Motor stator punching sheet and motor

Abstract

The utility model discloses a motor stator punching sheet and a motor, and relates to the technical field of motor manufacture, the motor stator punching sheet comprises a stator punching sheet body of an annular structure, a plurality of stator coil grooves are uniformly distributed around the center of the inner ring surface of the stator punching sheet body, a plurality of cramp grooves are uniformly distributed on the outer circumferential surface of the stator punching sheet body, and the cramp grooves are arranged in the stator punching sheet body. The stator punching sheet body is provided with a plurality of buckling sheet grooves, a wire passing sheet arranging groove is arranged between two buckling sheet grooves, the wire passing sheet arranging groove is used for positioning during stator punching sheet arrangement and wire passing of an end wire of a stator winding, the stator punching sheet body is further provided with a wire passing hole, and the wire passing hole is used for being matched with the wire passing sheet arranging groove for wire passing of the end wire of the stator winding. According to the arrangement, the slotting area of the outer circumference of the stator punching sheet body is reduced, so that the contact area of the stator surface and a casing is increased, the heat exchange efficiency of an iron core and the casing is improved, and the temperature rise of a motor winding is reduced; meanwhile, the influence of slotting on a stator magnetic field is reduced, the saturation degree of a motor yoke part is reduced, and the efficiency of the motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor manufacturing technical field, especially a kind of motor stator punching sheet and motor. BACKGROUND

[0002] For asynchronous motor or permanent magnet motor, stator core outer circle and shell inner circle are connected together by interference or transition fit, in order to facilitate piece and accessory device wiring, there will be buckle piece groove 02, piece groove 03 and wire passing groove 04 on the outer circle of stator punching sheet 01, as shown in the drawings, wherein wire passing groove 04 is only used to guide PT100 (i.e. thermal resistance) lead wire embedded in one end to the other end, so that cable enters into main terminal box or auxiliary terminal box. Wire passing groove 04 is usually symmetrical on both sides, which facilitates the pressing angle of the core and does not have a great impact on wire passing. Piece groove 03 is to facilitate the automatic piece process in the punching sheet production process, and it is required that it is the deepest in all grooves on the outer circle to prevent piece error. The defects of the existing scheme are that the punching sheet surface is grooved more, which affects the heat dissipation area of the motor, and too many grooves have an impact on the electrical performance of the motor, such as large no-load current and low efficiency. Figure 1 Therefore, how to provide a motor stator punching sheet to at least partially solve the above-mentioned drawbacks is a technical problem that needs to be solved by those skilled in the art at present.

[0003] UTILITY MODEL CONTENT The utility model aims at providing a motor stator punching sheet, which can reduce the grooving on the surface of the punching sheet.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A motor stator punching sheet comprises:

[0006] A motor stator punching sheet comprises:

[0007] The stator punching sheet body has a ring structure, and the inner ring surface of the stator punching sheet body is uniformly distributed with a plurality of stator coil grooves around the center thereof. The outer peripheral surface of the stator punching sheet body is uniformly distributed with a plurality of buckle piece grooves, and a wire passing piece groove is arranged between two of the buckle piece grooves. The wire passing piece groove is used for positioning during the arrangement of the stator punching sheet and for the end lead wire passing of the stator winding. A wire passing hole is further arranged on the stator punching sheet body, which is used for wire passing of the end lead wire of the stator winding in cooperation with the wire passing piece groove.

[0008] Preferably, the cross-sectional shape of the wire passing piece groove is trapezoidal, and the opening size of the wire passing piece groove gradually expands in the direction away from the center of the stator punching sheet body.

[0009] Preferably, the wire passing piece groove is provided with a fillet at an angle close to the center of the stator punching sheet body.

[0010] Preferably, the buckle slot is dovetail slot shaped, with a width ranging from 14 to 20 mm and a thickness ranging from 2 to 4 mm.

[0011] Preferably, the wire passing and sheet arranging slot has a thickness greater than 7 mm along the radial direction of the stator sheet body.

[0012] Preferably, the wire passing hole is square in cross section, with rounded corners.

[0013] Preferably, the wire passing hole is disposed on the side facing away from the wire passing and sheet arranging slot.

[0014] Preferably, two wire passing holes are included, and the two wire passing holes and the wire passing and sheet arranging slot are uniformly distributed along the circumferential direction of the stator sheet body.

[0015] Preferably, the stator coil slot is pear-shaped.

[0016] A motor including the stator sheet described above.

