 131a, the third outer end tap 132a, the third inner end tap 133a, the third outer end tap 132b, and the fifth outer end tap 222b are closely attached to the stator teeth 310, the fifth base end tap 221a, the fifth outer end tap 222a, and the fifth inner end tap 223a are respectively overlapped with the second base end tap 121a, the second outer end tap 122a, and the second inner end tap 123a, and the sixth base end tap 231a, the sixth outer end tap 232a, and the sixth inner end tap 233a are respectively overlapped with the third base end tap 131a, the third outer end tap 132a, and the third inner end tap 133a, so that the first base plate 121 of the second U-shaped insulating plate 120 of each first insulating plate 100 and the third base plate 131 of the third insulating plate 130 of the first insulating plate 100 are respectively overlapped with the second base plate 121a, the third outer end tap 122a, the third outer end tap 133a, the fifth end tap 133a, and the fifth end tap 223a of the second insulating plate 100, The first bottom plate 111 of the first U-shaped insulating plate 110 of the first insulating plate 100, the corresponding fifth bottom plate 221 of the fifth U-shaped insulating plate 220 of each second insulating plate 200, the sixth bottom plate 231 of the sixth U-shaped insulating plate 230 of the second insulating plate 200, and the fourth bottom plate 211 of the fourth U-shaped insulating plate 210 of the second insulating plate 200 together enclose a coil cavity 400.

Meanwhile, the second outer-side lap 122b of the first insulating plates 100 of the adjacent two groups is lapped on the third outer-side lap 132b, and the projection lap 117a for overline between the right teeth and the inter-teeth of the first outer plates of the first insulating plates 100 of the adjacent two groups is lapped on the projection lap 116a for overline between the left teeth and the inter-teeth of the first outer plates; the sixth outer-side lap 232a of the second insulating plate 200 of the adjacent two groups is lapped over the fifth outer-side lap 222a, and the interline projection lap 217a between the right teeth and the teeth of the fourth outer-side plate is lapped over the interline projection lap 216a between the left teeth and the teeth of the fourth outer-side plate. The purpose of this is: the first insulating plate 100 and the second insulating plate 200 are combined with the stator core 300 more firmly while insulation is ensured, and winding is facilitated.

After assembly, the distance between the contact line 500 between the sixth outside lap 232a of each second insulating plate 200 and the fifth outside plate 222 of an adjacent one of the second insulating plates 200 and the contact line 600 between the third outside lap 132b of each first insulating plate 100 and the second outside plate 122 of an adjacent one of the first insulating plates 100 is 1 to 2 mm. The principle of doing so is: since a small square uncovered area 227 (see fig. 6) is formed at the junction between the fifth bottom end tap 221a and the fifth outside end tap 222a for design reasons between the fifth bottom end tap 221a and the fifth outside end tap 222a, full coverage of the fifth outside plate 222 and the sixth outside plate 232 is achieved by offsetting the contact line 500 between the sixth outside side tap 232a of each second insulation plate 200 and the fifth outside plate 222 of the adjacent one of the second insulation plates 200 from the contact line 600 between the third outside side tap 132b of each first insulation plate 100 and the second outside plate 122 of the adjacent one of the first insulation plates 100.

The second U-shaped insulating plate 120 of each first insulating plate 100, the third U-shaped insulating plate 130 of the adjacent first insulating plate 100, and the fifth U-shaped insulating plate 220 of each second insulating plate 200 corresponding to the first insulating plate 100 and the sixth U-shaped insulating plate 230 adjacent to the fifth insulating plate 220 are matched with each other and buckled on a stator tooth 310 to wrap the stator tooth 310; the method comprises the following steps: the second bottom plate 121, the second outer side plate 122, the second inner side plate 123 in the second U-shaped insulating plate 120 of each first insulating plate 100, the third bottom plate 131, the third outer side plate 132, the third inner side plate 133 in the third U-shaped insulating plate 130 of each adjacent first insulating plate 100, and the fifth bottom plate 221, the fifth outer side plate 222, the fifth inner side plate 223 in the fifth U-shaped insulating plate 220 of each second insulating plate 200 corresponding to the first insulating plate 100, the sixth bottom plate 231, the sixth outer side plate 232, and the sixth inner side plate 233 in the sixth U-shaped insulating plate 230 of the second insulating plate 200 adjacent to the second insulating plate 200 are fitted and fastened to one another on one stator tooth 310.