Winding mold suitable for small-span pole coil

Abstract

A winding mold suitable for a small-span pole coil comprises a base, a first winding column and a second winding column are connected to the base, the second winding column can rotate around the axis of the second winding column, the first winding column is connected with a first winding partition plate, and the second winding column is connected with a second winding partition plate. The maximum width L1 of the first winding partition plate and the maximum width L2 of the second winding partition plate are both not larger than the span of the pole coil. According to the winding mold, the first winding column and the first winding partition plate are used for supporting and forming the arc-shaped end portion of the coil, the second winding column and the second winding partition plate are used for conducting auxiliary supporting on the adjacent position of the arc-shaped end portion of the coil, and lamination collapse in the coil winding process can be prevented. The second winding column can rotate, and after winding is completed, the second winding column can be rotated, so that the second winding partition plate is separated from the coil lamination, and demolding of the whole mold is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of motor manufacturing equipment, in particular to a winding die suitable for small-span magnetic pole coils. Background Art

[0002] During the motor manufacturing process, the stator coil or rotor coil is wound with a wire. The motor coil is generally wound in a flat winding method or a stacked winding method. The winding bend of the coil in the flat winding method is along the thickness direction of the wire, while the winding bend of the coil in the flat winding method is along the width direction of the wire. Figure 1 The pole coils of a motor shown here are stacked, requiring the use of a dedicated winding mold. Multiple partitions are typically inserted into the winding mold, with each layer of wire nested between adjacent partitions to form a stacked, annular pole coil. The coils are long, but the span (the width of the annular space within the annular pole coil) is typically small. When the coils are tightly wound, the winding mold experiences significant tension, requiring a certain level of structural strength. Furthermore, after winding, the partitions become wedged into the coil stack, making demolding difficult. Conventional methods require the removal of each partition, resulting in a cumbersome demolding process.

[0003] A search revealed that relevant technical literature on winding molds is available in the prior art. For example, the invention patent publication number is "CN110034646A," and its title is "Magnetic Pole Coil Winding Mold and Winding Method Using the Same." A magnetic pole coil winding mold and a winding method using the same are disclosed, comprising: a rear mold, a front mold, an unwinding clamping plate assembly, and an unwinding disc. The rear mold comprises a rear mold stop plate and a wedge-shaped rear mold core that are formed in a continuous manner; the front mold comprises a front mold stop plate and a wedge-shaped front mold core that are formed in a continuous manner; the inclined surface of the wedge-shaped rear mold core is adapted to mate with the inclined surface of the wedge-shaped front mold core so that the wedge-shaped rear mold core and the wedge-shaped front mold core are combined to form a winding mold core suitable for winding electromagnetic wire; the front mold stop plate is adapted to be arranged relative to the rear mold stop plate, and a space is formed between the rear mold stop plate and the front mold stop plate for combining the wedge-shaped rear mold core and the wedge-shaped front mold core; and the unwinding clamping plate assembly comprises a pair of opposing turn clamps. This comparative document aims to improve the compactness of the pole coil after winding, but does not provide a corresponding technical solution for demolding after winding.

[0004] For example, the utility model authorization announcement document with the publication number "CN221081126U" and the name "A winding mold that is adjustable and easy to install" is disclosed. A winding mold that is adjustable and easy to install is disclosed, including a mold body, a winding post, a top block, a bottom plate, a stretching rod, a guardrail, a mounting plate and a fixed structure. The mold body includes a winding post, and the winding post is divided into two. The tops of the two winding posts are each provided with a top block, and the bottoms of the two winding posts are provided with a bottom plate. A stretching rod is connected between the two winding posts, and guardrails are installed on both sides above the bottom plate. The four side edges of the outer wall of the winding post are fixedly installed with mounting plates, and a fixed structure is provided above the mounting plate. The winding mold involved in this comparative document can adjust the mold size by setting a stretching rod between the two winding posts, thereby realizing the winding of coils of different sizes. It does not provide a corresponding technical solution for demolding after winding.

