A coil former for an automobile generator

Abstract

This utility model relates to the field of generator technology, specifically to a coil frame for an automotive generator, including a first coil frame and a second coil frame. The first coil frame includes a first end face insulation portion, a first slot insulation portion, and a first snap-fit ​​portion. The second coil frame includes a second end face insulation portion, a second slot insulation portion, and a second snap-fit ​​portion. The first snap-fit ​​portion is disposed corresponding to the second slot insulation portion, and the second snap-fit ​​portion is disposed corresponding to the first slot insulation portion. The first slot insulation portion extends from the first end face insulation portion to the second snap-fit ​​portion, and the second slot insulation portion extends from the second end face insulation portion to the first snap-fit ​​portion. The first slot insulation portion and the second slot insulation portion are joined left and right to jointly cover the tooth slots. By connecting the end of the first slot insulation portion with the second end face insulation portion and the end of the second slot insulation portion with the first end face insulation portion, the connection between the first coil frame and the second coil frame is located in the stator core end area, thereby facilitating observation and disassembly by the operator.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, specifically to a coil frame for an automotive generator. Background Technology

[0002] The coil bobbin (also known as the winding frame or coil frame) is a key component of the generator stator winding. It provides mechanical support for the copper wire winding to maintain its shape and position, and isolates the winding from the stator core to prevent short circuits. A common type of coil bobbin is an interlocking structure, consisting of an upper bracket and a lower bracket. Both the upper and lower brackets have end-face insulation and slot insulation, with the slot insulation extending into the slots of the stator core for slot insulation. Specifically, the slot insulation of the upper bracket extends downwards into the slot, and the slot insulation of the lower bracket extends upwards into the slot. The two slot insulations interlock within the slots, assembling the coil bobbin. The upper half of the slot is insulated by the corresponding upper slot insulation, and the lower half is insulated by the corresponding lower slot insulation.

[0003] However, in the existing technical solution, the slot insulation part is roughly engaged in the middle part of the slot along the vertical direction. This position is relatively hidden and difficult to observe, and it is even more difficult to reach in a tool to operate. Therefore, on the one hand, it is impossible to observe whether it is engaged in place during installation, and on the other hand, it is difficult to reach in a tool to pry open the engaged part when it is necessary to disassemble the coil frame, thus causing inconvenience in disassembling and assembling the coil frame. Utility Model Content

[0004] The purpose of this utility model is to provide a solution that solves the problem of the connection between the upper and lower spliced ​​wire frames being located inside the tooth groove, making it difficult to observe and inconvenient to disassemble and assemble. By connecting the end of the first groove insulation part with the second end face insulation part and the end of the second groove insulation part with the first end face insulation part, the connection between the first wire frame and the second wire frame is located in the end area of ​​the stator core, which makes it easier for operators to observe and disassemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coil frame for an automotive generator, comprising a first wire frame and a second wire frame. The first wire frame includes a first end face insulation portion, a first slot insulation portion, and a first snap-fit ​​portion, both of which are disposed on the first end face insulation portion. The second wire frame includes a second end face insulation portion, a second slot insulation portion, and a second snap-fit ​​portion, both of which are disposed on the second end face insulation portion. The first snap-fit ​​portion is disposed corresponding to the second slot insulation portion, and the second snap-fit ​​portion is disposed corresponding to the first slot insulation portion. The first slot insulation portion extends from the first end face insulation portion to the second snap-fit ​​portion, and the second slot insulation portion extends from the second end face insulation portion to the first snap-fit ​​portion. The first slot insulation portion and the second slot insulation portion are joined together left and right to jointly cover the tooth slot.

[0006] In one embodiment, the first latching portion and the second latching portion are groove structures, the first groove insulating portion is inserted into the second latching portion, and the second groove insulating portion is inserted into the first latching portion.

