T-shaped sheet iron core

Abstract

The utility model provides a kind of T-shaped sheet iron core, with perpendicular straight handle area, first side wing area, second side wing area, by through piece T-shaped sheet and repeatedly stacked multiple staggered T-shaped sheet composition;Adjacent staggered T-shaped sheet avoidance structure is arranged in one area avoidance structure between three areas, and the distribution position of multiple adjacent staggered T-shaped sheet is in turn cyclically alternative, and connecting structure is set in the lower surface of the remaining two areas of each staggered T-shaped sheet, and riveting recess is set in the upper surface corresponding connecting structure position, one connecting structure is embedded in the avoidance structure of lower adjacent staggered T-shaped sheet, another connecting structure and the riveting recess of lower adjacent staggered T-shaped sheet form riveting connection;The two connecting structures of staggered T-shaped sheet closest to through piece T-shaped sheet are embedded in the avoidance structure of through piece T-shaped sheet.Provide a kind of T-shaped sheet iron core, solve the problem that the rivet point of existing T-shaped sheet iron core is more, influence motor performance.

Description

Technical Field

[0001] This utility model relates to the field of motor components, specifically to a T-shaped sheet iron core. Background Technology

[0002] In the field of motor manufacturing, the iron core, as a core magnetic conductive component, directly affects the motor's operating efficiency, energy consumption, and reliability. Traditional iron core manufacturing processes widely employ riveting techniques. This process involves setting multiple riveting points between layers of silicon steel sheets. The blanking punch uses a pressure bar to rivet the laminations together with the previous lamination. A locking mechanism below the die provides locking force to the pressure bar, resulting in a tighter riveting connection and a secure bond between the silicon steel sheets. This process offers advantages such as ease of operation, controllable cost, and high production efficiency, and has been widely used in large-scale production for a long time.

[0003] However, with the continuous improvement of motor performance requirements, the limitations of riveting technology are becoming increasingly apparent. During the riveting process, the silicon steel sheet at the riveting point undergoes plastic deformation, damaging its internal magnetic domain structure and leading to localized stress concentration. Simultaneously, the physical barriers created by the riveting point alter the magnetic field distribution path, causing magnetic field distortion and resulting in increased vibration and noise during motor operation. More importantly, the number of riveting points is positively correlated with performance loss: when the riveting point density exceeds a critical value, the energy efficiency rating drops by 1-2 standard levels. Furthermore, it shortens the motor's lifespan, with this negative impact being particularly significant under high-frequency, high-speed operating conditions. Summary of the Invention

[0004] The problem this invention aims to solve is to provide a T-shaped sheet iron core that addresses the issue of existing T-shaped sheet iron cores having too many rivet points, thus affecting motor performance.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows: a T-shaped sheet iron core, having a vertical straight shank region and a first wing region and a second wing region symmetrically distributed at the top of the straight shank region, composed of a continuous T-shaped sheet and multiple staggered T-shaped sheets that are periodically and repeatedly stacked.

[0006] The T-shaped piece is the bottom layer, and avoidance structures are opened through its vertical straight handle area, first side wing area and second side wing area.

[0007] The avoidance structure of adjacent misaligned T-shaped pieces is set in one of the three regions: vertical straight handle region, first side wing region, and second side wing region. The distribution positions of multiple adjacent misaligned T-shaped pieces are alternated in sequence. A connecting structure is set on the lower surface of the other two regions of each misaligned T-shaped piece, and a riveting recess is set on the upper surface at the position corresponding to the connecting structure. One of the connecting structures is embedded in the avoidance structure of the lower adjacent misaligned T-shaped piece, and the other connecting structure forms a riveting connection with the riveting recess of the lower adjacent misaligned T-shaped piece.

[0008] The two connecting structures of the misaligned T-shaped piece closest to the through T-shaped piece are embedded within the avoidance structure of the through T-shaped piece.

[0009] The composite stacked structure of "through plate + misaligned plate" is adopted. The through plate serves as the base layer with a full-area avoidance structure, while the misaligned plate achieves misaligned riveting by periodically and alternately selecting avoidance areas (straight handle area / side wing area). Each misaligned plate retains only two connection structures. Through the alternating combination of "upper riveting - lower embedding" (one connection structure is embedded in the lower layer avoidance hole, and the other forms a spot riveting with the lower layer riveting recess), the number of rivet points in a single layer is reduced from 3 in the traditional structure to 1. The bottom through plate provides full-area avoidance support, and the double connection structure of the initial misaligned plate is directly embedded in the through plate base to establish a stable basic coupling. Under the premise of relatively maintaining stability, the number of rivet points is reduced.

