Winding mold of circular coil

Abstract

The invention relates to a winding mold of a circular coil, which comprises a left mold unit and a right mold unit, the left mold unit comprises a connecting sleeve, a left mold plate and a mold core, the connecting sleeve is fixedly connected with the left mold plate, the mold core is integrally of a cylindrical structure, and a conical groove is formed in the center of the cylindrical structure; the mold core is divided into a plurality of fan-shaped sub-cores through the conical grooves, all the sub-cores are movably connected to the left mold plate, and every two adjacent sub-cores are connected through a spring. The right mold unit comprises a top core and a right mold plate which are connected with each other, the top core extends out of the center of the right mold plate, and a conical head used for pushing each sub-core to open outwards through the conical groove of the mold core is arranged at the top of the top core. Compared with the prior art, the mold has the advantages of simple structure, convenience and reliability in use, high practicability, high demolding efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the field of winding structures, and particularly to a winding die for a circular coil. Background Art

[0002] During the manufacturing process of an electric motor, the stator coil needs to be first wound on a formed die, and after winding, it needs to be demolded to obtain the wound coil.

[0003] For the existing coil winder and demolding structure, reference can be made to a demolding device for a telescopic winding die of a transformer disclosed in the invention with the publication number CN114068172A, which includes a telescopic winding die, a winding die tilting and rotating mechanism, a tilting mechanism and a demolding mechanism. Winding die tilting and rotating mechanisms are arranged on the ground at both ends of the telescopic winding die. The telescopic winding die is clamped into the winding die tilting and rotating mechanism, and the telescopic winding die is deflected by the winding die tilting and rotating mechanism, so as to change the horizontally placed telescopic winding die into a vertically arranged one. The bottom of one of the winding die tilting and rotating mechanisms is hinged to the ground, and a tilting mechanism is arranged between the winding die tilting and rotating mechanism and the ground; there is no need for workers to rotate the telescopic winding die, which reduces the operation difficulty of workers and improves safety and production efficiency.

[0004] Most of the existing above-mentioned solutions regard the winding die and the demolding mechanism as two components. During demolding, it is necessary to take out the winding die wound with the coil and transfer it to the demolding mechanism for demolding, which is cumbersome and inconvenient to operate and affects the work efficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defect that the existing technology regards the winding die and the demolding mechanism as two components, which is cumbersome and inconvenient to operate and affects the work efficiency, and to provide a winding die for a circular coil.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A winding die for a circular coil includes a left die unit and a right die unit. The left die unit includes a connecting sleeve, a left template and a die core. The connecting sleeve is fixedly connected to the left template. The die core is of an overall cylindrical structure, and a tapered groove is provided at the center of the cylindrical structure; the die core is divided into a plurality of fan-shaped sub-cores through the tapered groove, and each sub-core is movably connected to the left template, and adjacent two sub-cores are connected to each other by springs;

[0008] The right die unit includes a top core and a right template which are connected to each other. The top core extends out through the center of the right template, and a tapered head for pushing each sub-core to expand outwards through the tapered groove of the die core is provided at the top of the top core.

[0009] Furthermore, circular connection holes are provided on each of the sub-cores, and each sub-core is connected to the left template by bolts. The diameter of the circular connection hole is larger than the diameter of the nut of the bolt, and each sub-core is movably connected to the left template along the corresponding circular connection hole.

[0010] Furthermore, spring installation grooves are provided between adjacent two of the sub-cores, and both ends of the spring between adjacent two sub-cores are respectively fixedly connected in the spring installation grooves of the two sub-cores.

[0011] Furthermore, the die core is evenly divided into three sector-shaped sub-cores by the tapered groove.

[0012] Furthermore, when the winding die is winding, the top core is located in the tapered groove of the die core and pushes each sub-core of the die core to expand outwards.

[0013] Furthermore, when the winding of the winding die is completed, the top core is located outside the tapered groove of the die core, and each sub-core of the die core gathers towards the middle under the pulling force of the spring, and the coil wound on the die core is demolded.

[0014] Furthermore, a first annular platform is provided on the outer side of the top core, and this first annular platform is connected to the right template by bolts.

[0015] Furthermore, a second annular platform is provided on the outer side of one end of the connecting sleeve close to the left template, and this second annular platform is connected to the left template by bolts.

[0016] Furthermore, a first driving rod is connected to one end of the connecting sleeve away from the left template, and a second driving rod is connected to one end of the top core away from the right template.

