Improved structure of insulating framework

Abstract

The utility model discloses an improved structure of an insulating framework, which comprises a first framework and a second framework which are arranged at a tooth part of a stator core, the first framework and the second framework are both U-shaped, and two end parts of an opening of the first framework are respectively provided with a first gap and a second gap. A third notch and a fourth notch are formed in the two ends of the two openings of the second framework respectively, the first notch and the third notch are mutually embedded, the second notch and the fourth notch are mutually embedded and matched, so that the ends of the first framework and the second framework abut against each other, and the side faces of the corresponding ends are in smooth transition. The connecting seams of the first framework and the second framework are not in the same plane internally and externally, the insulating property is good, and the potential safety hazard of discharging of the coil and the iron core is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of traction machines, in particular to an improved structure of an insulating frame for a stator of a traction machine motor. Background Art

[0002] The existing stator consists of a stator core, slot wedges, slot insulation, coils, and interlayer insulation. However, this structure has the following disadvantages:

[0003] (1) It is suitable for manual wire embedding process, which requires high skills of operators, long working hours and high labor costs;

[0004] (2) Use insulating paper to insulate the slot and repeat the operation;

[0005] (3) The slot insulation uses slot wedges or slot cover paper (insulating material), which requires special tools to operate and is complicated. Utility Model Content

[0006] The utility model aims to provide an improved insulating frame structure suitable for automatic wire embedding.

[0007] The purpose of the utility model is achieved in this way.

[0008] An improved insulating skeleton structure includes a first skeleton and a second skeleton arranged at a tooth portion of a stator core, the first skeleton and the second skeleton are both U-shaped, the first skeleton has a first notch and a second notch at both ends of an opening, and the second skeleton has a third notch and a fourth notch at both ends of the opening, the first notch and the third notch are mutually embedded, and the second notch and the fourth notch are mutually embedded to cooperate so that the ends of the first skeleton and the second skeleton are butted against or close to each other, and the sides of the corresponding ends are smoothly transitioned. The connection seams of the first skeleton and the second skeleton are not in the same plane inside and outside, and the insulation performance is good, that is, the potential safety hazard of discharge between the coil and the core is avoided.

[0009] The above technical solution can be further improved as follows.

[0010] In a more specific solution, the first notch and the second notch are formed by the side depression of the first frame end, and the third notch and the fourth notch are formed by the side depression of the second frame end. The first notch, the second notch, the third notch and the fourth notch are easy to form.

[0011] In a more specific solution, the first notch and the second notch are asymmetrically arranged at the two ends of the first frame, and the corresponding third notch and the fourth notch are asymmetrically arranged at the two ends of the second frame. The overall structure is reasonable after the first frame and the second frame are plugged together.

[0012] In a more specific solution, the first frame opening forms a first end and a second end respectively, the first notch is formed by the concave shape of the outer side surface of the first end, the second notch is formed by the concave shape of the inner side surface of the second end, the third end and the fourth end are formed by the concave shape of the inner side surface of the third end respectively at the opening of the second frame, the third notch is formed by the concave shape of the inner side surface of the third end, and the fourth notch is formed by the concave shape of the outer side surface of the fourth end. After the first frame and the second frame are plugged together, the joint is not easy to bulge, and the gap is small, thereby improving the insulation performance.

[0013] In a more specific solution, the first skeleton includes an integrally formed first substrate, a first upper side plate and a first lower side plate, the first substrate, the first upper side plate and the first lower side plate surround the first coil slot on the upper and lower sides of the first substrate, the first notch and the second notch are both extended from the first substrate to the first upper side plate and the first lower side plate, the second skeleton includes an integrally formed second substrate, a second upper side plate and a second lower side plate, the second substrate, the second upper side plate and the second lower side plate surround the second coil slot on the upper and lower sides of the second substrate, the third notch and the fourth notch are both extended from the second substrate to the second upper side plate and the second lower side plate, after the first skeleton and the second skeleton are butted, there is a smooth transition between the first and second substrates, the first and second upper side plates, the first and second lower side plates. The coil is evenly wound in the first and second coil slots, and the insulating skeleton is evenly stressed.