[0005] Therefore, it is of great significance to propose a winding mold that is easy to demould and applicable to small-span magnetic pole coils in this field. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the utility model provides a winding mold suitable for small-span magnetic pole coils, which includes a base, to which a first winding post and a second winding post are connected, the second winding post can rotate around its own axis, the first winding post is connected to a first winding partition, and the second winding post is connected to a second winding partition, and the maximum width L1 of the first winding partition and the maximum width L2 of the second winding partition are not greater than the span of the magnetic pole coil.

[0007] Furthermore, the second winding post and the base are connected via a transverse movement mechanism.

[0008] Furthermore, a frame bracket is vertically connected to the base, a side column of the frame bracket is the first winding column, and one end of the second winding column is rotatably connected to the top beam of the frame bracket and the other end is rotatably connected to the ground beam of the frame bracket.

[0009] Furthermore, waist holes are provided on the top beam and the ground beam, the second winding column is coaxially sleeved with the rotating shaft, and the rotating shaft can be located in the waist holes and move laterally.

[0010] Furthermore, one end of the rotating shaft passes through the waist hole on the top beam and is connected to the handle.

[0011] Furthermore, the width of the first winding partition increases gradually from the top end to the bottom end of the first winding column.

[0012] Furthermore, the second winding post is provided with second grooves opposite to each other, the second winding partition is embedded in the second grooves and provided with second circular holes, and the second round pin runs through all the second grooves and second circular holes starting from the top of the second winding post.

[0013] Furthermore, a first groove is formed on one side column of the frame-type bracket, a first winding partition is embedded in the first groove and a first round hole is formed, and a first round pin starts from the top of one side column of the frame-type bracket and passes through all the first grooves and the first round holes.

[0014] Furthermore, the base has a boss, a third groove is formed on the boss, and the frame-shaped bracket is embedded in the third groove.

[0015] Furthermore, a guide block is connected to one side of the boss on the base.

[0016] Compared with the existing technology, the technical solution of the present application has the following beneficial effects: the winding mold proposed in the present invention uses the first winding column and the first winding partition to support and form the arc-shaped end of the coil, and uses the second winding column and the second winding partition to provide auxiliary support for the adjacent parts of the arc-shaped end of the coil, which can prevent the collapse of the stacking during the coil winding process.

[0017] The first winding post and the second winding post cooperate to withstand the large tensile force during the coil winding process, so that the mold has a certain structural strength. The two winding posts can be completely accommodated in the annular space of the coil, and the winding can be completed when the coil span is small.

[0018] The second winding post can be rotated. After the winding is completed, the second winding post can be rotated to make the second winding partition come out of the coil stack, thereby facilitating the demoulding of the entire mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Schematic diagram of the structure of the magnetic pole coil;

[0020] Figure 2 : Mould usage status diagram;

[0021] Figure 3 : Schematic diagram of the mold structure during winding;

[0022] Figure 4 : Schematic diagram of the mold structure during demoulding;

[0023] Figure 5 : Mould side view;

[0024] Figure 6 : Top view of the mold;

[0025] Figure 7 : Schematic diagram of the mold frame bracket structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] A winding mold suitable for a small-span magnetic pole coil includes a base 1, to which a first winding post 2 and a second winding post 3 are connected. The second winding post 3 can rotate around its own axis. The first winding post 2 is connected to a first winding partition 21, and the second winding post 3 is connected to a second winding partition 31. The maximum width L1 of the first winding partition 21 and the maximum width L2 of the second winding partition 31 are not greater than the span of the magnetic pole coil.

[0028] In this embodiment, if Figure 3 and Figure 6 As shown. One end of the first winding partition 21 plugged into the first winding post 2 is arc-shaped, and is used to support the stacking of the arc-shaped ends of the pole coils, and its maximum width L1 is not greater than the span of the pole coils. The second winding partition 31 plugged into the second winding post 3 is used to support the stacking of the arc-shaped ends of the pole coils and the adjacent areas of the straight segments, and its maximum width L2 is not greater than the span of the pole coils. When the coil is wound, the second winding partition 31 on the second winding post 3 is perpendicular to the length direction of the coil, and can complete the winding of the entire coil in conjunction with the first winding post 2 and the first winding partition 21. After the winding is completed, the second winding post 3 is rotated ninety degrees so that the second winding partition 31 is completely removed from the coil stack, because the maximum width L1 of the entire first winding partition 21 is also less than the span of the pole coil. At this time, the mold can be moved along the length direction of the coil so that the first winding partition 21 is also removed from the arc-shaped end stack of the pole coil. At this time, the first winding partition 21 and the second winding partition 31 are both separated from the coil in the annular space of the coil, and then the entire mold can be demolded and separated from the annular space of the pole coil.