[0017] With respect to the background art described above, the motor stator sheet provided by the present application includes a stator sheet body in the form of a ring structure, the inner ring surface of the stator sheet body is uniformly provided with a plurality of stator coil slots about the center thereof, the outer circumferential surface of the stator sheet body is uniformly provided with a plurality of buckle slots, and a wire passing and sheet arranging slot is disposed between two of the buckle slots, the wire passing and sheet arranging slot is used for positioning during stator sheet arrangement and for passing the end wires of the stator winding, and a wire passing hole is further provided on the stator sheet body, the wire passing hole is used for passing the end wires of the stator winding in cooperation with the wire passing and sheet arranging slot.

[0018] In the present embodiment, the sheet arranging slot and the wire passing slot in the prior art are combined into the wire passing and sheet arranging slot in the present embodiment, which reduces the slotting area of the outer circumference of the stator sheet body, thereby increasing the contact area of the stator surface with the housing, improving the heat exchange efficiency of the core and the housing, and reducing the temperature rise of the motor winding; at the same time, under the premise of ensuring the same area of the wire passing slot, the height of the wire passing slot can be reduced, and the sheet arranging slot is combined, thereby reducing the influence of slotting on the magnetic field of the stator and reducing the saturation degree of the yoke of the motor, thereby improving the efficiency of the motor; in addition, by providing the wire passing and sheet arranging slot, the appearance of the stator is also improved, and it can be directly observed from the outside whether the core is aligned or not, thereby facilitating inspection. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described in the following are only a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0020] Figure 1 It is a schematic diagram of the stator lamination structure in the prior art.

[0021] Figure 2 It is a schematic diagram of the stator lamination structure provided by the embodiment of the present application.

[0022] Figure 3 It is Figure 2 It is a schematic diagram of the stator structure composed of the stator lamination.

[0023] Figure 4 It is another embodiment of the stator lamination.

[0024] Figure 5 It is Figure 4 It is a schematic diagram of the stator structure composed of the stator lamination.

[0025] Among them:

[0026] 01-stator lamination, 02-buckle piece groove, 03-ri piece groove, 04-wire groove;

[0027] 100-stator lamination body, 110-stator coil groove, 120-buckle piece groove, 130-wire-ri piece groove, 140-wire hole. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the present application will be described clearly and completely below by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] In order to make those skilled in the art better understand the technical scheme of the present application, the present application will be further described in detail below by combining the drawings and specific embodiments.

[0030] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left" and "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, constitute and operate in a specific orientation, and therefore cannot be understood as a limitation of the utility model.

[0031] The utility model aims at providing a motor stator punching sheet, can reduce the surface slotting of punching sheet.

[0032] In order to achieve the above object, the utility model provides the following technical scheme.

[0033] Please refer to Figures 2 to 5 The utility model provides a motor stator punching sheet, including: the annular structure of stator punching sheet body 100, the inner ring surface of stator punching sheet body 100 is evenly distributed with several stator coil slots 110 around the center, and the outer circumferential surface of stator punching sheet body 100 is evenly distributed with several buckle piece slots 120, and the through wire piece slot 130 for positioning when stator punching sheet arrangement and for the end lead wire of stator winding is arranged between two buckle piece slots 120, and the through wire hole 140 for the end lead wire of stator winding is arranged on stator punching sheet body 100 and is used for cooperating with the through wire piece slot 130.

[0034] In the embodiment, the stator punching sheet body 100 is annular sheet structure, and the innermost circle of the circumference is evenly provided with several stator coil slots 110, and every two stator coil slots 110 is T-shaped tooth, that is, winding column, and the coil can be neatly wound on the T-shaped tooth, and since the stator coil slot 110 exists, the cross contact of the coil can be avoided to cause the temperature rise of motor to increase, and further, the T-shaped tooth includes T-shaped tooth vertical beam and T-shaped tooth horizontal beam, the upper end of the T-shaped tooth vertical beam is wide, and the lower end is narrow, the structure can increase the width of the T-shaped tooth, reduce the magnetic density of stator tooth, make the magnetic field distribution more uniform, the motor working efficiency is higher, and the electromechanical energy conversion is guaranteed, the loss of motor is reduced, and the efficiency of motor is improved.

[0035] The stator punching sheet provided in the embodiment can be composed into motor stator, in order to facilitate the connection of several pieces of stator punching sheet, several buckle piece slots 120 are arranged on the outermost circle of the circumference of stator punching sheet body 100, and buckle piece can be installed in the buckle piece slot 120 to fix the stator punching sheet into the iron core.

