Stator punching sheet, stator core and motor

Abstract

The utility model discloses a stator punching sheet, a stator core and a motor, and relates to the technical field of motors, the stator punching sheet comprises an annular punching sheet body and a plurality of bosses; the inner side of the annular punching sheet body is provided with a plurality of stator grooves, and the plurality of stator grooves are distributed at intervals along the circumferential direction of the annular punching sheet body. The plurality of bosses are arranged on the outer side of the annular punching sheet body and are distributed at intervals in the circumferential direction of the annular punching sheet body, oil holes are formed in the bosses, and a concave area is formed between every two adjacent bosses; in the circumferential direction of the annular punching sheet body, the arc length of the boss is larger than that of the concave area. The stator punching sheet provided by the technical scheme of the utility model can realize confluence of cooling fluid on the premise of keeping welding effectiveness.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator punching sheet, a stator iron core and a motor. Background Art

[0002] The current stator core is usually cooled by cooling fluid (such as oil cooling). The cooling fluid needs to flow into the middle of the stator core and converge on both sides. Two different punching sheets are required, that is, additional oil collecting punching sheets need to be set up to achieve convergence. The existing stator punching sheets cannot simultaneously meet the effective welding of the outside of the stator core and the convergence of the cooling fluid. Utility Model Content

[0003] The main purpose of the utility model is to provide a stator punching sheet, a stator core and a motor, aiming to provide a stator punching sheet that can achieve the confluence of cooling fluid while maintaining the effectiveness of welding.

[0004] To achieve the above-mentioned purpose, the present invention provides a stator punching sheet, comprising:

[0005] An annular punching body, wherein a plurality of stator slots are provided on the inner side of the annular punching body, and the plurality of stator slots are distributed at intervals along the circumference of the annular punching body;

[0006] A plurality of bosses, the plurality of bosses being arranged on the outer side of the annular punch body and spaced apart along the circumference of the annular punch body, the bosses having oil holes formed therein, and a concave area being formed between two adjacent bosses;

[0007] Wherein, in the circumferential direction of the annular punch body, the arc length of the boss is greater than the arc length of the concave area.

[0008] In one embodiment, the oil hole is an arc-shaped hole.

[0009] In one embodiment, the oil hole is extended along the circumference of the annular punch body.

[0010] In one embodiment, the boss is provided with at least two oil holes, and the at least two oil holes are distributed at intervals along the circumference of the annular punch body.

[0011] In one embodiment, the plurality of bosses are distributed in an annular array along the center of the annular punch body.

[0012] To achieve the above objectives, the present invention further provides a stator core comprising:

[0013] An oil inlet punching plate group, wherein the oil inlet punching plate group comprises a plurality of stacked oil inlet punching plates, and adjacent two oil inlet punching plates are deflected by a first circumferential angle along the circumferential direction of the stator core;

[0014] Converging punches, both sides of the oil inlet punch group are provided with the converging punches;

[0015] Wherein, the oil inlet punching plate and the converging punching plate are both the stator punching plates as described above;

[0016] In two adjacent oil inlet punches, the oil hole of one oil inlet punch is connected to the concave area of ​​the other oil inlet punch; the bosses of the plurality of stator punches at least partially overlap in the axial direction of the stator core to form a weld.

[0017] In one embodiment, the oil inlet punch group includes at least three oil inlet punches.

[0018] In one embodiment, an oil channel punch is provided between the oil inlet punch group and the confluence punch, and the oil hole and concave area of ​​the oil inlet punch are connected to the oil hole and / or concave area of ​​the confluence punch through the oil channel oil hole of the oil channel punch.

[0019] In one embodiment, an oil injection punch is provided on a side of the converging punch away from the oil inlet punch group, and the oil injection hole of the oil injection punch is connected to the oil hole and the concave area of ​​the converging punch.

[0020] To achieve the above object, the present invention further provides a motor comprising:

[0021] chassis;

[0022] A stator, the stator being disposed in the housing, the stator comprising the stator core and stator winding as described above, the stator winding being disposed on the stator core;

[0023] A rotor is arranged in the stator.

