Stator assembly structure

Abstract

The utility model provides a stator assembly structure, which belongs to the technical field of ducted motors and comprises a stator core, insulation paper and two insulation frameworks. The insulation paper is glued in a groove of the stator core, and two ends of the insulation paper extend out of the stator core; the two insulating frameworks are respectively located at two ends of the stator core, the insulating frameworks sleeve the outer side of the insulating paper and are clamped and positioned by means of the insulating paper, and the end surfaces of the insulating frameworks and the end surface of the stator core are attached and fixed by glue. According to the stator assembly structure provided by the utility model, the two ends of the insulation paper extend out of the stator iron core and are used as supporting structures for positioning the insulation framework, and the end part of the insulation framework is attached to the end surface of the stator iron core and is fixed through glue; the insulating framework does not need to be embedded into the inner side of the stator core, so that the placement area of the enameled wire is increased, and the slot fullness rate is improved; and the insulating framework does not exceed the outer diameter of the stator, so that the assembly of the motor shell is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ducted motors, and more specifically, relates to a stator assembly structure. Background Art

[0002] Flying cars have very strict requirements on the weight of each component. The volume of the motor and stator will be compressed, resulting in an increased slot fill rate and a narrower yoke.

[0003] Traditionally, the insulation frame is positioned by inserting it into the stator slots. However, due to the thickness of the insulation frame, the enameled wire winding slot fill rate is greatly reduced, resulting in low material utilization and a low power-to-volume ratio. Furthermore, for thicker stator cores, the insulation frame's length inside the core slots is too long, making it difficult and costly to manufacture. This also affects the overall size of the motor. Utility Model Content

[0004] The purpose of the utility model is to provide a stator assembly structure, aiming to increase the placement area of ​​the enameled wire and improve the slot fill rate.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: providing a stator assembly structure, comprising a stator core, insulating paper and two insulating frames; the insulating paper is glued into the slots of the stator core, and both ends of the insulating paper extend out of the stator core; the two insulating frames are respectively located at the two ends of the stator core, the insulating frames are sleeved on the outside of the insulating paper and are positioned by means of the insulating paper, and the end faces of the insulating frames are adhered to and glued to the end faces of the stator core.

[0006] As another embodiment of the present application, the insulating paper is 0.2 mm thick NHN insulating paper.

[0007] As another embodiment of the present application, the two ends of the insulating paper extend out of the stator core at the same length.

[0008] As another embodiment of the present application, the length of the end portion of the insulating paper extending from the stator core is greater than or equal to 2 mm.

[0009] As another embodiment of the present application, the insulating skeleton includes an annular exoskeleton and multiple tooth guard structures; the multiple tooth guard structures are evenly distributed on the inner side of the annular exoskeleton, the tooth guard structure is in contact with the end face of the annular exoskeleton at one end close to the stator core, and the tooth guard structure corresponds one-to-one to the teeth of the stator core; two adjacent tooth guard structures cooperate with the inner side wall of the annular exoskeleton to form a connecting groove, and the end of the insulating paper extends into the connecting groove and is in contact with the side wall of the connecting groove.

[0010] As another embodiment of the present application, the tooth guard structure includes a winding portion and an inner tooth guard, the winding portion extends radially, and the inner tooth guard is arranged at one end of the winding portion away from the annular outer skeleton; the width of the inner tooth guard is greater than the width of the winding portion; the lateral edge of the insulating paper exceeds the edge of the inner tooth guard.

[0011] As another embodiment of the present application, the axial length of the winding portion along the insulating skeleton is smaller than the axial length of the annular outer skeleton; the edge of the insulating paper in the longitudinal direction is flush with the edge of the winding portion.

[0012] As another embodiment of the present application, the edge of the inner mouthpiece protrudes from the winding portion and is flush with the annular outer skeleton.

[0013] The stator assembly structure provided by the present invention has the following beneficial effects: compared with the prior art, in the stator assembly structure of the present invention, the insulating paper is inserted into the slots of the stator core and then fixed with glue; both ends of the insulating paper extend out of the stator core and serve as a support structure for positioning the insulating frame; the two ends of the insulating paper correspond to two insulating frames respectively, and the ends of the insulating paper are inserted into the slots of the insulating frames to achieve the positioning of the insulating frames; the ends of the insulating frames are in contact with the end faces of the stator core and fixed by gluing; the insulating frames do not need to be embedded in the inner side of the stator core, thereby increasing the placement area of ​​the enameled wire and improving the slot fill rate; and the insulating frames do not exceed the outer diameter of the stator, and do not affect the assembly of the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 these drawings without paying any creative work.