[0017] Furthermore, the inside of one end of the connecting sleeve away from the left template is hollow to form a first fixing groove, and the first driving rod is connected in this first fixing groove; the inside of one end of the top core away from the right template is hollow to form a second fixing groove, and the second driving rod is connected in this second fixing groove.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The present invention divides the winding die into left and right parts. The left die unit is provided with a die core, a tapered groove is provided in the middle of the die core and is divided into a plurality of sector-shaped sub-cores. Each sub-core can move within a small range within the corresponding circular connection hole, and adjacent two sub-cores are connected to each other by a spring; the tapered head of the top core of the right die unit can drive each sub-core to expand outwards, so as to wind the wire. After the winding is completed, the top core is taken out, and each sub-core gathers towards the middle under the driving of the spring contraction force, and the coil can be quickly demolded. This solution has a simple structure, is convenient and reliable to use, and has a high demolding efficiency.

[0020] (2) By setting the diameter of the circular connection hole to be larger than the diameter of the nut of the bolt, the present invention enables each sub-core to be movable within a certain range on the left template. Furthermore, by connecting each sub-core with a spring, a dynamic process of expansion under the pressure of the cone head and contraction and recovery after the cone head leaves is achieved. The overall structure is simple and reliable, and has high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a winding die for a circular coil provided in an embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of a winding die for a circular coil provided in an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the separated state of a winding die for a circular coil provided in an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of a die core provided in an embodiment of the present invention;

[0025] In the figure, 1, connecting sleeve; 2, left template; 3, die core; 301, tapered groove; 302, sub-core; 303, spring; 4, top core; 5, right template. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0031] Embodiment 1

[0032] As Figures 1-3 shown, this embodiment provides a winding die for a circular coil, including a left die unit and a right die unit. The left die unit includes a connecting sleeve 1, a left template 2, and a die core 3. The connecting sleeve 1 is fixedly connected to the left template 2. As Figure 4 shown, the die core 3 is integrally a cylindrical structure, and a tapered groove 301 is provided at the center of the cylindrical structure; the die core 3 is divided into a plurality of fan-shaped sub-cores 302 through the tapered groove 301, and each sub-core 302 is movably connected to the left template 2, and adjacent two sub-cores 302 are connected to each other through a spring 303;

[0033] The right die unit includes a top core 4 and a right template 5 that are connected to each other. The top core 4 extends out through the center of the right template 5, and a tapered head for pushing each sub-core 302 to expand outward through the tapered groove 301 of the die core 3 is provided at the top of the top core 4.

[0034] The connection structure in which each sub-core 302 is movably connected to the left template 2 is specifically:

[0035] Each sub-core 302 is provided with a circular connection hole, and each sub-core 302 is connected to the left template 2 through a bolt. The diameter of the circular connection hole is larger than the diameter of the nut of the bolt, and each sub-core 302 is movably connected to the left template 2 along the corresponding circular connection hole.

[0036] The installation structure of the spring 303 is specifically:

[0037] Spring installation grooves are correspondingly provided between adjacent two sub-cores 302, and both ends of the spring 303 between adjacent two sub-cores 302 are fixedly connected to the spring installation grooves of the two sub-cores 302 respectively.

[0038] In this embodiment, the mold core 3 is evenly divided into three fan-shaped sub-cores 302 through the tapered groove 301. Spring installation grooves are provided on both end faces of each sub-core 302. The two spring installation grooves of adjacent sub-cores 302 are opposite in position and located on the same straight line for installing the same spring 303.

[0039] When the winding die is winding, the top core 4 is located in the tapered groove 301 of the mold core 3 and pushes each sub-core 302 of the mold core 3 to expand outwards, as Figure 2 shown.

[0040] After the winding die finishes winding, the top core 4 is located outside the tapered groove 301 of the mold core 3. Each sub-core 302 of the mold core 3 gathers towards the middle under the pulling force of the spring 303, and the coil wound on the mold core 3 is demolded, as Figure 3 shown.

[0041] Regarding the connection method between the top core 4 and the right template 5, in this embodiment, a first annular platform is provided on the outer side of the top core 4, and the first annular platform is connected to the right template 5 by bolts.

[0042] Regarding the connection method between the connecting sleeve 1 and the left template 2, in this embodiment, a second annular platform is provided on the outer side of one end of the connecting sleeve 1 close to the left template 2, and the second annular platform is connected to the left template 2 by bolts.