[0007] In one embodiment, the end of the first slot insulating portion is provided with a first plug-in portion, which is used to cooperate with the second snap-fit ​​portion for connection. The thickness of the first plug-in portion is less than that of the first slot insulating portion, so that a first step surface that is easy to pry is formed between the first plug-in portion and the first slot insulating portion.

[0008] In one embodiment, the end of the second slot insulating portion is provided with a second plug portion, which is used to cooperate with the first snap-fit ​​portion for connection. The thickness of the second plug portion is less than that of the second slot insulating portion, so that a second step surface that is easy to pry is formed between the second plug portion and the second slot insulating portion.

[0009] In one embodiment, the first slot insulating portion and the second slot insulating portion are disposed opposite to each other, the first slot insulating portion is used to correspond to the left half of the slot, and the second slot insulating portion is used to correspond to the right half of the slot, so that the first slot insulating portion and the second slot insulating portion are spliced ​​in the middle of the slot.

[0010] In one embodiment, the first slot insulating portion has a first splicing surface extending vertically, and the second slot insulating portion has a second splicing surface extending vertically. The first splicing surface and the second splicing surface are fitted together, and the first splicing surface forms an acute angle with the middle wall of the slot, while the second splicing surface forms an obtuse angle with the middle wall of the slot, so that the splicing points of the first slot insulating portion and the second slot insulating portion intersect each other.

[0011] In one embodiment, the first splicing surface is provided with a first splicing groove, and the second splicing surface is provided with a second splicing protrusion, the second splicing protrusion being inserted into the first splicing groove in the vertical direction.

[0012] The advantages of this application compared to the prior art are:

[0013] In this embodiment, the end of the first slot insulation portion is connected to the second snap-fit ​​portion. The second slot insulation portion extends from the second end face insulation portion to the first snap-fit ​​portion, so that the end of the second slot insulation portion is connected to the first snap-fit ​​portion. Thus, both the first and second slot insulation portions pass through the entire tooth groove along the axial direction of the stator core, that is, they extend from one end of the stator core to the other end. The first slot insulation portion is connected to the second snap-fit ​​portion at the second end face insulation portion, and the second slot insulation portion is connected to the first snap-fit ​​portion at the first end face insulation portion. In this way, the connection points between the first and second wire frames are located on both end faces of the stator core, rather than inside the tooth groove, which makes it easier for operators to observe and disassemble. It is possible to clearly observe whether the snap-fit ​​is in place, and it is easy to use tools to disassemble at the connection points, thereby reducing the difficulty of quality inspection and improving the convenience of disassembly and assembly. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the coil skeleton formed by splicing the first wire frame and the second wire frame together in an embodiment of this application;

[0016] Figure 2 for Figure 1 A three-dimensional structural diagram of the intermediate coil frame mounted on the stator core;

[0017] Figure 3 This is a schematic diagram of the first wire frame structure;

[0018] Figure 4 This is a schematic diagram of the second wire frame structure;

[0019] Figure 5 This is a schematic diagram of the stator core structure;

[0020] Figure 6 for Figure 1 The structural diagram of the first wire frame is omitted.

[0021] Figure 7This is a top-view planar structural diagram of the joint between the first and second slot insulation sections. Detailed Implementation

[0022] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0025] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0026] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0027] Please refer to Figure 2 This application provides a coil frame for an automotive generator, comprising a first wire frame 100 and a second wire frame 200. The first wire frame 100 and the second wire frame 200 are respectively spliced ​​from opposite sides of the axial direction of the stator core 300 to form the coil frame. For example, the first wire frame 100 moves downward from the upper side of the axial direction of the stator core 300 and inserts into the stator core 300, while the second wire frame 200 moves upward from the lower side of the axial direction of the stator core 300 and inserts into the stator core 300. The first wire frame 100 and the second wire frame 200 move towards each other until they are spliced ​​together, thus forming the coil frame. Figure 5 A stator core 300 is shown, having upper and lower end faces, with grooves 310 formed between its stator teeth. For ease of description, the axial direction of the stator core 300 is defined as vertical.

