Low-magnetic-flux-loss electric automobile motor iron core

Abstract

The utility model discloses an electric automobile motor iron core with low magnetic flux loss, which relates to the technical field of motor accessories and comprises an iron core main body, a plurality of groups of first punching sheets, a plurality of groups of second punching sheets and a plurality of groups of sealing caps. A plurality of groups of first injection grooves are formed in the outer walls of the two sides of the first punching sheet around the axis in an equal-angle array mode. According to the utility model, a plurality of groups of first punching sheets and second punching sheets are stacked by using a positioning tool, a plurality of groups of positioning blocks are inserted into positioning holes for limiting and fixing, after the iron core main body is stacked, the first through holes are communicated to form a through cavity, and the inner wall of the first through hole at one side is connected with a sealing cap; a binder is injected into the first injection groove and the second injection groove from the other side through the first through hole by using high-pressure glue injection equipment, the binder expands the punching sheets on the two sides due to continuous glue injection, injection is stopped after corners overflow, the redundant binder is scraped off, the first through hole and the first through hole on the other side are sealed by using a sealing cap, rapid bonding of the punching sheets is completed, and the coating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of motor accessories, specifically a low magnetic flux loss electric vehicle motor core. Background Technology

[0002] Early stator cores used ordinary soft iron, which had a simple manufacturing process and low performance requirements. With the development of technology, silicon steel sheets were introduced. The silicon content can improve magnetic permeability and reduce hysteresis loss. Rolling can also optimize grain orientation.

[0003] In the stator core production and assembly process, silicon steel sheets need to be stamped into specific shapes. If a self-adhesive method is used, a suitable adhesive needs to be selected and applied to the surface of the sheet by spraying, brushing, or rolling. Then, the sheets are stacked, and positioning tools are used to ensure the alignment of the sheets. Pre-curing can be selected, and then the sheets are placed in a curing device. The temperature, pressure, and time parameters are set according to the characteristics of the adhesive to complete the curing process. Alternatively, welding methods, such as laser welding, can be used. The stacked and clamped sheets are melted and solidified by focusing a high-energy-density laser beam on the edges. Argon arc welding is less commonly used for connecting stator core metal sheets due to its large heat-affected zone and easy oxidation.

[0004] However, existing motor stator cores still have some shortcomings in assembly. First, existing stator cores require one or more layers of adhesive to be evenly applied to the outer walls of both sides of the laminations during assembly. Then, each set of laminations with adhesive applied is positioned and stacked with positioning tools. Each set of laminations needs to be coated with adhesive, which requires workers to manually or with tools repeatedly move and align the laminations, which is quite difficult and reduces the assembly efficiency of the core. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a low magnetic flux loss electric vehicle motor core to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low magnetic flux loss electric vehicle motor core, comprising a core body, a first lamination, a second lamination, and a sealing cap, wherein the core body is composed of multiple sets of first laminations, second laminations, and sealing caps;

[0007] The outer walls of both sides of the first lamination are provided with multiple sets of first injection grooves arranged at equal angles around the axis. The inner walls of the first injection grooves on both sides are provided with first through holes. The outer walls of both sides of the second lamination are provided with second injection grooves at positions opposite to the first injection grooves. The inner walls of each set of second injection grooves are provided with second through holes at positions corresponding to the first through holes.

[0008] By adopting the above technical solution, multiple sets of first and second stampings are first stacked using positioning tools, and multiple sets of positioning blocks are inserted into positioning holes for limiting and fixing. After the iron core is stacked, its first through holes are connected to form a through cavity. A sealing cap is connected to the inner wall of the first through hole on one side. Adhesive is injected into the first and second injection grooves through the first through hole from the other side using a high-pressure glue injection device. Due to the continuous glue injection, the adhesive expands the stampings on both sides. After the corners overflow, the injection is stopped, the excess adhesive is scraped off, and the sealing cap is used to seal the first through hole on the other side, thus completing the rapid bonding of the stampings and improving the coating efficiency.

[0009] Furthermore, the included angle between each set of first and second injection slots is 120 degrees, and the multiple sets of first and second injection slots on both sides are symmetrical.

[0010] By adopting the above technical solution, each group of first and second injection grooves cooperates to form an injection cavity.

