Tool for assisting forming of annular coil

Abstract

The utility model discloses a tool for assisting forming of an annular coil, which comprises a winding former and a connecting bottom plate, the winding mold comprises a mold core, a lining and end plates, the mold core is of a cylindrical structure internally provided with a cross-shaped reinforcing rib, the lining is connected to the outer side of the mold core in a sleeving mode, the lining is matched with the mold core through an inclined face, the top face of the mold core and the surface of the cross-shaped reinforcing rib are provided with a clamping structure and a connecting bolt, and the annular end plates are fixed to the end faces of the two sides of the lining and the mold core. The end plate is limited by being matched with the clamping structure and is fixed on the outer side of the mold core through a fastener, and coil winding is carried out on the circumferential surface of the bushing; the connecting bottom plate is connected to the end plate through a fastener, the lathe clamps the connecting bottom plate in a lathe claw disc external clamping mode, and therefore the winding die is connected with the lathe. According to the utility model, the winding of a large-mass annular coil can be realized.

Description

Technical Field

[0001] The utility model relates to a tool for assisting in the forming of an annular coil in the field of coil production. Background Art

[0002] Since the number of turns of the motor coil is large and it needs to be neatly arranged to form a regular geometric shape, a winding mold is required for winding and forming. The existing winding technology is to fix one end of the coil start on the winding mold and rotate the winding mold through a winding vehicle for winding. After winding, the mold is taken for baking and curing to make the coil into one body.

[0003] The existing winding technology can only be used for winding rectangular coils or shuttle-shaped coils, and there are specifications for the produced coils, and large-quality coils cannot be produced. For coils with an annular shape and a large weight, the existing winding technology cannot be used for winding. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a tool for assisting in the forming of an annular coil, which can realize the winding of large-quality annular coils.

[0005] One technical solution to achieve the above purpose is: a tool for assisting in the forming of an annular coil, including a winding mold and a connecting bottom plate;

[0006] The winding mold includes a mold core, a bushing and end plates. The mold core is a cylindrical structure with a cross-shaped reinforcing rib inside. The bushing is sleeved outside the mold core, and the bushing and the mold core are matched by an inclined surface. A clamping structure and connecting bolts are arranged on the top surface of the mold core and the surface of the cross-shaped reinforcing rib. Annular end plates are fixed on both end faces of the bushing and the mold core. The end plates are limited by matching with the clamping structure and fixed on the outside of the mold core through fasteners. Coils are wound on the circumferential surface of the bushing;

[0007] The connecting bottom plate is connected to the end plate through fasteners, and the lathe clamps the connecting bottom plate by an external clamping method of the lathe chuck, so as to realize the connection between the winding mold and the lathe.

[0008] Further, two lead slots are opened on the outer circumferential surface of one side of the end plate. The starting section of the coil is clamped in one lead slot, and the ending section of the lead is clamped in the other lead slot.

[0009] Further, positioning blocks are arranged in the lead slots. The positioning blocks are clamped in the lead slots and fixed on the end plates through fasteners. The positioning blocks press the coils in the lead slots.

[0010] Further, a lifting hole for hoisting is opened on the end face of the bushing.

[0011] Further, the radius of the inner edge of the end plate is smaller than the radius of the mold core, and the radius of the outer edge of the end plate is larger than the radius of the bushing for winding the coil.

[0012] Further, hoisting grooves are provided at corresponding positions on the inner and outer edges of the end plate.

[0013] Further, a bakelite board is padded between the bushing and the coil.

[0014] A tool for assisting in the forming of an annular coil of the present utility model can be connected to a large lathe through a connecting base plate, so as to realize the winding of a large-quality annular coil, and the demolding operation is convenient and the production efficiency is high. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a tool for assisting in the forming of an annular coil of the present utility model. Detailed Embodiments

[0016] In order to better understand the technical solution of the present utility model, the following will be described in detail through specific embodiments:

[0017] Please refer to Figure 1 , a tool for assisting in the forming of an annular coil of the present utility model includes a winding mold and a connecting base plate.

[0018] The winding mold includes a mold core 1, a bushing 2, a front end plate 3 and a rear end plate 4.

[0019] The mold core 1 is a cylindrical structure with a cross-shaped reinforcing rib inside, so as to reduce the weight and facilitate hoisting. The bushing 2 is sleeved outside the mold core 1, and the bushing and the mold core are matched by an inclined surface, so that when the bushing 2 is lifted, part of the friction force is decomposed into a horizontal force, and the mold core 1 is more likely to be separated from the bushing under the action of gravity.

[0020] A clamping structure and connecting bolts are arranged on the top surface of the mold core 1 and the surface of the cross-shaped reinforcing rib. Annular front end plates 3 and rear end plates 4 are fixed to both end faces of the bushing and the mold core. The end plates are limited by matching with the clamping structure and fixed to both sides of the mold core through fasteners. The radius of the inner edge of the front end plate 3 and the rear end plate 4 is smaller than the radius of the mold core, and the radius of the outer edge is larger than the radius of the bushing for winding the coil. The outer edge is used to limit the winding height of the coil. At the same time, the outer edge of the end plate is marked with a 5-mm deep stop groove to indicate the end position of winding, which is convenient for winding. At the same time, during the hoisting and baking process, the movement of the coil is restricted so that it will not fall off the bushing. Hoisting holes for hoisting are provided on the end face of the bushing 2.