[0028] Please refer to Figure 1The difference between this embodiment and the prior art is that the first wire frame 100 includes a first end face insulation portion 110, a first slot insulation portion 120, and a first snap-fit ​​portion 130. The first slot insulation portion 120 and the first snap-fit ​​portion 130 are both disposed on the first end face insulation portion 110. The second wire frame 200 includes a second end face insulation portion 210, a second slot insulation portion 220, and a second snap-fit ​​portion 230. The second slot insulation portion 220 and the second snap-fit ​​portion 230 are both disposed on the second end face insulation portion 210. The first end face insulation portion 110 and the second end face insulation portion 210 are respectively used to abut against the two end faces of the stator core 300 to provide end face insulation for the stator core 300. The first slot insulation portion 120 and the second slot insulation portion 220 are both used to extend into the slots 310 of the stator core 300 to provide slot insulation for the slots 310. Furthermore, the first snap-fit ​​portion 130 is disposed corresponding to the second slot insulation portion 220, and the second snap-fit ​​portion 230 is disposed corresponding to the first slot insulation portion 120. Therefore, when the first wire frame 100 and the second wire frame 200 are in a state of mutual splicing, the first slot insulation portion 120 extends from the first end face insulation portion 110 to the second snap-fit ​​portion 230, so that the end of the first slot insulation portion 120 is engaged with the second snap-fit ​​portion 230. The second slot insulation portion 220 extends from the second end face insulation portion 210 to the first snap-fit ​​portion 130, so that the end of the second slot insulation portion 220 is engaged with the first snap-fit ​​portion 130. In this way, the first slot insulation portion 120 and the second slot insulation portion 230 are engaged. All parts 220 pass through the entire toothed groove 310 along the axial direction of the stator core 300, that is, they extend from one end of the stator core 300 to the other end. This allows the first groove insulating part 120 to engage with the second snap-fit ​​part 230 at the second end face insulating part 210, and the second groove insulating part 220 to engage with the first snap-fit ​​part 130 at the first end face insulating part 110. In this way, the engagement connection between the first wire frame 100 and the second wire frame 200 is located on both end faces of the stator core 300, rather than inside the toothed groove 310. This makes it easier for operators to observe and disassemble, allowing them to clearly see whether the engagement is in place and to easily disassemble at the engagement connection using tools. This reduces the difficulty of quality inspection and improves the ease of disassembly and assembly.

[0029] Therefore, in this embodiment, the first slot insulation portion 120 and the second slot insulation portion 220 are spliced ​​left and right, rather than being spliced ​​vertically as in the prior art. The first slot insulation portion 120 and the second slot insulation portion 220 located in the same slot 310 are spliced ​​left and right to jointly shield the slot 310 and provide slot insulation for the slot 310. It should be noted that since the stator core 300 has multiple slots 310, the first wire frame 100 has a corresponding number of first slot insulation portions 120, and the second wire frame 200 also has a corresponding number of second slot insulation portions 220. The first slot insulation portions 120 and the second slot insulation portions 220 extending into the same slot 310 form a group and are spliced ​​left and right to shield the wall of the slot 310, thereby achieving slot insulation.

[0030] Please refer to Figure 3 and Figure 4 Furthermore, in this embodiment of the application, the first snap-fit ​​portion 130 and the second snap-fit ​​portion 230 are preferably groove structures, the first groove insulating portion 120 is inserted into the second snap-fit ​​portion 230, and the second groove insulating portion 220 is inserted into the first snap-fit ​​portion 130. In this way, the connection structure is simple, reducing the production and manufacturing cost and reducing the installation difficulty. Installation can be achieved by simply plugging them into each other without any other actions.