[0024] The technical solution of the present invention is to provide multiple bosses on the outside of the annular punch body, with oil holes formed in the bosses, and in the circumferential direction of the annular punch body, the arc length of the bosses is greater than the arc length of the concave area. In this way, when the stator punch is applied to the stator core, because the arc length of the bosses is greater than the arc length of the concave area, the bosses of multiple stator punches can be at least partially overlapped in the axial direction of the stator core to form a weld bead, thereby maintaining the effectiveness of welding; in addition, the stator punch can also be used as a confluence punch to achieve the convergence of cooling fluid through the oil holes and concave areas of the stator punch. Therefore, the stator punch proposed in this solution can achieve the convergence of cooling fluid while maintaining the effectiveness of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A front view of a first embodiment of a stator punching sheet provided by the present utility model;

[0027] Figure 2 A front view of a second embodiment of a stator punching provided by the present utility model;

[0028] Figure 3 A partial structural front view of a third embodiment of a stator punching provided by the present utility model;

[0029] Figure 4 A partial structural front view of a fourth embodiment of a stator punching provided by the present utility model;

[0030] Figure 5 A partial structural front view of a fifth embodiment of a stator punching provided by the present utility model;

[0031] Figure 6 A partial structural front view of a sixth embodiment of a stator punching provided by the present utility model;

[0032] Figure 7 A side view of an embodiment of a stator core provided by the present utility model;

[0033] Figure 8 This is a front view of an oil channel punching sheet in an embodiment of a stator core provided by the present utility model;

[0034] Figure 9 A partial structural diagram of an embodiment of a stator core provided by the present utility model;

[0035] Figure 10 A side view of another embodiment of the stator core provided by the present invention;

[0036] Figure 11 This is a partial structural diagram of another embodiment of the stator core provided by the utility model.

[0037] Description of Figure Numbers:

[0038] 100, stator core; 10, stator punching sheet; 11, annular punching sheet body; 111, stator slot; 12, boss; 121, oil hole; 13, recessed area; 10a, oil inlet punching sheet group; 20, converging punching sheet; 30, oil channel punching sheet; 31, oil channel oil hole; 40, oil injection punching sheet; 41, oil injection hole; 50, weld bead.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The current stator core is usually cooled by cooling fluid (such as oil cooling). The cooling fluid needs to flow into the middle of the stator core and converge on both sides. Two different punching sheets are required, that is, additional oil collecting punching sheets need to be set up to achieve convergence. The existing stator punching sheets cannot simultaneously meet the effective welding of the outside of the stator core and the convergence of the cooling fluid.

[0044] The utility model provides a stator punching sheet, aiming to provide a stator punching sheet capable of achieving the convergence of cooling fluid while maintaining welding effectiveness.

[0045] See also Figures 1 to 6 In one embodiment of the present invention, the stator punching sheet 10 includes an annular punching sheet body 11 and a plurality of bosses 12; a plurality of stator slots 111 are provided on the inner side of the annular punching sheet body 11, and the plurality of stator slots 111 are distributed at intervals along the circumference of the annular punching sheet body 11; a plurality of bosses 12 are provided on the outer side of the annular punching sheet body 11 and distributed at intervals along the circumference of the annular punching sheet body 11, an oil hole 121 is formed in the boss 12, and a concave area 13 is formed between two adjacent bosses 12; wherein, in the circumference of the annular punching sheet body 11, the arc length of the boss 12 is greater than the arc length of the concave area 13.

[0046] The technical solution of the present invention is to provide a plurality of bosses 12 on the outer side of the annular punch body 11, and to form an oil hole 121 in the boss 12. In addition, in the circumferential direction of the annular punch body 11, the arc length of the boss 12 is greater than the arc length of the recessed area 13. In this way, when the stator punch 10 is applied to the stator core 100, since the arc length of the boss 12 is greater than the arc length of the recessed area 13, the bosses 12 of the plurality of stator punches 10 can be at least partially overlapped in the axial direction of the stator core 100 to form a weld bead 50, thereby maintaining the effectiveness of welding. In addition, the stator punch 10 can also be used as a converging punch 20 to achieve the convergence of the cooling fluid through the oil hole 121 and the recessed area 13 of the stator punch 10. Therefore, the stator punch 10 proposed in this solution can achieve the convergence of the cooling fluid while maintaining the effectiveness of welding.