[0015] Figure 1 A schematic structural diagram of a stator assembly structure provided in an embodiment of the present utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the stator assembly structure provided in an embodiment of the present utility model.

[0017] In the figure: 1. Stator core; 2. Insulation frame; 3. Insulation paper; 4. Winding part; 5. Inner tooth guard. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples.

[0019] Please refer to Figures 1 to 2 The stator assembly structure comprises a stator core 1, insulating paper 3 and two insulating frames 2; the insulating paper 3 is glued in the slot of the stator core 1, and the two ends of the insulating paper 3 extend out of the stator core 1; the two insulating frames 2 are located at the two ends of the stator core 1 respectively, the insulating frame 2 is sleeved on the outer side of the insulating paper 3 and is positioned by means of the insulating paper 3, and the end face of the insulating frame 2 is bonded and fixed with the end face of the stator core 1.

[0020] Compared with the prior art, the insulating paper 3 is inserted into the slot of the stator core 1 and is fixed by glue, the two ends of the insulating paper 3 extend out of the stator core 1 and are used as a support structure for positioning the insulating frame 2, the two ends of the insulating paper 3 correspond to the two insulating frames 2 respectively, and the end part of the insulating paper 3 is inserted into the slot of the insulating frame 2 to realize the positioning of the insulating frame 2; the end part of the insulating frame 2 is bonded and fixed with the end face of the stator core 1; the insulating frame 2 does not need to be embedded in the inner side of the stator core 1, thereby increasing the placement area of the enameled wire and improving the slot fill rate; and the insulating frame 2 does not exceed the outer diameter of the stator, thereby not affecting the assembly of the motor shell.

[0021] The insulating paper 3 can be 0.2mm thick NHN insulating paper. The NHN insulating paper is a flexible composite material composed of a middle layer of polyimide film and its two sides of Dupont paper, and has a heat resistance level of H level (180℃).

[0022] The lengths of the two ends of the insulating paper 3 extending out of the stator core 1 are consistent, so as to ensure that the connection strength of the two insulating frames 2 is consistent. The length of any end of the insulating paper 3 extending out of the stator core 1 is greater than or equal to 2mm, and the length of any end of the insulating paper 3 extending out of the stator core 1 is less than the length of the insulating frame 2. Taking the example that the lengths of the two ends of the insulating paper 3 extending out of the stator core 1 are both 2mm, the 2mm insulating paper 3 extends into the slot of the insulating frame 2 and is bonded to the inner side wall of the slot body of the insulating frame 2.

[0023] Since the insulating paper 3 is glued in each slot of the stator core 1, the insulating paper 3 has a plurality of insulating papers 3, and the plurality of insulating papers 3 are distributed at equal intervals along the annular track. Correspondingly, the insulating frame 2 has a slot body in the same number as the insulating paper 3. The insulating frame 2 is sleeved on the plurality of insulating papers 3, and the slot body in the inner side of the insulating frame 2 corresponds to the plurality of insulating papers 3 one by one, thereby realizing the positioning of the insulating frame 2.

[0024] In some possible embodiments, see Figure 1 The insulating skeleton 2 includes an annular exoskeleton and multiple tooth guard structures; the multiple tooth guard structures are evenly distributed on the inner side of the annular exoskeleton, and the tooth guard structure is in contact with the end face of the annular exoskeleton at one end close to the stator core 1, and the tooth guard structure corresponds one-to-one to the teeth of the stator core 1; two adjacent tooth guard structures cooperate with the inner side wall of the annular exoskeleton to form a connecting groove, and the end of the insulating paper 3 extends into the connecting groove and is in contact with the side wall of the connecting groove.

[0025] The multiple tooth guard structures fit in a one-to-one correspondence with the multiple teeth of the stator core 1, and the annular exoskeleton fits in a corresponding correspondence with the outer ring of the stator core 1. The inner diameter of the annular exoskeleton is consistent with the inner diameter of the stator core 1, and the outer diameter of the annular exoskeleton is smaller than the outer diameter of the stator core 1.

[0026] The multiple tooth guard structures cooperate with the annular outer frame to form a connecting groove with an opening toward the central axis. The multiple groove bodies of the above-mentioned insulating frame 2 are the connecting grooves formed by the tooth guard structures and the annular outer frame.