[0043] The present invention divides the winding die into left and right parts. The left die unit is provided with a mold core 3. A tapered groove 301 is provided in the middle of the mold core 3 and is divided into multiple fan-shaped sub-cores 302. Each sub-core 302 can move within a small range within the corresponding circular connection hole. Adjacent two sub-cores 302 are connected to each other by a spring 303; the tapered head of the top core 4 in the right die unit can drive each sub-core 302 to expand outwards, so as to wind the wire. After winding is completed, the top core 4 is taken out, and each sub-core 302 gathers towards the middle under the driving of the contraction force of the spring 303, and the coil demolding can be quickly realized. This scheme has a simple structure and is convenient and reliable to use.

[0044] During the use of the above-mentioned winding die, an external driving part also needs to be connected to realize the winding drive. In this embodiment, a first driving rod is connected to one end of the connecting sleeve 1 away from the left template 2, and a second driving rod is connected to one end of the top core 4 away from the right template 5.

[0045] Specifically, the inside of one end of the connecting sleeve 1 away from the left template 2 is hollow to form a first fixing groove, and the first driving rod is connected in the first fixing groove; the inside of one end of the top core 4 away from the right template 5 is hollow to form a second fixing groove, and the second driving rod is connected in the second fixing groove.

[0046] Pin holes can also be provided on the sides of the first fixing groove and the second fixing groove to connect the corresponding driving rods through pins.

[0047] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. A winding die for a circular coil, characterized in that, It includes a left mold unit and a right mold unit. The left mold unit includes a connecting sleeve (1), a left template (2) and a mold core (3). The connecting sleeve (1) is fixedly connected to the left template (2). The mold core (3) is of an overall cylindrical structure, and a tapered groove (301) is provided at the center of this cylindrical structure. The mold core (3) is divided into a plurality of fan-shaped sub-cores (302) through the tapered groove (301). Each sub-core (302) is movably connected to the left template (2), and adjacent two sub-cores (302) are connected to each other by a spring (303). The right mold unit includes a core-pushing member (4) and a right template (5) which are connected to each other. The core-pushing member (4) extends out through the center of the right template (5), and a tapered head is provided at the top of the core-pushing member (4) for pushing each sub-core (302) to expand outwards through the tapered groove (301) of the mold core (3).

2. The winding die of a circular coil according to claim 1, characterized in that, Each of the sub-cores (302) is provided with a circular connecting hole, and each sub-core (302) is connected to the left template (2) by a bolt. The diameter of the circular connecting hole is larger than the diameter of the nut of the bolt, and each sub-core (302) is movably connected to the left template (2) along the corresponding circular connecting hole.

3. The winding die of a circular coil according to claim 1, characterized in that, A spring installation groove is provided between adjacent two sub-cores (302), and both ends of the spring (303) between adjacent two sub-cores (302) are respectively fixedly connected in the spring installation grooves of the two sub-cores (302).

4. A winding die for a circular coil according to claim 1, characterized in that, The mold core (3) is evenly divided into three fan-shaped sub-cores (302) through the tapered groove (301).

5. The winding die of a circular coil according to claim 1, wherein When the winding mold winds the wire, the core-pushing member (4) is located in the tapered groove (301) of the mold core (3) and pushes each sub-core (302) of the mold core (3) to expand outwards.

6. The winding die of a circular coil according to claim 5, wherein, After the winding mold finishes winding the wire, the core-pushing member (4) is located outside the tapered groove (301) of the mold core (3). Each sub-core (302) of the mold core (3) gathers towards the middle under the pulling force of the spring (303), and the coil wound on the mold core (3) is demolded.

7. A winding die for a circular coil according to claim 1, characterized in that, A first annular platform is provided on the outer side of the core-pushing member (4), and this first annular platform is connected to the right template (5) by a bolt.

8. The winding die of a circular coil according to claim 1, wherein A second annular platform is provided on the outer side of one end of the connecting sleeve (1) close to the left template (2), and this second annular platform is connected to the left template (2) by a bolt.

9. The winding die of a circular coil according to claim 1, wherein, A first driving rod is connected to the end of the connecting sleeve (1) far from the left template (2), and a second driving rod is connected to the end of the core-pushing member (4) far from the right template (5).

10. A winding die for a circular coil according to claim 9, characterized in that, The end of the connecting sleeve (1) far from the left template (2) is hollow inside to form a first fixing groove, and the first driving rod is connected in this first fixing groove; the end of the core-pushing member (4) far from the right template (5) is hollow inside to form a second fixing groove, and the second driving rod is connected in this second fixing groove.

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