[0047] In this embodiment, the oil hole 121 passes through both sides of the boss 12 in the axial direction of the stator punching 10. In this way, when the stator punching 10 is applied to the stator core 100, the oil hole 121 of one of the two adjacent stator punchings 10 can be connected to the recessed area 13 of the other stator punching 10 to realize the circulation of the cooling fluid and fully cool the motor.

[0048] In actual application, the cooling fluid can be cooling oil, cooling gas, cooling water, etc., which is not specifically limited here.

[0049] In this embodiment, the arc length of the boss 12 is greater than the arc length of the recessed area 13, which is equivalent to: in the circumferential direction of the annular punch body 11, the arc length of the boss 12 is defined as a, and the arc length of the boss 12 and the adjacent recessed area 13 is defined as b, then a>b / 2 is satisfied.

[0050] In actual application, one or at least two oil holes 121 may be formed in each boss 12 , and the shape of the oil hole 121 may be arc-shaped, rectangular, circular, etc.

[0051] Furthermore, when a plurality of oil holes 121 are formed in the boss 12 , the shapes and sizes of the plurality of oil holes 121 may be the same or different.

[0052] Specifically, see Figure 1 In the first embodiment, two oil holes 121 with the same arc length are formed in the boss 12 .

[0053] See Figure 2 In the second embodiment, three oil holes 121 are formed in the boss 12 , wherein two oil holes 121 with longer arc lengths are symmetrically distributed on both sides of the oil hole 121 with shorter arc length.

[0054] Moon rubbing Figure 3 In the third embodiment, four oil holes 121 are formed in the boss 12 , wherein two oil holes 121 with longer arc lengths are close to the middle of the boss 12 , and two oil holes 121 with shorter arc lengths are close to both sides of the boss 12 .

[0055] See Figure 4 In the fourth embodiment, five oil holes 121 are formed in the boss 12, including three oil holes 121 with shorter arc lengths and two oil holes 121 with longer arc lengths. The three oil holes 121 with shorter arc lengths and the two oil holes 121 with longer arc lengths are staggered along the circumference of the annular punch body 10.

[0056] See Figure 5 In the fifth embodiment, eight oil holes 121 are formed in the boss 12, including two oil holes 121 with shorter arc lengths and six oil holes 121 with longer arc lengths. The two oil holes 121 with shorter arc lengths are respectively close to both sides of the boss 12, and the six oil holes 121 with longer arc lengths are distributed between the two oil holes 121 with shorter arc lengths along the circumference of the annular punch body 10.

[0057] See Figure 6 In the sixth embodiment, thirteen oil holes 121 with the same arc length are formed in the boss, and the thirteen oil holes 121 are distributed at intervals along the circumference of the annular punch body 10.

[0058] It should be noted that the number of bosses 12 can be uniformly distributed in any number around the circumference of the annular sheet body 11. However, it should be noted that in two adjacent stator sheets 10, the angular spacing between the bosses 12 of one stator sheet 10 is staggered from the angular spacing between the bosses 12 of the other stator sheet 10. Taking into account characteristics such as avoiding extra-order noise and unbalanced magnetic pull, the number of bosses 12 is preferably a multiple of the number of motor poles.

[0059] Specifically, the number of the bosses 12 may be three, four, five, six, seven, eight, nine, ten, and so on.

[0060] Alternatively, for a 6-pole, 54-slot motor, the number of bosses 12 can be six, and the rotation angle (the first circumferential angle of deflection between two adjacent oil-inlet punches along the circumferential direction of the stator core 100) is 40 degrees. In this case, a single-stack torque fluctuation exhibits two larger fluctuations, which are offset by three stacks of 40-degree rotations (0, 40, and 80 degrees).

[0061] See also Figures 1 to 6 In one embodiment of the present invention, the oil hole 121 is an arc-shaped hole.