[0011] Furthermore, the included angle between each group of first and second through holes is 120 degrees, and the multiple groups of first and second through holes on both sides are symmetrical.

[0012] By adopting the above technical solution, the first through hole and the second through hole can be easily connected to each group of first injection grooves and second injection grooves, which facilitates glue injection.

[0013] Furthermore, the inner wall of the second through hole is provided with internal threads, the inner wall of the first through hole is a smooth curved surface, and the inner diameter of the first through hole is slightly larger than the inner diameter of the second through hole.

[0014] By adopting the above technical solution, the internal thread on the inner wall of the second through hole can facilitate the installation of the sealing cap to seal the glue injection cavity. The inner diameter of the first through hole is slightly larger than that of the second through hole, which can increase the space of the glue injection cavity and prevent blockage.

[0015] Furthermore, in each group, the first injection groove and the first through hole are fitted together with the second injection groove and the second through hole, and the cross-section of the first injection groove and the second injection groove are both curved "I" shapes.

[0016] By adopting the above technical solution, the cross-sections of the first injection groove and the second injection groove are both curved "I" shapes, which can increase the contact area with the first and second laminations and improve the connection stability.

[0017] Furthermore, the outer wall of the first lamination has multiple sets of positioning holes arranged in an equal-angle array, and the outer wall of the second lamination has multiple sets of positioning blocks fixed in an equal-angle array, with each set of positioning blocks inserted into the positioning hole.

[0018] By adopting the above technical solution, multiple sets of positioning holes and positioning blocks can be used to initially connect and fix the first and second laminations, which facilitates the stability of the iron core body.

[0019] Furthermore, the outer diameter of each positioning block is slightly larger than the inner diameter of the positioning hole, and the end face of the positioning block is a smooth curved surface.

[0020] By adopting the above technical solution, the outer diameter of each positioning block is slightly larger than the inner diameter of the positioning hole, so that it can fit tightly against the inner wall of the positioning hole to prevent the connection from becoming loose. The end face of the positioning block is a smooth curved surface, which can prevent the positioning block from scratching the surface of the first stamping during stacking and causing damage. At the same time, it reduces friction and reduces the difficulty of docking.

[0021] Furthermore, the two sets of symmetrical first through holes are internally threaded with sealing caps, and a slot is formed at the center of the outer wall of the end of the sealing cap away from the second punch.

[0022] By adopting the above technical solution, a slot is opened at the center of the outer wall of the end of the sealing cap away from the second punch, which makes it convenient for workers to tighten or loosen the cap with a screwdriver.

[0023] In summary, the present invention has the following main advantages:

[0024] This invention involves stacking multiple sets of first and second laminations using a positioning tool, while simultaneously fixing them with multiple sets of positioning blocks inserted into positioning holes. After the iron core body is stacked, its first through holes are connected to form a through cavity. A sealing cap is connected to the inner wall of one side of the first through hole, and adhesive is injected into the first and second injection grooves through the first through hole from the other side using a high-pressure adhesive injection device. Due to continuous adhesive injection, the adhesive expands the laminations on both sides. The injection is stopped after the edges overflow, and excess adhesive is scraped off. The sealing cap is then used to seal the first through hole on the other side, thus completing the rapid bonding of the laminations and improving coating efficiency. Attached Figure Description

[0025] Figure 1 This is a front view of the iron core body of this utility model;

[0026] Figure 2 Here are detailed structural drawings of the first and second laminations of this utility model;

[0027] Figure 3 This is a detailed diagram showing the positional distribution of the first and second laminations of this utility model;

[0028] Figure 4 This is a disassembled cross-sectional view of the first and second laminations of this utility model;

[0029] Figure 5 This is a cross-sectional view of the first and second laminations of this utility model.

[0030] In the figure: 1. Iron core body; 2. First lamination; 21. First injection groove; 211. First through hole; 22. Positioning hole; 3. Second lamination; 31. Second injection groove; 311. Second through hole; 32. Positioning block; 4. Sealing cap. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The embodiments of this utility model will be described below based on its overall structure.

[0033] A low flux loss electric vehicle motor core, such as Figure 1 - Figure 5 As shown, it includes a core body 1, a first lamination 2, a second lamination 3, and a sealing cap 4. The core body 1 is composed of multiple sets of first laminations 2, second laminations 3, and sealing caps 4.