[0014] In a more specific solution, the first end and the second end of the first upper side plate are respectively provided with a first flange adapted to the slot-shaped upper shape of the stator core, the third end and the fourth end of the second upper side plate are respectively provided with a second flange adapted to the slot-shaped upper shape of the stator core, the first notch and the second notch extend to the first flange, the third notch and the fourth notch extend to the second flange, and the first flange and the second flange end portions abut and smoothly transition. The stator core slot insulation is improved.

[0015] In a more specific solution, the first upper side plate and the first lower side plate are respectively provided with first reinforcing ribs at the connection with the first substrate, and the second upper side plate and the second lower side plate are respectively provided with second reinforcing ribs at the connection with the second substrate, and after the first frame and the second frame are abutted, the end faces of the first reinforcing ribs and the second reinforcing ribs abut. The first reinforcing ribs and the second reinforcing ribs improve the structural strength of the insulating frame.

[0016] In a more specific solution, the first lower side plate is provided with a first convex edge on the side corresponding to the first end, the bottom surface of the first convex edge is flush with the bottom surface of the first lower side plate, one end of the first convex edge extends to the first notch, the first lower side plate is provided with a second convex edge on the side corresponding to the second end, the bottom surface of the second convex edge is higher than or flush with the top surface of the first convex edge, one end of the second convex edge extends to the second notch, the second lower side plate is provided with a third convex edge on the side corresponding to the third end, the third convex edge is at the same horizontal position as the second convex edge, and the third convex edge extends to the third notch, the second lower side plate is provided with a fourth convex edge on the side corresponding to the fourth end, the fourth convex edge is at the same horizontal position as the first convex edge, and the fourth convex edge extends to the fourth notch, and when the first frame and the second frame are abutted, there is a gap between the first convex edge and the third convex edge, and between the second convex edge and the fourth convex edge. The gap facilitates the separation of the first frame and the second frame.

[0017] In a more specific solution, an opening is provided at the second lower side plate away from the first frame. The bridge wires and connecting cables of the coil winding are tied to the ends of the stator core of the winding with a tie passing through the opening.

[0018] In a more specific solution, after the first frame and the second frame are connected, the planes of the outer sides of the two frames and the arc-shaped reinforcing ribs at the corners of the planes are smoothly transitioned, and the inner sides of the two frames are provided with concave surfaces to increase the contact area.

[0019] The beneficial effects of the utility model are as follows.

[0020] The connection seam between the first frame and the second frame is not in the same plane inside and outside, and the insulation performance is good, that is, the potential safety hazard of discharge between the coil and the iron core is avoided. The first notch, the second notch, the third notch and the fourth notch are easy to form. After the first frame and the second frame are plugged in, the overall structure is reasonable, the joint is not easy to bulge, and the gap is small, which improves the insulation performance. The coil is evenly wound in the first coil slot and the second coil slot, and the insulation frame is evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of embodiment 1.

[0022] Figure 2 This is a schematic diagram of the decomposed structure of Example 1 (top view).

[0023] Figure 3 This is a schematic diagram of the decomposed structure in Example 1 (bottom view).

[0024] Figure 4 Schematic diagram of the structure of the first skeleton in Example 1 (bottom view).

[0025] Figure 5 Schematic diagram of the structure of the first skeleton in Example 1 (top view). DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1, see Figure 1-5 As shown, an improved insulating frame structure includes a first frame 1 and a second frame 2, both of which are U-shaped. The first frame 1 has a first notch 30 and a second notch 40 at both ends of the opening, and the second frame 2 has a third notch 50 and a fourth notch 60 at both ends of the opening.

[0028] In this embodiment, the first notch 30 and the second notch 40 are formed by the side depression of the end of the first skeleton 1, and the first notch 30 and the second notch 40 are asymmetrically arranged at the positions of the two ends of the first skeleton 1. Specifically, the first end 3 and the second end 4 are formed at the opening of the first skeleton 1, respectively, the first notch 30 is formed by the outer side of the first end 3, and the second notch 40 is formed by the inner side of the second end 4. Among them, the first skeleton 1 includes an integrally formed first substrate 10, a first upper side plate 11 and a first lower side plate 12, the first substrate 10, the first upper side plate 11 and the first lower side plate 12 surround the first coil slot 13 on the upper and lower sides of the first substrate 10, and the first notch 30 and the second notch 40 are extended from the first substrate 10 to the first upper side plate 11 and the first lower side plate 12 on both sides. The first reinforcing ribs 14 are respectively provided at the connection between the first upper side plate 11 and the first lower side plate 12 and the first substrate 10. The first lower side plate 12 is provided with a first flange 31 on the side corresponding to the first end 3, the bottom surface of the first flange 31 is flush with the bottom surface of the first lower side plate 12, and one end of the first flange 31 extends to the first notch 30, and the first lower side plate 12 is provided with a second flange 41 on the side corresponding to the second end 4, the bottom surface of the second flange 41 is higher than or flush with the top surface of the first flange 31, and one end of the second flange 41 extends to the second notch 40.