[0062] With this arrangement, the arc-shaped oil hole 121 is longer. When the stator punching sheet 10 is applied to the stator core 100 , it is easier to connect the oil hole 121 of one of the two adjacent stator punching sheets 10 with the concave area 13 of the other stator punching sheet 10 .

[0063] See also Figure 1 In one embodiment of the present invention, the oil hole 121 is extended along the circumference of the annular punching body 11, so that the oil hole 121 of the boss 12 can be longer. When the stator punching 10 is applied to the stator core 100, in two adjacent stator punchings 10, the two ends of the oil hole 121 of one stator punching can be connected to the oil hole 121 and the recessed area 13 of the other stator punching 10 respectively to form a circumferentially connected oil path.

[0064] See also Figure 1 In one embodiment of the present invention, the boss 12 is provided with at least two oil holes 121 , and the at least two oil holes 121 are distributed at intervals along the circumference of the annular punch body 11 .

[0065] Such a configuration not only ensures the strength of the boss 12 itself to prevent the oil hole 121 from being too large and affecting the strength of the boss 12, but also ensures a sufficiently large oil path by providing at least two oil holes 121 in the boss 12 to improve the heat dissipation effect.

[0066] In actual application, the sizes of the at least two oil holes 121 formed in the boss 12 may be the same or different.

[0067] See also Figure 1 、 Figure 2 In one embodiment of the present invention, a plurality of bosses 12 are distributed in an annular array along the center of the annular punch body 11 .

[0068] With such an arrangement, the plurality of bosses 12 can be evenly distributed on the outside of the annular punching body 11 , so as to form a uniform oil path on the outside of the annular punching, thereby improving the uniformity of heat dissipation of the motor.

[0069] See also Figures 7 to 11The present invention also proposes a stator core 100, which includes an oil inlet punching group 10a and a converging punching 20. The multiple oil inlet punchings and the converging punching 20 of the oil inlet punching group 10a are all stator punchings 10. The specific structure of the stator punching 10 refers to the above embodiment. Since the stator core 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0070] Among them, the oil inlet punching group 10a includes multiple stacked oil inlet punchings, and the adjacent two oil inlet punchings are deflected by a first circumferential angle along the circumference of the stator core 100; converging punchings 20 are provided on both sides of the oil inlet punching group 10a; in the two adjacent oil inlet punchings, the oil hole 121 of one oil inlet punching is connected to the concave area 13 of the other oil inlet punching; the bosses 12 of the multiple stator punchings 10 at least partially overlap in the axial direction of the stator core 100 to form a weld bead 50.

[0071] It is understood that by deflecting two adjacent oil-inlet punches by a first circumferential angle along the circumference of the stator core 100, the oil hole 121 of one oil-inlet punch can be connected to the recessed area 13 of the other oil-inlet punch in the two adjacent oil-inlet punches, thereby forming a circumferentially connected oil path. Because the arc length of the boss 12 is greater than the arc length of the recessed area 13, the bosses 12 of multiple stator punches 10 can be at least partially overlapped in the axial direction of the stator core 100 to form a weld bead 50, thereby maintaining the effectiveness of the welding. In addition, the stator punch 10 can also be used as a converging punch 20 to achieve the converging of cooling fluid through the oil hole 121 and recessed area 13 of the stator punch 10.

[0072] Specifically, the oil inlet punch group 10a may include two, three, four, five or other oil inlet punches.

[0073] In actual application, after the cooling fluid enters the oil inlet punching set 10a, it can directly enter the converging punching 20 for converging; or it can first pass through the oil channel punching 30 and then enter the converging punching 20 for converging.

[0074] See also Figure 7 、 Figure 10 In one embodiment of the present invention, the oil inlet punch group 10a includes at least three oil inlet punches. In this way, a sufficiently large oil inlet oil path can be formed through the oil holes 121 and the recessed area 13 of at least three oil inlet punches to achieve better heat dissipation effect.

[0075] See also Figures 7 to 9In one embodiment of the present invention, an oil channel punch 30 is provided between the oil inlet punch group 10a and the confluence punch 20, and the oil hole 121 and the recessed area 13 of the oil inlet punch are connected to the oil hole 121 and / or the recessed area 13 of the confluence punch 20 through the oil channel oil hole 31 of the oil channel punch 30.