[0036] It should be noted that the overline and sheet arranging groove 130 is arranged at the position between two buckle grooves 120, which has the functions of the overline groove and the sheet arranging groove in the prior art, that is, after the punching sheet is punched out, the overline and sheet arranging groove 130 can automatically arrange the punching sheet to be consistent, and then the overline and sheet arranging groove 130 and the overline hole 140 arranged on the opposite side thereof cooperate to facilitate the wiring and cabling of the PT100 temperature measuring wire and the heating belt lead wire inside the motor; the overline hole 140 is arranged on the plate body of the stator punching sheet body 100 and is not arranged on the edge like the overline and sheet arranging groove 130, and its function is only to facilitate the wiring.

[0037] Since the sheet arranging groove and the overline groove in the prior art are combined into the overline and sheet arranging groove 130 in the embodiment, the outer circumference of the stator punching sheet body 100 is reduced in the slotting area, so that the contact area of the stator surface with the shell is increased, the heat exchange efficiency of the core and the shell is improved, and the temperature rise of the motor winding is reduced; at the same time, under the premise of ensuring the same area of the overline groove, the height of the overline groove can be reduced, and the sheet arranging groove is combined, the influence of slotting on the magnetic field of the stator is reduced, the saturation degree of the motor yoke is reduced, and the efficiency of the motor is improved; in addition, by arranging the overline and sheet arranging groove 130, the appearance of the stator is also improved, and it can be directly observed from the outside whether the core is aligned or not, which is convenient for inspection.

[0038] Preferably, the overline and sheet arranging groove 130 is trapezoidal in cross-sectional shape, and the opening size of the overline and sheet arranging groove 130 gradually expands in the direction away from the center of the stator punching sheet body 100.

[0039] As shown in detail in Figures 2 to 5 The overline and sheet arranging groove 130 is approximately trapezoidal in structure, which can reduce the height of the groove, that is, the depth of the overline and sheet arranging groove 130, compared with the circular arc structure in the prior art under the premise of ensuring the same area of the groove cross section, and since the overline and sheet arranging groove 130 combines the sheet arranging groove in the prior art, the influence of slotting on the magnetic field of the stator is reduced, the saturation degree of the motor yoke is reduced, and the efficiency of the motor is improved.

[0040] Preferably, the corner of the overline and sheet arranging groove 130 close to the center of the stator punching sheet body 100 is provided with a round corner.

[0041] Further, in order to prevent the overline and sheet arranging groove 130 from being too sharp at the corner and scratching the lead wire when arranging the lead wire inside the motor, the corner position of the overline and sheet arranging groove 130 is provided with a round corner, and the size of the round corner can be selected according to the actual situation.

[0042] Preferably, the buckle groove 120 is in the shape of a dovetail groove, with a width ranging from 14 to 20 mm and a thickness ranging from 2 to 4 mm.

[0043] In the embodiment, the shape of the clamping slot 120 is preferably dovetail slot shape, namely, the shape of the inverted trapezoidal structure, that is, the width gradually decreases in the direction away from the center of the circle, and the shape is just opposite to that of the wire passing and sorting slot 130, but since the clamping slot 120 needs to clamp the clamping piece, no fillet or chamfer is arranged in the clamping slot 120.

[0044] Preferably, the thickness of the wire passing and sorting slot 130 along the radial direction of the stator punching piece body 100 is greater than 7 mm.

[0045] In the embodiment, the thickness of the wire passing and sorting slot 130 in the direction towards the center of the stator punching piece body 100 is preferably 7 mm. Of course, the thickness can also be selected according to actual conditions.

[0046] Preferably, the cross section of the wire passing hole 140 is square, and the corners are all provided with fillets.

[0047] In the embodiment, the wire passing hole 140 is arranged to facilitate the wiring and wiring of the internal temperature measuring wire and heating belt lead wire of the motor, and at the same time, the wire passing hole 140 arranged on the plate body of the stator punching piece body 100 can also be used for heat dissipation after the stator punching piece forms a stator core. The heat can be discharged to both ends along the wire passing hole 140; the wire passing hole 140 is not arranged at the edge of the stator punching piece body 100 as in the prior art, which can also reduce the slotting area of the stator punching piece, thereby increasing the contact area of the stator punching piece and the shell, and improving the heat exchange efficiency of the core and the shell.

[0048] It can be understood that the wire passing hole 140 in the embodiment is preferably square structure, but other shapes can also be selected according to actual conditions, which are not limited herein.

[0049] In addition, in order to prevent the edge corners of the wire passing hole 140 from scratching the passing lead wire, the corners are all provided with fillet structure.

[0050] Preferably, the wire passing hole 140 is arranged on the side away from the wire passing and sorting slot 130.

[0051] In one embodiment, only one wire passing hole 140 is arranged, and the wire passing hole 140 is arranged on the side opposite to the wire passing and sorting slot 130, and the two are not symmetrical. The wire passing hole 140 is arranged at the position close to the edge of the stator punching piece body 100, and the specific arrangement is shown in Figure 2 and Figure 3 .

