Stator punching sheet and motor

Abstract

The utility model belongs to the technical field of motor equipment, and particularly relates to a stator punching sheet, which comprises a stator punching sheet body, the stator punching sheet body comprises a yoke part outer surface and a yoke part inner surface, the yoke part inner surface is circular, and the yoke part outer surface is circular. A plurality of winding grooves which are arranged at equal intervals and point to the center of the stator punching sheet body are formed in the inner surface of the yoke part in a circumferential annular array mode, and each winding groove is of a rectangular open groove structure. The winding groove of the stator punching sheet is improved and designed into a rectangular open groove structure, and the groove shape is beneficial to wire embedding of a formed coil.

Description

Technical Field

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

[0002] The efficiency of a motor is generally determined by its stator and rotor. The stator is the stationary part of the motor and is mainly composed of stacked stator sheets with copper wire wound around them.

[0003] Currently, flat-wire motors for new energy vehicles are popular on the market. These motors utilize a semi-open slot structure, with the stator core inserted from one side and twisted at the other. This requires reliable equipment. The stator laminations of low-voltage three-phase asynchronous motors utilize pear-shaped slots, with narrow openings and a semicircular bottom. This slot configuration is suitable for inserting loose wire but not formed wire. Changing the coil structure to flat-wire requires adjusting the slot configuration. To address this, a stator lamination and motor were proposed. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a stator punching sheet and a motor to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A stator punching sheet includes a stator punching sheet body, wherein the stator punching sheet body includes a yoke outer surface and a yoke inner surface, wherein the yoke inner surface is circular and is provided with a plurality of winding grooves with equal spacing and pointing to the center of the stator punching sheet body along its circumferential annular array, wherein the winding grooves are rectangular open slot structures.

[0007] By adopting the above structural design, the winding slots of the stator punching sheet are improved and designed to be rectangular open slot structures. This slot type is conducive to the insertion of the formed coil.

[0008] Furthermore, the groove depth direction of the winding groove extends along the inner surface of the yoke toward the outer surface of the yoke, the groove depth of the winding groove is L, the side of the winding groove close to the inner surface of the yoke is open as a groove opening, and the side of the winding groove close to the outer surface of the yoke is closed as a groove tail, and the width of the groove tail is b.

[0009] Furthermore, a clamping groove for embedding the molding wire is provided near the groove opening of the winding groove toward the inner walls on both sides of the winding groove. The clamping groove is in a "<" shape, and the apex of the clamping groove is chamfered.

[0010] By adopting the above structural design, clamping grooves for embedding the formed wire are opened near the notch of the winding groove towards the inner walls on both sides of the winding groove, which is conducive to fixing the formed coil and preventing it from falling off.

[0011] Furthermore, the slot wedges of the winding slots are magnetic slot wedges.

[0012] Furthermore, the bottom corners of the groove tail are rounded.

[0013] Furthermore, the outer surface of the yoke is provided with a plurality of cleat slots in a circumferential annular array along its circumference, which are equally spaced and away from the center of the stator punching body.

[0014] Furthermore, the cleat groove is dovetail-shaped, and a positioning groove is provided on the bottom midline of the cleat groove.

[0015] A motor comprises the stator punching sheet, a casing and a stator core, wherein the stator core is installed in the casing.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The stator sheet comprises a stator sheet body, the stator sheet body comprising a yoke outer surface and a yoke inner surface, the yoke inner surface being circular and having a plurality of winding slots arranged in an annular array along its circumference and oriented toward the center of the stator sheet body at equal intervals, the winding slots being rectangular open slot structures. The stator sheet winding slots are improved to have a rectangular open slot structure, which facilitates the insertion of wires into the formed coils.

[0018] 2. A clamping groove for embedding the formed wire is opened near the notch of the winding groove towards the inner wall on both sides of the winding groove, which is conducive to fixing the formed coil and preventing it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a stator punching embodiment of the utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of a clip slot on a stator punching sheet of the utility model;

[0022] The reference numerals in the drawings of the specification include:

[0023] Stator punching sheet body (1), yoke outer surface (10), yoke inner surface (11), rotor hole (2), winding slot (3), slot opening (31), slot tail (32), clamping slot (33), clip slot (4), and positioning groove (41). DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0025] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0028] Example 1:

[0029] like Figure 1-3 As shown, the present invention provides a stator lamination, specifically, comprising a stator lamination body 1, the stator lamination body 1 comprising a yoke outer surface 10 and a yoke inner surface 11, the yoke inner surface 11 being circular and having a plurality of equally spaced winding slots 3 oriented toward the center of the stator lamination body 1 along its circumferential annular array, the winding slots 3 being rectangular open slot structures. There are 48 winding slots 3.

