X-pin stator hairpin structure

Abstract

The utility model relates to the field of machinery, and discloses an X-pin stator hairpin structure, a hairpin is additionally provided with a fracture gap, by using the hairpin, the cost does not need to be increased, a head twisting die is additionally manufactured, an axial pressing machine does not need to provide axial pressure during head twisting, and an X-pin head twisting form can be completed by using a conventional head twisting die. Meanwhile, the structure disclosed by the utility model also has the advantages of simplifying the stator assembly process, ensuring the welding quality and the like.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing flat wire stators for motors, in particular to an X-pin stator card issuing structure. Background Art

[0002] At present, with the development of hybrid technology for new energy vehicles, the requirements for the power density of new energy vehicle motors are getting higher and higher, and the requirements for the axial space of P3 structure motors are getting smaller and smaller. The main winding forms for sideline stators are: Haripin form, continuous wave winding form, flat wire concentrated winding form, and X-pin stator form. Among them, the X-pin stator form is introduced to better meet the axial space requirements. The current technical difficulties of this form are mainly in twisting and welding. When twisting, the length of the hairpin into the twisting die is 5-10㎜. When twisting, it is necessary to increase the axial pressure, and the qualified rate of twisting is low, and the bending radius close to the insulating paper side is large. Utility Model Content

[0003] The purpose of the utility model is to provide an X-pin stator card issuing structure to solve one or more of the above-mentioned prior art problems.

[0004] The utility model provides an X-pin stator hairpin structure, on which a breaking notch is arranged.

[0005] In some embodiments, the fracture notch includes a first notch and a second notch, and the hairpin includes an upper portion and a lower portion disposed on upper and lower sides of the fracture notch.

[0006] In some embodiments, the first notch and the second notch are both V-shaped.

[0007] In some embodiments, the inner end of the first notch and the inner end of the second notch are on the same plane.

[0008] In some embodiments, the parameters of the first gap conform to the following formula:

[0009] A1≥A5,

[0010] A5=arcsin(d+a) / (c+a),

[0011] A3 = 180° - A5,

[0012] Wherein, a is the width of the hairpin, b is the length of the inclined surface of the first notch, d is the vertical distance between the lower part of the hairpin and the lower part of the adjacent hairpin after the hairpin is twisted, c is the distance between the hairpins at the slot, A1 is the angle of the first notch before the hairpin is twisted, A3 is the angle between the inclined surface and the vertical surface at the first notch before the hairpin is twisted, and A5 is the inclination angle of the hairpin after the hairpin is twisted.

[0013] In some embodiments, b is greater than a to ensure welding quality.

[0014] In some embodiments,

[0015] The angle of the second notch before the hairpin is twisted is A2, and the value range of A2 is 60°-120°;

[0016] The depth of the second notch is L, and the value range of L is 0.1㎜-0.3㎜.

[0017] In some embodiments, A2 has a value range of 75°-105°;

[0018] The value range of L is 0.15㎜-0.25㎜.

[0019] In some embodiments, A2 is 90° and L is 0.2 mm.

[0020] In some embodiments,

[0021] The inclined surfaces on both sides of the inner end of the first notch are symmetrically distributed about the plane where the inner end of the first notch and the inner end of the second notch are located;

[0022] The inclined surfaces on both sides of the inner end of the second notch are symmetrically distributed with respect to the plane where the inner end of the first notch and the inner end of the second notch are located.

[0023] The advantages of the X-pin stator hairpin structure described in the utility model are:

[0024] A breaking notch is added to the traditional Haripin hairpin, which reduces the X-pin twisting process. The hairpin is broken by over-twisting while the stator is twisting, thereby achieving the X-pin form. There is no need to increase the cost and manufacture a special twisting die. There is no need for an axial press to provide axial pressure during twisting, and the twisting form is consistent with the traditional Hairpin hairpin stator. The X-pin twisting form can be completed directly using a conventional twisting die, with a high pass rate and simplified stator assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an X-pin stator hairpin structure in some embodiments of the present utility model;

[0026] Figure 2 Schematic diagram of the twisting process of the X-pin stator hairpin structure in some embodiments of the utility model;

[0027] Figure 3 Schematic diagram of the twisting process of the X-pin stator hairpin structure in other embodiments of the present invention. DETAILED DESCRIPTION

[0028] Combination Figures 1 to 3 As shown in the content, the utility model discloses an X-pin stator hairpin structure, a fracture notch is provided on the hairpin, the fracture notch includes a first notch 301 and a second notch 302, and the hairpin includes an upper part 1 and a lower part 2 arranged on the upper and lower sides of the fracture notch.