[0029] The third notch 50 and the fourth notch 60 are formed by the concave side of the end of the second skeleton 2, and the corresponding third notch 50 and fourth notch 60 are asymmetrically arranged at the positions of the two ends of the second skeleton 2. Specifically, the third end 5 and the fourth end 6 are formed at the opening of the second skeleton 2, respectively, the third notch 50 is formed by the inner side of the third end 5, and the fourth notch 60 is formed by the outer side of the fourth end 6. Among them, the second skeleton 2 includes an integrally formed second substrate 20, a second upper side plate 21 and a second lower side plate 22, the second substrate 20, the second upper side plate 21 and the second lower side plate 22 surround the second coil slot 23 on the upper and lower sides of the second substrate 20, the third notch 50 and the fourth notch 60 are extended from the second substrate 20 to the second upper side plate 21 and the second lower side plate 22 on both sides, and the second upper side plate 21 and the second lower side plate 22 are connected to the second substrate 20 with second reinforcing ribs 24 respectively. The second lower side plate 22 is provided with a third flange 51 on the side corresponding to the third end 5, the third flange 51 is at the same horizontal position as the second flange 41, and one end of the third flange 51 extends to the third notch 50. The second lower side plate 22 is provided with a fourth flange 61 on the side corresponding to the fourth end 6, the fourth flange 61 is at the same horizontal position as the first flange 31, and one end of the fourth flange 61 extends to the fourth notch 60. The second lower side plate 22 is provided with an opening 26 away from the first frame 1. The first reinforcing rib 14 and the second reinforcing rib 24 are rounded in cross section.

[0030] The first skeleton 1 and the second skeleton 2 are respectively inserted into the stator core slots from the axial direction of the stator core, that is, the first notch 30 and the third notch 50 are inlaid with each other, and the second notch 40 and the fourth notch 60 are inlaid with each other to make the ends of the first skeleton 1 and the second skeleton 2 butt against each other, so that the first skeleton 1 and the second skeleton 2 wrap the stator core teeth. The side surfaces of the corresponding ends of the first skeleton 1 and the second skeleton 2 are smoothly transitioned, and the smooth transition means that the corresponding two surfaces are on the same plane. Specifically, there is a smooth transition between the first substrate 10 and the second substrate 20, the first upper side plate 11 and the second upper side plate 21, and the first lower side plate 12 and the second lower side plate 22, and the end faces of the first reinforcing rib 14 and the second reinforcing rib 24 are butted against each other. There is a gap 7 between the first flange 31 and the third flange 51, and between the second flange 41 and the fourth flange 61. The second notch 40 and the third notch 50 constitute the concave surface.

[0031] The first end 3 and the second end 4 on the first upper side plate 11 are respectively provided with a first flange 15 adapted to the slot-shaped upper shape of the stator core, the third end 5 and the fourth end 6 of the second upper side plate 21 are respectively provided with a second flange 25 adapted to the slot-shaped upper shape of the stator core, the first notch 30 and the second notch 40 extend to the first flange 15, the third notch 50 and the fourth notch 60 extend to the second flange 25, and the end of the first flange 15 and the end of the second flange 25 abut against each other and transition smoothly.

[0032] Of course, the first skeleton 1 and the second skeleton 2 are affected by errors or other factors, and the end faces of the first skeleton 1 and the second skeleton 2 are close, that is, there is a gap between the end faces of the first skeleton 1 and the second skeleton 2, and similarly, there is a gap between the end faces of the first reinforcement rib 14 and the second reinforcement rib 24 and the ends of the first flange 15 and the second flange 25.

