Skeleton structure and electric motor

Abstract

The utility model discloses a framework structure and motor, include: the lead wire side framework and the opposite lead wire side framework of configuration at the both ends of stator core, the lead wire side framework includes: first component, along the axial direction and axial extension, a plurality of second components, and the second component is spaced apart each other and is arranged in the radial inboard of first component and along the circumference direction of first component extension, through the mode of thinning the tooth wall thickness of second component, forms the winding area between first component and second component, and the first reinforcing part is arranged at the connecting place of winding area and second component. Through above -mentioned mode, the utility model can realize to winding slot full rate, and the strength of framework tooth wall is compensated to reinforcing part, guarantees the strength and stability of framework overall structure.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a frame structure and an electric motor. Background Technology

[0002] Against the backdrop of the global energy crisis, the development of high-efficiency and energy-saving motors for industrial equipment to reduce carbon emissions is strongly encouraged. In the electric vehicle sector, motor efficiency, lightweight design, and cost control are crucial. Today, compressor motors must not only meet superior performance requirements but also adhere to environmentally friendly and low-carbon design principles to achieve a fusion of high efficiency and green technology.

[0003] In electric motor compressors, the internal electronic leads are wound on the winding slots of the motor frame inside the stator core. Most of these motor frames still use traditional designs. To ensure the mechanical strength of the frame teeth, traditional frames typically employ a large wall thickness, which directly limits the available space in the winding slots. In production, we can consider improving the slot fill factor on the frame in two ways: one is by extending the length of the winding region. While this method can increase the number of coils within the winding region, extending the winding region requires consideration of the overall space of the motor structure, resulting in many limitations and excessively high costs, making this method unsuitable.

[0004] Another approach is to reduce the wall thickness of the skeleton teeth. However, simply reducing the wall thickness of the skeleton teeth can lead to the following problems: (1) stress concentration at the root of the skeleton teeth, which can easily cause cracks during long-term operation (especially in high-speed motors); (2) a decrease in the overall rigidity of the skeleton, affecting the assembly accuracy and electromagnetic performance stability of the motor. In existing technologies, the slot fill factor is increased while the structure is compensated for in terms of strength. However, an overly conservative wall thickness scheme is often adopted. For example, the tooth wall thickness generally exceeds the actual mechanical requirements by more than 30% to ensure the strength of the skeleton. However, this not only increases the material cost but also leads to an increase in the weight of the motor, which goes against the requirements of lightweighting. Therefore, in the field of high-efficiency motors, increasing the slot fill factor requires overcoming the contradiction between structural strength and slot fill factor, as well as the cost and weight problems caused by redundant materials. Utility Model Content

[0005] The purpose of this utility model is to provide a frame structure and an electric motor using the frame structure. Through the reasonable design of the frame tooth root and tooth structure, the slot fill factor of the winding slot can be improved, while ensuring the structural strength of the frame.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A skeleton structure includes: a lead wire side skeleton and a reverse lead wire side skeleton disposed at both ends of a stator core;

[0008] The lead-side skeleton includes:

[0009] The first component extends along the axial direction and the axial direction;

[0010] A plurality of second components are arranged at intervals between each other on the radially inner side of the first component and extend circumferentially along the first component;

[0011] A winding region is formed between the first component and the second component by reducing the thickness of the tooth wall of the second component;

[0012] A first reinforcement is provided at the connection between the winding area and the second component.

[0013] Preferably, the first reinforcing portion includes a first concave arc surface, a second convex arc surface, and a third concave arc surface;

[0014] The second convex arc surface is located between the first concave arc surface and the third concave arc surface.

[0015] Preferably, the first concave arc surface is transitionally connected to the inner tooth wall of the second component, and the third concave arc surface is transitionally connected to the inner winding contact surface of the winding region.

[0016] Preferably, the radius of the arc of the first concave arc surface, the second convex arc surface, and the third concave arc surface is in the range of 0.3 to 0.5 mm.

[0017] Preferably, a second reinforcing part is further provided at the connection between the first component and the winding region.

[0018] Preferably, the second reinforcing part includes a fourth concave arc surface, a fifth convex arc surface, and a sixth concave arc surface;

[0019] The fifth convex arc surface is located between the fourth concave arc surface and the sixth concave arc surface.