[0010] Furthermore, the connecting structure is a rivet point, which is a V-shaped structure that protrudes downwards and is wider at the top and narrower at the bottom. The V-shaped structure makes it easier to align and insert the rivet point when riveting it with the riveting recess below, reducing the difficulty of the riveting operation and improving production efficiency.

[0011] Furthermore, the riveting recess is a downward-recessed groove with a trapezoidal cross-section that is wider at the top and narrower at the bottom. This groove is designed to fit and accommodate the lower part of the rivet point of the adjacent misaligned T-shaped pieces. The trapezoidal groove, wider at the top and narrower at the bottom, matches the V-shaped lower part of the rivet point, enabling precise fitting, ensuring the quality and stability of the riveting, and making the connection between adjacent T-shaped pieces more secure.

[0012] Furthermore, the clearance structure includes a through-hole and a clearance hole, wherein:

[0013] The through-hole is an opening that penetrates the vertical straight handle area, the first wing area and the second wing area of ​​the through-hole T-shaped piece along the thickness direction.

[0014] The clearance hole is an opening that penetrates a local area of ​​the misaligned T-shaped piece along the thickness direction, including a first clearance hole located in the vertical straight handle area, a second clearance hole located in the first side wing area, and a third clearance hole located in the second side wing area.

[0015] Furthermore, the cross-sections of the through-hole and the clearance opening are rectangular. A rectangular cross-section can distribute stress evenly under load, exhibiting good structural strength and stability, thus ensuring the reliability and safety of the core structure during use. Attached Figure Description

[0016] Figure 1 This is a bottom view of the present invention;

[0017] Figure 2 for Figure 1 Cross-sectional view of section AA;

[0018] Figure 3 for Figure 1 Cross-sectional view of the section cut by BB.

[0019] Illustration: 1. Vertical straight shank area; 2. First side wing area; 3. Second side wing area; 4. Through-piece T-shaped piece; 5. Offset T-shaped piece; 6. Connecting structure; 7. Riveting recess; 8. Avoidance structure; 8.1. Through-piece opening; 8.2. Displacement hole; 8.2.1. First displacement hole; 8.2.2. Second displacement hole; 8.2.3. Third displacement hole. Detailed Implementation

[0020] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0021] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0022] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0023] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] Please see Figures 1 to 3 A T-shaped sheet iron core structure has a vertical straight shank region 1 and a first side wing region 2 and a second side wing region 3 symmetrically distributed at the top of the vertical straight shank region 1. It is composed of a through T-shaped sheet and multiple staggered T-shaped sheets that are periodically stacked. The through T-shaped sheet is the bottom layer. A clearance structure 8 is opened through the vertical straight shank region 1, the first side wing region 2 and the second side wing region 3. The clearance structure 8 of the adjacent staggered T-shaped sheets is set in one of the three regions: the vertical straight shank region 1, the first side wing region 2 and the second side wing region 3. The distribution positions of the multiple adjacent staggered T-shaped sheets are cyclically alternating. The lower surface of the other two regions of each staggered T-shaped sheet is set with a downwardly protruding, V-shaped rivet point as a connecting structure 6. The upper surface corresponding to the position of the connecting structure 6 is set with a downwardly recessed, trapezoidal cross-section that is wider at the top and narrower at the bottom to fit and accommodate the lower part of the rivet point of the adjacent staggered T-shaped sheet above as a riveting recess 7. One of the connecting structures 6 is embedded in the lower adjacent staggered T-shaped sheet. Within the clearance structure 8 of the T-shaped piece, another connecting structure 6 forms a riveting connection with the riveting recess 7 of the adjacent misaligned T-shaped piece below. The two connecting structures 6 of the misaligned T-shaped piece closest to the through T-shaped piece are embedded within the clearance structure 8 of the through T-shaped piece. The clearance structure 8 includes a through opening 8.1 that penetrates the vertical straight handle region 1, the first side wing region 2, and the second side wing region 3 of the through T-shaped piece along the thickness direction, and a clearance hole 8.2 that penetrates a local area of ​​the misaligned T-shaped piece along the thickness direction, including a first clearance hole 8.2.1 located in the vertical straight handle region 1, a second clearance hole 8.2.2 located in the first side wing region 2, and a third clearance hole 8.2.3 located in the second side wing region 3. The cross-sections of the through opening 8.1 and the clearance opening are rectangular.