[0029] In a more preferred embodiment, the second winding post 3 and the base 1 are connected by a transverse movement mechanism. When the coil is wound, the second winding partition 31 is perpendicular to the length direction of the coil. In order to ensure that the laminated structure of the arc end and the adjacent area of ​​the straight segment of the magnetic pole coil is firmly supported, the second winding partition 31 is wider than the span of the coil when it is perpendicular to the length direction of the coil, that is, the end of the second winding partition 31 will extend beyond the edge of the straight segment of the coil. If the second winding post 3 needs to be rotated for demoulding, in order to prevent the second winding partition 31 from interfering with the first winding post 2, the second winding post 3 can generally be set away from the first winding post 2, but the support area of ​​the coil by the second winding partition 31 will be far away from the arc end of the coil. When the coil is wound, there will be a relatively long unsupported section from the second winding partition 31 to the first winding partition 21. Since the coil is bent at the arc end, this unsupported section is too long, which will cause the coil laminate to collapse during the bending process and cannot be properly embedded in the gap of the first winding partition 21. To address this technical issue, in this embodiment, the second winding post 3 and base 1 are connected by a transverse mechanism. During winding, the second winding post 3 can be positioned as close to the first winding post 2 as possible, shortening the unsupported section and preventing coil stack collapse. After winding is complete, the transverse mechanism retracts the second winding post 3 a certain distance before rotating it, still preventing interference between the second winding partition 31 and the first winding post 2 during the demolding process. This transverse mechanism can employ a common structure, such as a guide rail and slider mechanism.

[0030] In a more preferred embodiment, the base 1 is vertically connected to the frame bracket 4, one side column of the frame bracket 4 is the first winding column 2, and one end of the second winding column 3 is rotatably connected to the top beam 41 of the frame bracket 4 and the other end is rotatably connected to the ground beam 42 of the frame bracket 4. Figure 7 The frame bracket 4 has a side column for receiving the first winding spacer 21, while the second winding column 3 is connected in the middle of the frame bracket 4. The frame bracket 4 provides structural support for the two winding columns, strengthening the mold's structural strength and resisting the tensile forces of coil winding. The frame bracket 4 is also flat and can be completely accommodated within the annular space of the coil. This ensures reliable structural strength even when the coil span is small.

[0031] In a more preferred embodiment, waist holes 43 are formed on both the top beam 41 and the ground beam 42. The second winding post 3 is coaxially sleeved with the rotating shaft 32, and the rotating shaft 32 can be located in the waist holes 43 and move laterally. The waist holes 43 allow the second winding post 3 to move laterally on the top beam 41 and the ground beam 42. As mentioned above, the second winding post 3 can also rotate between the two side columns.

[0032] In a more preferred embodiment, one end of the rotating shaft 32 passes through the waist hole 43 on the top beam 41 and is connected to the handle 33. The handle 33 facilitates the lateral movement and rotation of the second winding post 3. In this embodiment, a locking nut is further provided between the handle 33 and the rotating shaft 32.

[0033] In a more preferred embodiment, the width of the first winding spacer 21 increases gradually from the top to the bottom of the first winding post 2. When the coil reaches a certain thickness, since the first winding spacer 21 is fixed, the width of the first winding spacer 21 decreases gradually to reduce friction between it and the coil, facilitating subsequent demolding.

[0034] like Figure 7 As shown. The second winding post 3 has a second groove 34 formed opposite to it, the second winding partition 31 is embedded in the second groove 34 and has a second circular hole 311 formed therein, and the second round pin 35 passes through all the second grooves 34 and the second circular hole 311 starting from the top of the second winding post 3. A first groove 22 is formed on one side column of the frame-type bracket 4, the first winding partition 21 is embedded in the first groove 22 and has a first circular hole 211 formed therein, and the first round pin 23 passes through all the first grooves 22 and the first circular hole 211 starting from the top of one side column of the frame-type bracket 4. After the partition is embedded in the groove and fixed by the round pin, the structure is firm and will not loosen. In particular, when the second winding post 3 is rotated, the second winding partition 31 will rotate accordingly and will not be misaligned.