[0020] Preferably, the fourth concave arc surface is transitionally connected to the inner tooth wall of the first component, and the sixth concave arc surface is transitionally connected to the inner winding contact surface of the winding region.

[0021] Preferably, the radius of the arc of the fourth concave arc surface, the fifth convex arc surface, and the sixth concave arc surface is in the range of 0.3 to 0.5 mm.

[0022] Preferably, a third reinforcing part is provided on the radially outer side of the first component. The third reinforcing part includes an arc-shaped columnar structure and a positioning post located at the lower end of the arc-shaped columnar structure and connected to the arc-shaped columnar structure for precise insertion into the positioning hole at the upper end of the stator core.

[0023] The arc-shaped columnar structure extends circumferentially along the first component.

[0024] An electric motor adopts the frame structure of this utility model.

[0025] The beneficial effects of this utility model are:

[0026] (1) This utility model discloses a skeleton structure, including a first component and a second component, and a winding area formed between the first component and the second component by reducing the tooth wall thickness of the second component. The number of winding turns in the winding area is increased by reducing the tooth wall thickness, thereby improving the slot fill factor. At the same time, a first reinforcing part is provided at the connection between the second component and the winding area. When the wall thickness of the skeleton tooth is reduced, the strength of the skeleton tooth and the rigidity of the overall structure are ensured, thus ensuring the stability of the motor during operation.

[0027] (2) This utility model discloses a skeleton structure. When the winding area of ​​the winding groove is expanded by thinning the tooth wall thickness of the first component, a second reinforcing part is provided at the connection between the first component and the winding area to compensate for the root strength of the skeleton tooth wall, ensuring the strength of the skeleton, and the root of the skeleton tooth will not break due to stress concentration.

[0028] (3) This utility model discloses an electric motor with a motor frame mechanism. A third reinforcing part is provided on the radial outer side of the first component. The third reinforcing part includes an arc-shaped column structure and a positioning column located below the arc-shaped column structure. One side of the third reinforcing part is used to connect the lead wire side frame to the stator core. At the same time, the third reinforcing part also supports the strength of the first component.

[0029] (4) This utility model discloses a skeleton structure in which the strength of the skeleton teeth is compensated by a reinforcing part at the root of the skeleton teeth, thereby improving the stability of the skeleton. At the same time, the three arc surfaces of the reinforcing part form a "step-like" shape at the root, which can improve the orderliness of the winding, avoid winding disorder, and improve the slot fill factor of the winding wire. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the skeleton structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the lead-side skeleton structure shown in this utility model;

[0032] Figure 3 This is a schematic cross-sectional view of the winding groove on the lead wire side skeleton shown.

[0033] Figure 4 This is a partial structural diagram of the first reinforcement on the lead-side skeleton shown.

[0034] Figure 5 This is a partial structural diagram of the second reinforcement on the lead-side skeleton shown.

[0035] Figure 6 This is a schematic diagram of the assembly of the lead wire side frame and the stator core.

[0036] The components in the attached diagram are labeled as follows:

[0037] 1. First component; 2. Second component; 3. Winding area; 4. First reinforcement; 4-1. First concave arc surface; 4-2. Second convex arc surface; 4-3. Third concave arc surface; 5. Second reinforcement; 5-1. Fourth concave arc surface; 5-2. Fifth convex arc surface; 5-3. Sixth concave arc surface; 6. Third reinforcement; 6-1. Arc-shaped columnar structure; 6-2. Positioning post; 7. Positioning hole. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0039] Example:

[0040] This embodiment describes a skeleton structure.

[0041] like Figure 1 , 2 As shown, Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the skeleton structure of this utility model. Figure 2 This is a schematic diagram of the lead-side skeleton structure shown in this utility model. A skeleton structure includes: a lead-side skeleton and a reverse lead-side skeleton disposed at both ends of the stator core;

[0042] The lead-side skeleton includes:

[0043] The first component 1 extends along the axial direction and the axial direction;

[0044] A plurality of second components 2 are arranged at intervals on the radial inner side of the first component 1 and extend circumferentially along the first component 1;

[0045] By reducing the thickness of the tooth wall of the second component, a winding region 3 is formed between the first component 1 and the second component 2. There are several winding regions, and the lead wire is wound around the winding region.