[0030] By adopting the above-mentioned structural design, the winding slot 3 of the stator punching sheet is improved and designed into a rectangular open slot structure. This slot type is conducive to the embedding of the formed coil, but it also brings new problems. The use of open slots will make the motor performance worse, such as increased loss and pulsation. In order to reduce this defect, the slot wedge of the slot mouth is replaced with a magnetic slot wedge. The use of magnetic slot wedges can reduce the influence of the slot on the air gap magnetic field, allowing the open slot to obtain the electromagnetic characteristics of a semi-open slot or a semi-closed slot.

[0031] The groove depth direction of the winding groove 3 extends along the inner surface 11 of the yoke toward the outer surface 10 of the yoke. The groove depth of the winding groove 3 is L. The side of the winding groove 3 close to the inner surface 11 of the yoke is opened as a groove opening 31, and the side of the winding groove 3 close to the outer surface 10 of the yoke is closed as a groove tail 32. The width of the groove tail 32 is b.

[0032] Near the notch 31 of the winding groove 3, there are clamping grooves 33 for embedding the molding wires toward the inner walls on both sides of the winding groove 3. The clamping grooves 33 are in a "<" shape, and the apex of the clamping grooves 33 is chamfered.

[0033] By adopting the above structural design, clamping grooves 33 for embedding the formed wire are opened near the notch 31 of the winding groove 3 toward the inner walls on both sides of the winding groove 3, which is conducive to fixing the formed coil and preventing it from falling off.

[0034] The bottom corner of the groove tail 32 is rounded.

[0035] The outer surface 10 of the yoke is provided with a plurality of cleat slots 4 in an annular array along its circumference, which are equally spaced and away from the center of the stator sheet body 1 .

[0036] The cleat slot 4 is dovetail-shaped, and a positioning groove 41 is provided on the midline of the bottom of the cleat slot 4. The positioning groove 41 is provided on the midline of the cleat slot 4 to facilitate the positioning of the welding gun, so that the welding gun can move in a straight line during the welding process. The dovetail shape of the cleat slot can prevent the solder from escaping the cleat slot, greatly enhancing the connection strength after welding.

[0037] A motor comprises a stator punching sheet, a casing and a stator core, wherein the stator core is installed in the casing.

[0038] The above are only embodiments of the present invention, and the circuits, electronic components and modules involved are all prior art, which can be fully implemented by those skilled in the art. It is needless to say that the content protected by this application does not involve improvements to software and methods. Common knowledge such as the specific structures and characteristics known in the scheme are not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all prior art in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme based on their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, several variations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A stator punching sheet, comprising a stator punching sheet body (1), wherein the stator punching sheet body (1) comprises a yoke outer surface (10) and a yoke inner surface (11), characterized in that: The inner surface (11) of the yoke is circular, and a plurality of winding slots (3) are provided along a circumferential annular array on the inner surface (11) of the yoke at equal intervals and pointing to the center of the stator punching body (1), and the winding slots (3) are rectangular open slot structures.

2. A stator lamination according to claim 1, characterized in that: The groove depth direction of the winding groove (3) is extending along the inner surface (11) of the yoke toward the outer surface (10) of the yoke, and the groove depth of the winding groove (3) is L. The side of the winding groove (3) close to the inner surface (11) of the yoke is open as a groove opening (31), and the side of the winding groove (3) close to the outer surface (10) of the yoke is closed as a groove tail (32), and the width of the groove tail (32) is b.

3. A stator lamination according to claim 2, characterized in that: A clamping groove (33) for inserting a molding wire is provided near the notch (31) of the winding groove (3) toward the inner walls on both sides of the winding groove (3). The clamping groove (33) is in a "<" shape, and the vertex of the clamping groove (33) is chamfered.

4. A stator lamination according to claim 3, characterized in that: The slot wedges of the winding slot (3) are magnetic slot wedges.

5. A stator lamination according to claim 2, characterized in that: The bottom corner of the groove tail (32) is rounded.

6. A stator lamination according to claim 1, characterized in that: The outer surface (10) of the yoke is provided with a plurality of cleat slots (4) along its circumferential annular array at equal intervals and facing away from the center of the stator punching body (1).

7. A stator lamination according to claim 6, characterized in that: The buckle slot (4) is dovetail-shaped, and a positioning groove (41) is provided on the bottom midline of the buckle slot (4).

8. A motor, characterized in that: The invention comprises the stator punching sheet according to any one of claims 1 to 7, and further comprises a casing and a stator core, wherein the stator core is installed in the casing.

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