[0031] Furthermore, in a preferred embodiment of this application, the first slot insulating portion 120 is provided with a first plug-in portion 121 at its end. The first plug-in portion 121 is used to cooperate with the second snap-fit ​​portion 230. The thickness of the first plug-in portion 121 is less than that of the first slot insulating portion 120, so that a first step surface 122 that is easy to pry is formed between the first plug-in portion 121 and the first slot insulating portion 120. When the first slot insulating part 120 and the second snap-fit ​​part 230 are engaged, only the first insertion part 121 at the end of the first slot insulating part 120 extends into the second snap-fit ​​part 230 to achieve insertion engagement, while the body of the first slot insulating part 120 is outside the first insertion part 121. The first stepped surface 122 formed between the first insertion part 121 and the first slot insulating part 120 due to the thickness difference abuts against the side of the second end face insulating part 210. When disassembly is required, a tool (such as a pry bar) can be inserted into the contact point between the first stepped surface 122 and the second end face insulating part 210 to pry it, so that the first insertion part 121 of the first slot insulating part 120 disengages from the second snap-fit ​​part 230 on the second end face insulating part 210, saving time and effort. Similarly, it is further preferable that the end of the second slot insulating portion 220 is provided with a second plug portion 221, the second plug portion 221 is used to cooperate with the first snap-fit ​​portion 130, and the thickness of the second plug portion 221 is less than that of the second slot insulating portion 220, so that a second step surface 222 that is easy to pry is formed between the second plug portion 221 and the second slot insulating portion 220.

[0032] In this embodiment, the first slot insulating portion 120 and the second slot insulating portion 220, located in the same tooth groove 310, are joined left and right to achieve complete shielding of the inner wall of the tooth groove 310. Specifically, in this embodiment, the first slot insulating portion 120 and the second slot insulating portion 220 are preferably arranged opposite to each other, with the first slot insulating portion 120 corresponding to the left half of the tooth groove 310 and the second slot insulating portion 220 corresponding to the right half of the tooth groove 310, so that the first slot insulating portion 120 and the second slot insulating portion 220 are joined in the middle of the tooth groove 310. In this way, both the first slot insulating portion 120 and the second slot insulating portion 220 only need to be formed into the shape of half of the tooth groove 310, reducing the difficulty of processing and manufacturing, and reducing the difficulty of inserting them into the tooth groove 310, further improving installation convenience. Please refer to... Figure 6 This is a schematic diagram with the first wire frame 100 omitted.

[0033] Please refer to Figure 7 Furthermore, in this embodiment of the application, the first slot insulating portion 120 preferably has a vertically extending first splicing surface 123, and the second slot insulating portion 220 preferably has a vertically extending second splicing surface 223. The first splicing surface 123 and the second splicing surface 223 are fitted together, and the first splicing surface 123 forms an acute angle with the middle wall of the tooth groove 310, while the second splicing surface 223 forms an obtuse angle with the middle wall of the tooth groove 310, so that the splicing points of the first slot insulating portion 120 and the second slot insulating portion 220 are staggered. In this way, neither the first splicing surface 123 nor the second splicing surface 223 is perpendicular to the middle wall of the tooth groove 310, but is inclined so that the first slot insulating portion 120 and the second slot insulating portion 220 interlock, which improves the splicing firmness of the first slot insulating portion 120 and the second slot insulating portion 220, and also enhances the shielding effect on the wall of the tooth groove 310, thereby improving the insulation effect of the tooth groove 310. If the first splicing surface 123 and the second splicing surface 223 are both perpendicular to the middle wall of the tooth groove 310, the gap between them may cause leakage, resulting in poor insulation. However, the first splicing surface 123 and the second splicing surface 223 are inclined relative to the middle wall of the tooth groove 310, which makes the contact points that fit together inclined. The gap at the contact point is inclined, so that the coil cannot pass through the gap directly to the middle wall of the tooth groove 310. That is, it can be blocked by the interlocking structure of the first groove insulation part 120 and the second groove insulation part 220, thereby avoiding the consequence of leakage at the contact point.