[0046] The first component, the second component, and the winding area together form the winding groove.

[0047] In this embodiment, the thickness of the skeleton tooth wall is reduced to expand the space of the winding area, thereby increasing the number of winding coils in the winding area and improving the slot fill factor.

[0048] like Figure 3 , 4 As shown, Figure 3 This is a schematic cross-sectional view of the winding groove on the lead wire side skeleton. Figure 4 This is a partial structural diagram of the first reinforcement on the lead wire side skeleton. As mentioned in the background art, simply thinning the thickness of the skeleton tooth wall will reduce the strength of the skeleton and make the root of the tooth wall prone to breakage. In order to solve this problem, this utility model proposes to provide a first reinforcement 4 at the connection between the winding region 3 and the second component 2.

[0049] This invention provides a first reinforcing part at the connection between the second component and the winding area. As the wall thickness of the skeleton teeth decreases, it not only improves the winding slot fill factor, but also does not affect the strength of the skeleton teeth or the rigidity of the overall structure, and ensures the stability of the motor during operation.

[0050] In a preferred embodiment, the first reinforcing part 4 includes a first concave arc surface 4-1, a second convex arc surface 4-2, and a third concave arc surface 4-3; the second convex arc surface 4-2 is located between the first concave arc surface 4-1 and the third concave arc surface 4-3. The first concave arc surface 4-1 is transitionally connected to the inner tooth wall of the second component 2, and the third concave arc surface 4-3 is transitionally connected to the inner winding contact surface of the winding region 3. When the tooth wall thickness of the second component decreases, the strength of the skeleton is ensured by the provided first reinforcing part.

[0051] In a preferred embodiment, the arc radius of the first concave arc surface 4-1, the second convex arc surface 4-2, and the third concave arc surface 4-3 is in the range of 0.3 to 0.5 mm.

[0052] To further ensure the rigidity and stability of the skeleton structure after the winding area is enlarged, a second reinforcement section 5 is also provided.

[0053] like Figure 5 As shown, Figure 5 This is a partial structural diagram of the second reinforcement 5 on the lead wire side skeleton. The second reinforcement 5 is located at the connection between the first component 1 and the winding region 3. The second reinforcement 5 includes a fourth concave arc surface 5-1, a fifth convex arc surface 5-2, and a sixth concave arc surface 5-3; the fifth convex arc surface 5-2 is located between the fourth concave arc surface 5-1 and the sixth concave arc surface 5-3. The fourth concave arc surface 5-1 is transitionally connected to the inner tooth wall of the first component 1, and the sixth concave arc surface 5-3 is transitionally connected to the inner winding contact surface of the winding region 3. This second reinforcement not only assists the first reinforcement in achieving the same function, but more importantly, it can enhance the winding strength of the skeleton when the tooth wall thickness of the first component is reduced, thereby further improving the winding fill factor of the skeleton, while ensuring the support strength of the skeleton tooth wall.

[0054] In the preferred embodiment, the radius of the arc of the fourth concave arc surface 5-1, the fifth convex arc surface 5-2, and the sixth concave arc surface 5-3 is in the range of 0.3 to 0.5 mm.

[0055] This utility model, through the provision of a first reinforcing part and a second reinforcing part, adds a reinforcing structure at the root of the skeleton winding groove to ensure the strength of the skeleton, and provides support for the winding area where the winding rate of the winding groove is increased by reducing the thickness of the tooth wall. This ensures that the overall structure of the skeleton is not affected by the reduction of the tooth wall thickness, and that the root of the skeleton teeth will not break due to stress concentration.

[0056] In a preferred embodiment, in order to further ensure that the first component is thinned due to the tooth wall thickness, the first component, as a supporting structure of the lead wire side skeleton, is further provided with a third reinforcing part 6 on the radial outer side of the first component 1.

[0057] like Figure 6 As shown, Figure 6 This is a schematic diagram of the assembly of the lead wire side frame and the stator core. The third reinforcement 6 includes an arc-shaped columnar structure 6-1 and a positioning post 6-2 located at the lower end of the arc-shaped columnar structure 6-1 and connected to the arc-shaped columnar structure 6-1 for precise insertion into the positioning hole 7 at the upper end of the stator core. The arc-shaped columnar structure 6 extends circumferentially along the first component 1.