[0025] Specifically, the bottom layer is a through T-shaped piece with through openings 8.1 in its vertical straight handle area 1, first side wing area 2 and second side wing area 3, all penetrating through the through T-shaped piece 4 along the thickness direction;

[0026] The upper layer of the through T-shaped piece has a misaligned T-shaped piece with a first clearance hole 8.2.1 in the vertical straight shank area 1, and rivet points are provided on the lower surface of the first side wing area 2 and the second side wing area 3 of the misaligned T-shaped piece. Riveting recesses 7 are provided on the upper surface at the positions corresponding to the rivet points. The two rivet points are embedded in the through opening 8.1 in the first side wing area 2 and the second side wing area 3 of the through T-shaped piece.

[0027] The upper two layers of the through T-shaped piece have a second clearance hole 8.2.2 in the first side wing region 2, and rivet points are provided on the lower surface of the vertical straight handle region 1 and the second side wing region 3 of the through T-shaped piece. Riveting recesses 7 are provided on the upper surface at the positions corresponding to the rivet points. The two rivet points are respectively embedded in the first clearance hole 8.2.1 in the vertical straight handle region 1 of the upper layer of the through T-shaped piece and the riveting recesses 7 in the second side wing region 3.

[0028] A third clearance hole 8.2.3 is opened in the second side wing region 3 of the upper three layers of the through T-shaped piece, and rivet points are set on the lower surface of the vertical straight handle region 1 and the first side wing region 2 of the through T-shaped piece. Riveting recesses 7 are set on the upper surface at the corresponding rivet point positions. The two rivet points are respectively embedded in the second clearance hole 8.2.2 of the first side wing region 2 of the upper two layers of the through T-shaped piece and in the riveting recesses 7 of the vertical straight handle region 1.

[0029] Then repeat the stacking of the top layer of the full-size T-shaped sheet with staggered T-shaped sheets, the two layers above the full-size T-shaped sheet with staggered T-shaped sheets, and the three layers above the full-size T-shaped sheet with staggered T-shaped sheets until the required stacking height is reached.

[0030] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A T-shaped sheet iron core, characterized in that: It has a vertical straight handle region (1) and a first wing region (2) and a second wing region (3) symmetrically distributed at the top of the straight handle region, and is composed of a through T-shaped piece (4) and multiple staggered T-shaped pieces (5) that are periodically and repeatedly stacked. The through-plate T-shaped piece (4) is the bottom layer, and the avoidance structure (8) is opened through its vertical straight handle area (1), first side wing area (2) and second side wing area (3); The avoidance structure (8) of the adjacent misaligned T-shaped pieces (5) is set in one of the three regions: vertical straight handle region (1), first side wing region (2), and second side wing region (3). The distribution positions of multiple adjacent misaligned T-shaped pieces (5) are alternated in sequence. A connecting structure (6) is set on the lower surface of the other two regions of each misaligned T-shaped piece (5), and a riveting recess (7) is set on the upper surface corresponding to the position of the connecting structure (6). One of the connecting structures (6) is embedded in the avoidance structure (8) of the lower adjacent misaligned T-shaped piece (5), and the other connecting structure (6) forms a riveting connection with the riveting recess (7) of the lower adjacent misaligned T-shaped piece (5). The two connecting structures (6) of the misaligned T-shaped piece (5) closest to the through T-shaped piece (4) are embedded in the avoidance structure (8) of the through T-shaped piece (4).

2. The T-shaped sheet core according to claim 1, characterized in that: The connecting structure (6) is a rivet point, which is a V-shaped structure that is wider at the top and narrower at the bottom and protrudes downwards.

3. The T-shaped sheet core according to claim 2, characterized in that: The riveting recess (7) is a downward recessed groove with a cross-section that is wider at the top and narrower at the bottom, used to fit and accommodate the lower part of the rivet point of the adjacent misaligned T-shaped piece (5) above.

4. The T-shaped sheet core according to claim 1, characterized in that: The clearance structure (8) includes a through-hole (8.1) and a clearance hole (8.2), wherein: The through-hole (8.1) is an opening that penetrates the vertical straight handle area (1), the first side wing area (2), and the second side wing area (3) of the through-hole T-shaped piece (4) along the thickness direction; The clearance hole (8.2) is an opening that penetrates a local area of ​​the misaligned T-shaped piece (5) along the thickness direction, including a first clearance hole (8.2.1) located in the vertical straight handle area (1), a second clearance hole (8.2.2) located in the first side wing area (2), and a third clearance hole (8.2.3) located in the second side wing area (3).

5. The T-shaped sheet core according to claim 4, characterized in that: The cross-sections of the through-hole (8.1) and the clearance opening are rectangular.

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