[0027] The tooth guard structure includes a winding part 4 and an inner tooth guard 5. The winding part 4 extends radially, and the inner tooth guard 5 is arranged at one end of the winding part 4 away from the annular outer frame; the width of the inner tooth guard 5 is greater than the width of the winding part 4, and the lateral edge of the insulating paper 3 exceeds the edge of the inner tooth guard 5.

[0028] Insulating paper 3 is glued into each slot of the stator core 1, and the two ends of each insulating paper 3 in the length direction extend to the ends of the winding parts 4 of the two insulating frames 2; the width direction of each insulating paper 3 is fitted to the teeth on both sides of the slot of the stator core 1, and the two ends of the insulating paper 3 extend to the edges of the inner guard teeth 5 beyond the insulating frame 2.

[0029] Because the width of the inner tooth 5 is greater than the width of the winding portion 4, the width of the connecting slot at the notch is reduced. The insulating paper 3 in the connecting slot always adheres to the inner side wall of the connecting slot and extends toward the notch along the edge of the inner tooth 5 until it extends beyond the edge of the inner tooth 5.

[0030] The axial length of the winding portion 4 along the insulating frame 2 is less than the axial length of the annular outer frame; the longitudinal edge of the insulating paper 3 is flush with the edge of the winding portion 4. When the axial length of the winding portion 4 is 2 mm, the insulating paper 3 protrudes from the stator core 1 by 2 mm, and the insulating paper 3 adheres to the side wall of the winding portion 4, with the ends being flush.

[0031] The edge of the inner tooth 5 protrudes beyond the winding portion 4 and is flush with the annular outer frame. That is, one end of the inner tooth 5 abuts against the end faces of the multiple teeth at the end of the stator core 1; the other end of the inner tooth 5 is flush with the annular outer frame. During attachment, both the end faces of the annular outer frame and the tooth structure must be glued to the stator core 1.

[0032] During installation, first glue the insulating paper 3 into the slots of the stator core 1. Then, install the insulating frame 2, which is then snap-fitted to the insulating paper 3. After the snap-fitting is complete, glue the insulating paper 3 to the annular outer frame, winding portion 4, and inner teeth 5 of the insulating frame 2. After the insulating frame 2 and stator core 1 are secured, winding can proceed.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Stator assembly structure, characterized in that, The invention comprises a stator core (1), insulating paper (3) and two insulating frames (2); the insulating paper (3) is glued into the slot of the stator core (1), and both ends of the insulating paper (3) extend out of the stator core (1); the two insulating frames (2) are respectively located at the two ends of the stator core (1), the insulating frames (2) are sleeved on the outside of the insulating paper (3) and are positioned by means of the insulating paper (3), and the end faces of the insulating frames (2) are attached to and glued to the end faces of the stator core (1).

2. The stator assembly structure according to claim 1, characterized in that: The insulating paper (3) is 0.2 mm thick NHN insulating paper.

3. The stator assembly structure according to claim 1, characterized in that: The two ends of the insulating paper (3) extend out of the stator core (1) to the same length.

4. The stator assembly structure according to claim 3, characterized in that: The length by which the end of the insulating paper (3) extends from the stator core (1) is greater than or equal to 2 mm.

5. The stator assembly structure according to claim 1, wherein: The insulating frame (2) comprises an annular outer frame and a plurality of tooth guard structures; the plurality of tooth guard structures are evenly distributed on the inner side of the annular outer frame, the tooth guard structures are in contact with the end face of the annular outer frame at one end close to the stator core (1), and the tooth guard structures correspond one-to-one with the teeth of the stator core (1); two adjacent tooth guard structures cooperate with the inner side wall of the annular outer frame to form a connecting groove, and the end of the insulating paper (3) extends into the connecting groove and is in contact with the side wall of the connecting groove.

6. The stator assembly structure according to claim 5, characterized in that: The tooth guard structure comprises a winding portion (4) and an inner tooth guard (5), wherein the winding portion (4) extends radially, and the inner tooth guard (5) is arranged at one end of the winding portion (4) away from the annular outer frame; the width of the inner tooth guard (5) is greater than the width of the winding portion (4); and the lateral edge of the insulating paper (3) exceeds the edge of the inner tooth guard (5).

7. The stator assembly structure according to claim 6, characterized in that: The length of the winding portion (4) along the axial direction of the insulating skeleton (2) is smaller than the length of the annular outer skeleton along the axial direction; and the edge of the insulating paper (3) in the longitudinal direction is flush with the edge of the winding portion (4).

8. The stator assembly structure according to claim 6, wherein: The edge of the inner tooth guard (5) protrudes from the winding portion (4) and is flush with the annular outer frame.

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