[0052] Preferably, two wire passing holes 140 are included, and the two wire passing holes 140 and the wire passing and sorting slot 130 are uniformly distributed along the circumferential direction of the stator punching piece body 100.

[0053] In another embodiment, two wire passing holes 140 are arranged on the stator lamination body 100, and the included angle between the two wire passing holes 140 and the line connecting the wire passing lamination groove 130 and the center of the circle is 60 degrees, as shown in Figure 4 and Figure 5 .

[0054] Preferably, the stator coil groove 110 is a pear-shaped groove.

[0055] In the present embodiment, the stator coil groove 110 can be installed with a spread wire winding, a flat copper wire winding or a hairpin winding, and the stator coil groove 110 can also be a pear-shaped groove and its variant groove shape, a rectangular groove, which is not limited here.

[0056] The present application also provides an electric machine comprising the electric machine stator composed of the electric machine stator lamination described above.

[0057] In summary, the present application provides an electric machine stator lamination, which combines the wire passing groove and the lamination groove in the prior art, and arranges the wire passing groove at the edge of the stator lamination in the plate body, thereby reducing the slotting area of the stator lamination. When the stator lamination is assembled into an electric machine stator, the contact area of the outer periphery with the machine shell is increased, which can improve the heat exchange efficiency of the stator core and the machine shell, and reduce the temperature rise of the electric machine winding. At the same time, the present application also improves the cross-sectional shape of the wire passing lamination groove 130, which reduces the wire passing height, i.e. the depth of the wire passing lamination groove 130, while ensuring the wire passing area. Since the wire passing lamination groove 130 also has the function of the lamination groove, it does not need to be additionally arranged, thereby reducing the influence of slotting on the magnetic field of the stator, reducing the saturation degree of the yoke of the electric machine, and improving the efficiency of the electric machine. Moreover, since the wire passing lamination groove 130 also has the function of wire passing, its area will be greater than that of the lamination groove used only for lamination, which is convenient for the staff to intuitively judge whether the core is aligned or not, and facilitates inspection.

[0058] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any actual relationship or order between the entities.

[0059] The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be mutually referred to.

[0060] The above has carried out the detailed introduction to the embodiment provided by the utility model. The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment is only used for helping to understand the method and core idea of the utility model. It should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the utility model.

Claims

1. An electrical machine stator lamination, characterized in that, The application relates to a motor stator lamination sheet. The inner ring surface of the stator lamination sheet body (100) is uniformly distributed with a plurality of stator coil grooves (110) around the center thereof, the outer peripheral surface of the stator lamination sheet body (100) is uniformly distributed with a plurality of buckle grooves (120), and a wire passing and arranging groove (130) is arranged between two of the buckle grooves (120), the wire passing and arranging groove (130) is used for positioning of the stator lamination sheet during arrangement and for wire passing of the end part of the stator winding, and a wire passing hole (140) is further arranged on the stator lamination sheet body (100), the wire passing hole (140) is used for wire passing of the end part of the stator winding in cooperation with the wire passing and arranging groove (130).

2. The motor stator lamination of claim 1, wherein, The wire passing and arranging groove (130) is in trapezoidal shape in cross section, and the wire passing and arranging groove (130) is gradually expanded in size in the direction away from the center of the stator lamination sheet body (100).

3. The motor stator lamination of claim 2, wherein, The wire passing and arranging groove (130) is provided with a round corner near the center of the stator lamination sheet body (100).

4. The motor stator lamination of claim 1, wherein, The buckle groove (120) is in dovetail groove shape, the width range is 14-20 mm, and the thickness range is 2-4 mm.

5. The motor stator lamination of claim 3, wherein, The thickness of the wire passing and arranging groove (130) along the radial direction of the stator lamination sheet body (100) is greater than 7 mm.

6. The motor stator lamination of claim 1, wherein, The wire passing hole (140) is in square shape in cross section, and the corners are all provided with round corners.

7. The motor stator lamination of claim 6, wherein, The wire passing hole (140) is arranged on the side away from the wire passing and arranging groove (130).

8. The motor stator lamination of claim 6, wherein, Two wire passing holes (140) are arranged, and the two wire passing holes (140) and the wire passing and arranging groove (130) are uniformly distributed along the circumferential direction of the stator lamination sheet body (100).

9. The motor stator lamination of claim 1, wherein, The stator coil groove (110) is in pear-shaped groove.

10. An electric machine characterized by The application further relates to a motor stator lamination sheet comprising any one of the stator lamination sheets according to claims 1-9.

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