[0021] The coil is wound on the circumferential surface of the bushing. A phenolic board is padded between the bushing 2 and the coil. The lower limit dimension of the outer diameter of the bushing 2 is in line with the designed value of the lower limit dimension of the inner diameter of the coil, reserving a dimension for the phenolic board used for demolding. The upper limit dimension of the height of the bushing is in line with the designed value of the upper limit dimension of the height of the coil, ensuring that the height of the coil after gelling meets the design requirements. Two lead slots 5 are provided on the outer circumferential surface of the front end plate 3. The starting section of the coil is clamped in one lead slot 5, and the ending section of the lead is clamped in the other lead slot 5. A positioning block is arranged in the lead slot 5. The positioning block is clamped in the lead slot 5 and fixed to the front end plate 3 through fasteners. The positioning block presses the coil tightly in the lead slot 5, making the coil not easy to disperse during the winding process. Hoisting slots are provided at the corresponding positions of the inner edge and the outer edge of the inner side of the rear end plate 4, facilitating the insertion and fixation of the hoisting strap for hoisting.

[0022] The connecting bottom plate 6 is connected to the rear end plate 4 through fasteners. The lathe clamps the connecting bottom plate 6 by the outer clamping method of the lathe chuck, thereby realizing the connection between the winding die and the lathe.

[0023] When the coil is wound outside the bushing, a phenolic board is padded between the bushing and the coil. The lower limit dimension of the outer diameter of the bushing is in line with the designed value of the lower limit dimension of the inner diameter of the coil, reserving a dimension for the phenolic board used for demolding; the upper limit dimension of the height of the bushing is in line with the designed value of the upper limit dimension of the height of the coil, ensuring that the height of the coil after gelling meets the design requirements.

[0024] The method for winding the coil by using a tool for assisting the forming of an annular coil of the present utility model is as follows:

[0025] First, assemble the winding die, fix the connecting bottom plate on the rear end plate of the winding die, and clamp the connecting bottom plate through the lathe chuck to install the winding die on the lathe. When installing, attention should be paid to aligning the tension screw holes of the lathe chuck and the grooves of the lathe chuck.

[0026] Then, bend the starting ends of the five copper wires serving as the coil and lay them flat in the lead slots of the end plate. Install the positioning block to clamp the leads, and rotate the winding die to wind the copper wires evenly on the winding die. The ending part of the coil passes out from the other lead slot opening and is fixed with the positioning block.

[0027] After winding, tighten the hoop at the outer circle of the coil, and then bake and cure the winding die and the coil together. After the coil cools down, remove the front end plate, and use the hoist and sling to cooperate to take out the bushing.

[0028] After taking out the bushing, pass the binding strap through the coil and the rear end plate, clamp it in the hoisting slot of the rear end plate, and perform hoisting to separate it from the mold core, thereby realizing the separation of the coil.

[0029] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the substantial spirit of the present invention, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present invention.

Claims

1. A tool for assisting the forming of a toroidal coil, comprising a winding die, characterized in that: Also included is a connecting base plate; The winding die includes a die core, a bushing and an end plate. The die core is a cylindrical structure with a cross reinforcement rib inside. The bushing is sleeved on the outside of the die core. The bushing and the die core are matched with an inclined surface. A clamping structure and connecting bolts are provided on the top surface of the die core and the surface of the cross reinforcement rib. An annular end plate is fixed on both side end surfaces of the bushing and the die core. The end plate is limited by matching with the clamping structure and is fixed to the outside of the die core by fasteners. The coil is wound on the circumferential surface of the bushing. The connecting bottom plate is connected to the end plate through fasteners, and the lathe clamps the connecting bottom plate through the lathe claw plate external clamping method, thereby realizing the connection between the winding die and the lathe.

2. A tool for assisting the forming of an annular coil according to claim 1, characterized in that: Two lead wire grooves are arranged on the outer circumferential surface of the end plate on one side. The starting section of the coil is clamped in one lead wire groove, and the ending section of the lead wire is clamped in the other lead wire groove.

3. A tool for assisting the forming of an annular coil according to claim 2, characterized in that: A positioning block is arranged in the lead wire groove, the positioning block is clamped in the lead wire groove and fixed to the end plate through a fastener, and the positioning block presses the coil in the lead wire groove.

4. A tool for assisting the forming of an annular coil according to claim 1, characterized in that: A hoisting hole for hoisting is provided on the end surface of the bushing.

5. A tool for assisting the forming of an annular coil according to claim 1, characterized in that: The radius of the inner edge of the end plate is smaller than the radius of the mold core, and the radius of the outer edge of the end plate is larger than the radius of the bushing of the wound coil.

6. A tool for assisting the forming of an annular coil according to claim 5, characterized in that: Lifting grooves are provided at corresponding positions of the inner edge and the outer edge of the end plate.

7. A tool for assisting the forming of an annular coil according to claim 1, characterized in that: A bakelite board is placed between the bushing and the coil.

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