[0034] The outer walls of both sides of the first stamping 2 are provided with multiple sets of first injection grooves 21 arranged at equal angles around the axis. The inner walls of the first injection grooves 21 on both sides are provided with first through holes 211. The outer walls of both sides of the second stamping 3 are provided with second injection grooves 31 at positions opposite to the first injection grooves 21. The inner walls of each set of second injection grooves 31 are provided with second through holes 311 at positions corresponding to the first through holes 211.

[0035] This invention involves stacking multiple sets of first punches 2 and second punches 3 using a positioning tool, while simultaneously using multiple sets of positioning blocks 32 inserted into positioning holes 22 for positioning and fixation. After the iron core body 1 is stacked, its first through holes 211 are connected to form a through cavity. A sealing cap 4 is connected to the inner wall of one side of the first through hole 211. Adhesive is injected from the other side through the first through hole 211 into the first injection groove 21 and the second injection groove 31 using a high-pressure glue injection device. Due to continuous glue injection, the adhesive expands the punches on both sides. After the corners overflow, the injection is stopped, excess adhesive is scraped off, and the sealing cap 4 is used to seal the other side of the first through hole 211, thus completing the rapid bonding of the punches and improving the coating efficiency.

[0036] Please see Figure 2 - Figure 5 The included angle between each group of first injection groove 21 and second injection groove 31 is 120 degrees, and the multiple groups of first injection groove 21 and second injection groove 31 on both sides are symmetrical. By setting the above structure, this utility model utilizes the cooperation of each group of first injection groove 21 and second injection groove 31 to form an injection cavity.

[0037] Please see Figure 2 - Figure 5The included angle between each group of first through holes 211 and second through holes 311 is 120 degrees, and the multiple groups of first through holes 211 and second through holes 311 on both sides are symmetrical. By setting the above structure, the first through holes 211 and second through holes 311 can be easily connected to each group of first injection grooves 21 and second injection grooves 31, which is convenient for injection.

[0038] Please see Figure 2 - Figure 5 The inner wall of the second through hole 311 is provided with an internal thread, the inner wall of the first through hole 211 is a smooth curved surface, and the inner diameter of the first through hole 211 is slightly larger than the inner diameter of the second through hole 311. By setting the above structure, the internal thread on the inner wall of the second through hole 311 can facilitate the installation of the sealing cap 4 to seal the glue injection cavity. The inner diameter of the first through hole 211 being slightly larger than the inner diameter of the second through hole 311 can increase the space of the glue injection cavity and prevent blockage.

[0039] Please see Figure 2 - Figure 5 Each first injection groove 21 and first through hole 211 are fitted together with the second injection groove 31 and second through hole 311. The cross-sections of the first injection groove 21 and the second injection groove 31 are both curved "I" shapes. By setting the above structure, the cross-sections of the first injection groove 21 and the second injection groove 31 are both curved "I" shapes, which can increase the contact area with the first stamping piece 2 and the second stamping piece 3 and improve the connection stability.

[0040] Please see Figure 2 - Figure 5 The outer wall of the first lamination 2 is provided with multiple sets of positioning holes 22 arranged at equal angles, and the outer wall of the second lamination 3 is fixed with multiple sets of positioning blocks 32 arranged at equal angles. Each set of positioning blocks 32 is inserted into the positioning hole 22. By setting the above structure, the multiple sets of positioning holes 22 and positioning blocks 32 can cooperate to initially connect and fix the first lamination 2 and the second lamination 3, which facilitates the stability of the iron core body 1.

[0041] Please see Figure 2 - Figure 5 The outer diameter of each positioning block 32 is slightly larger than the inner diameter of the positioning hole 22, and the end face of the positioning block 32 is a smooth curved surface. By setting the above structure, the outer diameter of each positioning block 32 is slightly larger than the inner diameter of the positioning hole 22, so that it can fit tightly against the inner wall of the positioning hole 22 to prevent loosening of the connection. The smooth curved surface of the end face of the positioning block 32 can prevent the positioning block 32 from scratching the surface of the first punch 2 and causing damage when stacking, while reducing friction and reducing the difficulty of docking.