Claims

1. An improved insulating frame structure, comprising a first frame and a second frame arranged on the teeth of a stator core, wherein the first frame and the second frame are both U-shaped, and characterized in that: The first frame has a first notch and a second notch at both ends of the opening, and the second frame has a third notch and a fourth notch at both ends of the opening. The first notch and the third notch are inlaid with each other, and the second notch and the fourth notch are inlaid with each other to make the ends of the first frame and the second frame abut against or close to each other, and the sides of the corresponding ends have a smooth transition.

2. The improved insulating frame structure according to claim 1 is characterized in that: The first notch and the second notch are formed by the concave side of the end portion of the first skeleton, and the third notch and the fourth notch are formed by the concave side of the end portion of the second skeleton.

3. The improved insulating frame structure according to claim 2 is characterized in that: The first notch and the second notch are asymmetrically arranged at two ends of the first frame, and the corresponding third notch and the fourth notch are asymmetrically arranged at two ends of the second frame.

4. The improved insulating frame structure according to claim 3 is characterized in that: The first frame opening forms a first end and a second end respectively, the first notch is formed by the inward concave shape of the outer side surface of the first end, and the second notch is formed by the inward concave shape of the inner side surface of the second end; the third end and a fourth end are formed by the second frame opening respectively, the third notch is formed by the inward concave shape of the inner side surface of the third end, and the fourth notch is formed by the inward concave shape of the outer side surface of the fourth end.

5. The improved insulating frame structure according to claim 4 is characterized in that: The first skeleton includes an integrally formed first substrate, a first upper side plate and a first lower side plate, the first substrate, the first upper side plate and the first lower side plate form a first coil groove on the upper and lower sides of the first substrate, the first notch and the second notch extend from the first substrate to the first upper side plate and the first lower side plate on both sides, the second skeleton includes an integrally formed second substrate, a second upper side plate and a second lower side plate, the second substrate, the second upper side plate and the second lower side plate form a second coil groove on the upper and lower sides of the second substrate, the third notch and the fourth notch extend from the second substrate to the second upper side plate and the second lower side plate on both sides, and after the first skeleton and the second skeleton are offset against each other, there is a smooth transition between the first substrate and the second substrate, the first upper side plate and the second upper side plate, and the first lower side plate and the second lower side plate.

6. The improved insulating frame structure according to claim 5 is characterized in that: The first end and the second end of the first upper side plate are respectively provided with a first flange adapted to the slot-shaped upper shape of the stator core, the third end and the fourth end of the second upper side plate are respectively provided with a second flange adapted to the slot-shaped upper shape of the stator core, the first notch and the second notch extend to the first flange, the third notch and the fourth notch extend to the second flange, and the first flange and the second flange ends abut and smoothly transition.

7. The improved insulating frame structure according to claim 5 is characterized in that: The first upper side plate and the first lower side plate are connected to the first substrate at the connection points, and the second upper side plate and the second lower side plate are connected to the second substrate at the connection points. After the first frame and the second frame abut against each other, the end faces of the first and second reinforcement ribs abut against each other.

8. The improved insulating frame structure according to claim 5 is characterized in that: The first lower side plate is respectively provided with a first convex edge on the side corresponding to the first end, the bottom surface of the first convex edge is flush with the bottom surface of the first lower side plate, and one end of the first convex edge extends to the first notch, the first lower side plate is respectively provided with a second convex edge on the side corresponding to the second end, the bottom surface of the second convex edge is higher than or flush with the top surface of the first convex edge, and one end of the second convex edge extends to the second notch, the second lower side plate is respectively provided with a third convex edge on the side corresponding to the third end, the third convex edge and the second convex edge are at the same horizontal position, and the third convex edge extends to the third notch, the second lower side plate is respectively provided with a fourth convex edge on the side corresponding to the fourth end, the fourth convex edge is at the same horizontal position as the first convex edge, and the fourth convex edge extends to the fourth notch, and when the first frame and the second frame are abutted against each other, gaps are left between the first convex edge and the third convex edge, and between the second convex edge and the fourth convex edge.

9. The improved insulating frame structure according to claim 5 is characterized in that: The second lower side plate is provided with an opening away from the first frame.

10. The improved insulating frame structure according to claim 1 is characterized in that: The planes of the outer sides of the first frame and the second frame and the rounded reinforcing ribs at the corners of the planes are smoothly transitioned, and the inner sides of the two frames are provided with concave surfaces for increasing the contact area.

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