[0076] In this way, an ordinary oil channel punch 30 can be set between the oil inlet punch group 10a and the confluence punch 20, so that after the cooling fluid enters the oil hole 121 and the recessed area 13 of the oil inlet punch, it flows to the oil hole 121 and / or recessed area 13 of the confluence punch 20 through the oil channel oil hole 31 of the oil channel punch 30, so that the cooling fluid can better flow to the oil hole 121 and recessed area 13 of the confluence punch 20 for oil collection.

[0077] In actual application, one oil channel punching plate 30 may be provided between the oil inlet punching plate group 10 a and the converging punching plate 20 , or at least two oil channel punching plates 30 may be provided.

[0078] See also Figure 7 、 Figure 10 In one embodiment of the present invention, an oil injection punch 40 is provided on the side of the converging punch 20 away from the oil inlet punch group 10a, and the oil injection hole 41 of the oil injection punch 40 is connected to the oil hole 121 and the concave area 13 of the converging punch 20.

[0079] With such arrangement, after the cooling fluid is converged by the converging punch 20 , it can finally be sprayed outward from the oil injection hole 41 of the oil injection punch 40 at the end, thereby achieving the effect of middle oil inlet and end converging spraying.

[0080] The present invention also provides a motor, which includes a housing, a stator and a rotor. The stator includes a stator core 100. The specific structure of the stator core 100 refers to the above embodiment. Since the present motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0081] The stator is arranged in the casing, and the stator further includes a stator winding, which is arranged in the stator core 100; the rotor is arranged in the stator.

[0082] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stator punching sheet, characterized in that: include: An annular punching body, wherein a plurality of stator slots are provided on the inner side of the annular punching body, and the plurality of stator slots are distributed at intervals along the circumference of the annular punching body; A plurality of bosses, the plurality of bosses being arranged on the outer side of the annular punch body and spaced apart along the circumference of the annular punch body, the bosses having oil holes formed therein, and a concave area being formed between two adjacent bosses; Wherein, in the circumferential direction of the annular punch body, the arc length of the boss is greater than the arc length of the concave area.

2. The stator sheet according to claim 1, characterized in that: The oil hole is an arc-shaped hole.

3. The stator sheet according to claim 2, characterized in that: The oil hole is extended along the circumference of the annular punch body.

4. The stator lamination according to any one of claims 1 to 3, characterized in that: The boss is provided with at least two oil holes, and the at least two oil holes are distributed at intervals along the circumference of the annular punch body.

5. The stator lamination according to any one of claims 1 to 3, characterized in that: The plurality of bosses are distributed in an annular array along the center of the annular punch body.

6. A stator core, characterized in that: include: An oil inlet punching plate group, wherein the oil inlet punching plate group comprises a plurality of stacked oil inlet punching plates, and adjacent two oil inlet punching plates are deflected by a first circumferential angle along the circumferential direction of the stator core; Converging punches, both sides of the oil inlet punch group are provided with the converging punches; Wherein, the oil inlet punch and the confluence punch are both stator punches according to any one of claims 1 to 5; In two adjacent oil inlet punches, the oil hole of one oil inlet punch is connected to the concave area of ​​the other oil inlet punch; the bosses of the plurality of stator punches at least partially overlap in the axial direction of the stator core to form a weld.

7. The stator core according to claim 6, wherein: The oil inlet punch group includes at least three oil inlet punches.

8. The stator core according to claim 6, wherein: An oil channel punch is provided between the oil inlet punch group and the confluence punch. The oil holes and recessed areas of the oil inlet punch are connected to the oil holes and / or recessed areas of the confluence punch through the oil channel holes of the oil channel punch.

9. The stator core according to claim 6, wherein: An oil spraying punch is provided on the side of the converging punch away from the oil inlet punch group, and the oil spraying hole of the oil spraying punch is connected with the oil hole and the concave area of ​​the converging punch.

10. A motor, characterized in that: include: chassis; a stator, the stator being disposed in the housing, the stator comprising a stator core and a stator winding according to any one of claims 6 to 9, the stator winding being disposed on the stator core; A rotor is arranged in the stator.

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