[0034] Furthermore, in a preferred embodiment of this application, the first splicing surface 123 is provided with a first splicing groove, and the second splicing surface 223 is provided with a second splicing protrusion, the second splicing protrusion being inserted into the first splicing groove in the vertical direction. When the first wire frame 100 and the second wire frame 200 move towards each other to achieve insertion and engagement, the first slot insulation part 120 and the second slot insulation part 220 move alternately. During this process, the first splicing surface 123 and the second splicing surface 223 also move alternately. The first splicing protrusion is continuously inserted into the first splicing slot. When the first wire frame 100 and the second wire frame 200 move to the point where they are spliced ​​together, the first splicing surface 123 and the second splicing surface 223 are completely in contact, and the first splicing protrusion is fully inserted into the first splicing slot. On the one hand, this further improves the fit between the first splicing surface 123 and the second splicing surface 223, that is, it improves the splicing firmness between the first slot insulation part 120 and the second slot insulation part 220, thereby improving the reliability of the coil frame. On the other hand, it further improves the splicing sealing degree between the first splicing surface 123 and the second splicing surface 223, reduces the risk of leakage, and improves the insulation effect.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A coil frame for an automotive generator, comprising a first wire frame and a second wire frame, characterized in that, The first wire frame includes a first end face insulation portion, a first slot insulation portion, and a first snap-fit ​​portion. The first slot insulation portion and the first snap-fit ​​portion are both disposed on the first end face insulation portion. The second wire frame includes a second end face insulation portion, a second slot insulation portion, and a second snap-fit ​​portion. The second slot insulation portion and the second snap-fit ​​portion are both disposed on the second end face insulation portion. The first snap-fit ​​portion is disposed corresponding to the second slot insulation portion, and the second snap-fit ​​portion is disposed corresponding to the first slot insulation portion. The first slot insulation portion extends from the first end face insulation portion to the second snap-fit ​​portion, and the second slot insulation portion extends from the second end face insulation portion to the first snap-fit ​​portion. The first slot insulation portion and the second slot insulation portion are joined together from left to right to jointly cover the tooth slot.

2. The coil frame for an automotive generator according to claim 1, characterized in that, The first snap-fit ​​portion and the second snap-fit ​​portion are groove structures. The first groove insulating portion is inserted into the second snap-fit ​​portion, and the second groove insulating portion is inserted into the first snap-fit ​​portion.

3. The coil frame for an automotive generator according to claim 2, characterized in that, The first slot insulation portion has a first plug-in portion at its end, which is used to connect with the second snap-fit ​​portion. The thickness of the first plug-in portion is less than that of the first slot insulation portion, so that a first step surface that is easy to pry is formed between the first plug-in portion and the first slot insulation portion.

4. The coil frame for an automotive generator according to claim 2, characterized in that, The second slot insulating part has a second plug-in part at its end. The second plug-in part is used to connect with the first snap-fit ​​part. The thickness of the second plug-in part is less than that of the second slot insulating part, so that a second step surface that is easy to pry is formed between the second plug-in part and the second slot insulating part.

5. The coil frame for an automotive generator according to claim 1, characterized in that, The first slot insulating part and the second slot insulating part are disposed opposite to each other. The first slot insulating part is used to correspond to the left half of the slot, and the second slot insulating part is used to correspond to the right half of the slot, so that the first slot insulating part and the second slot insulating part are spliced ​​in the middle of the slot.

6. A coil frame for an automotive generator according to claim 5, characterized in that, The first slot insulation portion has a first splicing surface extending vertically, and the second slot insulation portion has a second splicing surface extending vertically. The first splicing surface and the second splicing surface are fitted together, and the first splicing surface forms an acute angle with the middle wall of the slot, while the second splicing surface forms an obtuse angle with the middle wall of the slot, so that the splicing points of the first slot insulation portion and the second slot insulation portion intersect each other.

7. A coil frame for an automotive generator according to claim 6, characterized in that, The first splicing surface is provided with a first splicing groove, and the second splicing surface is provided with a second splicing protrusion, which is inserted into the first splicing groove in the vertical direction.

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