[0042] Please see Figure 3 - Figure 5The first through holes 211, which are symmetrical to each other, are internally threaded with sealing caps 4. A slot is formed at the center of the outer wall of the end of the sealing cap 4 away from the second punch 3. By setting the above structure, the slot at the center of the outer wall of the end of the sealing cap 4 away from the second punch 3 makes it easy for workers to tighten or loosen the screws with a screwdriver.

[0043] The working principle of this utility model is as follows: When assembling the iron core, multiple sets of first laminations 2 and second laminations 3 are firstly stacked with positioning tools, wherein the first laminations 2 and second laminations are stacked alternately. At the same time, multiple sets of positioning blocks 32 are inserted into positioning holes 22 for limiting and fixing. After the iron core is stacked, the first through holes 211 of multiple sets of first laminations 2 and second laminations 3 are connected to form a through cavity. Then, a sealing cap 4 is connected to the inner wall of the first through hole 211 on one side. Next, the adhesive is injected from the other side through another set of first through holes 211 using a high-pressure glue injection device. The adhesive enters the first injection groove 21 and the second injection groove 31 through the first through hole 211 respectively. As the high-pressure glue injection device continuously injects glue, the adhesive expands the first laminations 2 and second laminations 3 on both sides. After the adhesive overflows from the corners of the first laminations 2 and second laminations 3, the glue injection is stopped. Then, the excess adhesive is scraped off with a tool. Finally, the sealing cap 4 is used to seal the first through hole 211 on the other side. The first laminations 2 and second laminations 3 can be quickly bonded by the above method, improving the coating efficiency.

[0044] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A low flux loss electric vehicle motor core comprising a core body (1), a first lamination (2), a second lamination (3), a sealing cap (4), characterized in that: The iron core body (1) is composed of multiple sets of first laminations (2), second laminations (3), and sealing caps (4); The outer walls of the first stamp (2) are arranged at equal angles around the axis to form multiple sets of first injection grooves (21). The inner walls of the first injection grooves (21) on both sides are provided with first through holes (211). The outer walls of the second stamp (3) on both sides are provided with second injection grooves (31) at positions opposite to the first injection grooves (21). The inner walls of each set of second injection grooves (31) are provided with second through holes (311) at positions corresponding to the first through holes (211).

2. The low flux loss electric vehicle motor core according to claim 1, characterized in that: The included angle between each group of first injection groove (21) and second injection groove (31) is 120 degrees, and the multiple groups of first injection groove (21) and second injection groove (31) on both sides are symmetrical.

3. The low flux loss electric vehicle motor core according to claim 1, characterized in that: The included angle between each group of first through holes (211) and second through holes (311) is 120 degrees, and the multiple groups of first through holes (211) and second through holes (311) on both sides are symmetrical.

4. The low magnetic flux loss electric vehicle motor core according to claim 1, characterized in that: The inner wall of the second through hole (311) is provided with an internal thread, the inner wall of the first through hole (211) is a smooth curved surface, and the inner diameter of the first through hole (211) is slightly larger than the inner diameter of the second through hole (311).

5. The low flux loss electric vehicle motor core according to claim 1, characterized in that: The first injection groove (21) and the first through hole (211) of each group are in contact with the second injection groove (31) and the second through hole (311), and the cross-section of the first injection groove (21) and the second injection groove (31) are both curved "I" shapes.

6. The low flux loss electric vehicle motor core according to claim 1, characterized in that: The outer wall of the first punch (2) is provided with multiple sets of positioning holes (22) arranged at equal angles, and the outer wall of the second punch (3) is fixed with multiple sets of positioning blocks (32) arranged at equal angles, and each set of positioning blocks (32) is inserted into the positioning hole (22).

7. The low magnetic flux loss electric vehicle motor core according to claim 1, characterized in that: The outer diameter of each positioning block (32) is slightly larger than the inner diameter of the positioning hole (22), and the end face of the positioning block (32) is a smooth curved surface.

8. The low magnetic flux loss electric vehicle motor core according to claim 1, characterized in that: Two sets of symmetrical first through holes (211) are internally threaded with sealing caps (4), and a slot is opened at the center of the outer wall of the end of the sealing cap (4) away from the second punch (3).

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