[0058] By setting a third reinforcing part, this utility model not only realizes the connection and installation of the lead wire side frame and the stator core, but also, more importantly, the design of the arc-shaped columnar structure compensates for the strength of the tooth wall of the first component, thereby improving and ensuring the strength of the frame and ensuring the stability of the motor frame operation.

[0059] This invention, through a reasonable structural design of the lead wire side skeleton, expands the winding area by reducing the thickness of the winding slot tooth wall, increases the number of winding coils, and improves the slot fill factor. At the same time, it provides reinforcement to compensate for the strength of the tooth wall and tooth root of the winding slot, thereby solving the problem of stress concentration at the root of the skeleton teeth that may occur due to the reduction of the tooth wall thickness, which can easily lead to cracks during long-term operation and a decrease in the overall rigidity of the skeleton.

[0060] Meanwhile, the structural design of the reinforcement section forms a "stepped" shape at the tooth root, which can improve the orderliness of the winding, avoid winding disorder, and improve the slot fill factor of the winding wire.

[0061] Applying this frame structure to electric motors significantly improves assembly precision and electromagnetic performance stability. Furthermore, the overall improved structure of this invention is simple, without increasing material costs or motor weight. On the contrary, the reduced thickness of the frame tooth walls lowers the weight, achieving a lightweight motor design.

[0062] As shown in the above embodiments, this utility model greatly improves the winding slot fill factor while overcoming the contradiction between skeleton strength and slot fill factor, as well as the cost and weight problems caused by redundant materials.

[0063] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A skeletal structure, characterized by, include: Lead wire side frame and reverse lead wire side frame configured at both ends of the stator core; The lead-side skeleton includes: The first component (1) extends along the axial direction and the axial direction; A plurality of second components (2) are arranged at intervals between each other on the radially inner side of the first component (1) and extend circumferentially along the first component (1); By reducing the tooth wall thickness of the second component (2), a winding region (3) is formed between the first component (1) and the second component (2). A first reinforcement part (4) is provided at the connection between the winding area (3) and the second component (2).

2. The framework structure of claim 1, wherein, The first reinforcing part (4) includes a first concave arc surface (4-1), a second convex arc surface (4-2), and a third concave arc surface (4-3). The second convex arc surface (4-2) is located between the first concave arc surface (4-1) and the third concave arc surface (4-3).

3. The framework structure of claim 2, wherein, The first concave arc surface (4-1) is transitionally connected to the inner tooth wall of the second component (2), and the third concave arc surface (4-3) is transitionally connected to the inner winding contact surface of the winding region (3).

4. The framework of claim 3, wherein, The radius of the arc of the first concave arc surface (4-1), the second convex arc surface (4-2), and the third concave arc surface (4-3) is in the range of 0.3~0.5mm.

5. The framework of claim 1, wherein, A second reinforcing part (5) is also provided at the connection between the first component (1) and the winding region (3).

6. A framework structure as claimed in claim 5, wherein The second reinforcing part (5) includes a fourth concave arc surface (5-1), a fifth convex arc surface (5-2), and a sixth concave arc surface (5-3); The fifth convex arc surface (5-2) is located between the fourth concave arc surface (5-1) and the sixth concave arc surface (5-3).

7. A framework structure as claimed in claim 6, wherein The fourth concave arc surface (5-1) is transitionally connected to the inner tooth wall of the first component (1), and the sixth concave arc surface (5-3) is transitionally connected to the inner winding contact surface of the winding region (3).

8. A skeleton structure according to claim 6, characterized in that, The radius of the arc of the fourth concave arc surface (5-1), the fifth convex arc surface (5-2), and the sixth concave arc surface (5-3) is in the range of 0.3~0.5mm.

9. The framework of claim 1 wherein, A third reinforcing part (6) is provided on the radial outer side of the first component (1). The third reinforcing part (6) includes an arc-shaped columnar structure (6-1) and a positioning post (6-2) located at the lower end of the arc-shaped columnar structure (6-1) and connected to the arc-shaped columnar structure (6-1) for precise insertion into the positioning hole (7) at the upper end of the stator core. The arc-shaped columnar structure (6-1) extends circumferentially along the first component (1).

10. An electric motor, characterized in that, The skeleton structure described in any one of claims 1-9 is adopted.

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