[0029] The first notch 301 and the second notch 302 are both V-shaped.

[0030] The inner end of the first notch 301 and the inner end of the second notch 302 are on the same plane.

[0031] The parameters of the first gap 301 conform to the following formula:

[0032] A1≥A5,

[0033] A5=arcsin(d+a) / (c+a),

[0034] A3 = 180° - A5,

[0035] Where a is the width of the hairpin, b is the length of the inclined surface of the first notch 301, b is greater than a to ensure welding quality, d is the vertical distance between the lower part of the hairpin and the lower part of the adjacent hairpin after the hairpin is twisted, c is the distance between the hairpins at the notch for fixing the hairpins, A1 is the angle of the first notch 301 before the hairpin is twisted, A3 is the angle between the inclined surface and the vertical surface at the first notch 301 before the hairpin is twisted, and A5 is the tilt angle of the hairpin after the hairpin is twisted. The process of assembling the hairpin twisting head can be as follows Figure 2 and Figure 3 shown.

[0036] The angle of the second notch 302 before the hairpin is twisted is A2, and the value range of A2 is 60°-120°, preferably 75°-105°; the depth of the second notch 302 is L, and the value range of L is 0.1㎜-0.3㎜, preferably 0.15㎜-0.25㎜.

[0037] In some specific embodiments, A2 may be 90° and L may be 0.2 mm.

[0038] In some specific embodiments,

[0039] The inclined surfaces on both sides of the inner end of the first notch 301 are symmetrically distributed with respect to the plane where the inner end of the first notch 301 and the inner end of the second notch 302 are located;

[0040] The inclined surfaces on both sides of the inner end of the second notch 302 are symmetrically distributed with respect to the plane where the inner end of the first notch 301 and the inner end of the second notch 302 are located.

[0041] The above undisclosed matters can be directly implemented by using existing technologies, so they will not be elaborated here.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several similar modifications and improvements without departing from the inventive concept of the present invention, and these should also be regarded as within the protection scope of the present invention.

Claims

1. An X-pin stator card issuing structure, It is characterized in that A breaking notch is arranged on the hairpin, and the breaking notch includes a first notch and a second notch. The hairpin includes an upper part and a lower part arranged on upper and lower sides of the breaking notch.

2. An X-pin stator hairpin structure according to claim 1, It is characterized in that The first notch and the second notch are both V-shaped.

3. An X-pin stator hairpin structure according to claim 2, It is characterized in that The inner end of the first notch and the inner end of the second notch are on the same plane.

4. An X-pin stator hairpin structure according to claim 1 or 2, It is characterized in that The parameters of the first gap conform to the following formula: A1≥A5, A5=arcsin(d+a) / (c+a), A3=180°-A5, Wherein a is the width of the hairpin, b is the length of the inclined surface of the first notch, d is the vertical distance between the lower part of the hairpin and the lower part of the adjacent hairpin after the hairpin is twisted, c is the distance between the hairpins at the notch, A1 is the angle of the first notch before the hairpin is twisted, A3 is the angle between the inclined surface and the vertical surface at the first notch before the hairpin is twisted, and A5 is the inclination angle of the hairpin after the hairpin is twisted.

5. An X-pin stator hairpin structure according to claim 4, It is characterized in that b is greater than a.

6. An X-pin stator hairpin structure according to claim 1 or 2, It is characterized in that The included angle of the second notch before the hairpin is twisted is A2, and the value range of A2 is 60°-120°; The depth of the second notch is L, and the value range of L is 0.1 mm-0.3 mm.

7. An X-pin stator hairpin structure according to claim 6, It is characterized in that The value range of A2 is 75°-105°; The value range of L is 0.15㎜-0.25㎜.

8. An X-pin stator hairpin structure according to claim 7, It is characterized in that A2 is 90° and L is 0.2㎜.

9. The X-pin stator hairpin structure according to claim 2, It is characterized in that The inclined surfaces on both sides of the inner end of the first notch are symmetrically distributed about the plane where the inner end of the first notch and the inner end of the second notch are located; The inclined surfaces on both sides of the inner end of the second notch are symmetrically distributed with respect to the plane where the inner end of the first notch and the inner end of the second notch are located.

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