[0035] In a more preferred embodiment, the base 1 has a boss 11 with a third groove 12 defined therein, into which the frame bracket 4 is embedded. The boss 11 not only strengthens the structural strength of the base 1 but also provides auxiliary support for the bottom of the coil. The embedded installation of the frame bracket 4 ensures a secure structure and facilitates assembly.

[0036] In a more preferred embodiment, a guide block 13 is further connected to one side of the boss 11 on the base 1 .

[0037] like Figure 2 As shown, the mold is set in pairs when used. The mold on the right is in the normal winding state. At this time, the second winding post 3 connected to the frame bracket 4 is close to the side column of the frame bracket 4 using the waist hole 43, and the second winding partition 31 is set perpendicular to the length direction of the coil. When the winding is completed, the second winding post 3 is first retracted from the waist hole 43, and then the second winding post 3 is rotated. The mold on the left side of the figure is in the demoulding state. It can be seen that the second winding partition 31 is completely separated from the coil stack after rotation. At this time, the molds at both ends can be brought closer to each other, so that the first winding partition (21) is also separated from the end of the coil, and then the mold can be completely demoulded without removing each partition.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding die suitable for small-span magnetic pole coils, characterized in that: The invention comprises a base (1), a first winding post (2) and a second winding post (3) are connected to the base (1), the second winding post (3) can rotate around its own axis, the first winding post (2) is connected to a first winding partition (21), the second winding post (3) is connected to a second winding partition (31), and the maximum width L1 of the first winding partition (21) and the maximum width L2 of the second winding partition (31) are not greater than the span of the magnetic pole coil.

2. The winding die for a small-span magnetic pole coil according to claim 1, wherein: The second winding column (3) and the base (1) are connected via a transverse movement mechanism.

3. The winding die for a small-span magnetic pole coil according to claim 2, wherein: The base (1) is vertically connected to a frame-type bracket (4), a side column of the frame-type bracket (4) is a first winding column (2), and one end of the second winding column (3) is rotatably connected to a top beam (41) of the frame-type bracket (4), and the other end is rotatably connected to a ground beam (42) of the frame-type bracket (4).

4. The winding die for a small-span magnetic pole coil according to claim 3, wherein: The top beam (41) and the ground beam (42) are both provided with waist holes (43), the second winding column (3) is coaxially sleeved with the rotating shaft (32), and the rotating shaft (32) can be located in the waist holes (43) and move laterally.

5. The winding die for a small-span magnetic pole coil according to claim 4, characterized in that: One end of the rotating shaft (32) passes through the waist hole (43) on the top beam (41) and is connected to the handle (33).

6. The winding die for a small-span magnetic pole coil according to claim 1, wherein: The width of the first winding partition (21) increases sequentially from the top end to the bottom end of the first winding column (2).

7. The winding die for a small-span magnetic pole coil according to claim 4, characterized in that: The second winding post (3) has second grooves (34) formed opposite to each other, the second winding partition (31) is embedded in the second grooves (34) and has second circular holes (311), and the second round pin (35) starts from the top of the second winding post (3) and passes through all the second grooves (34) and the second circular holes (311).

8. The winding die for a small-span magnetic pole coil according to claim 4, wherein: A first groove (22) is formed on a side column of the frame-shaped bracket (4); a first winding partition (21) is embedded in the first groove (22) and forms a first circular hole (211); and a first round pin (23) starts from the top of the side column of the frame-shaped bracket (4) and penetrates all the first grooves (22) and the first circular hole (211).

9. The winding die for a small-span magnetic pole coil according to claim 4, wherein: The base (1) has a boss (11), a third groove (12) is formed on the boss (11), and the frame-shaped bracket (4) is embedded in the third groove (12).

10. The winding die for a small-span magnetic pole coil according to claim 9, characterized in that: A guide block (13) is also connected to one side of the boss (11) on the base (1).

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