WO2023132408A1

WO2023132408A1 - Toroidal coil winding machine

Info

Publication number: WO2023132408A1
Application number: PCT/KR2022/004319
Authority: WO
Inventors: Young Hwan Son
Original assignee: Block9 Co., Ltd.
Priority date: 2022-01-06
Filing date: 2022-03-28
Publication date: 2023-07-13
Also published as: KR102590917B1; KR20230106279A

Abstract

A toroidal coil winding machine is disclosed. The toroidal coil winding machine includes a core rotating portion configured to rotate by a predetermined angle while supporting a toroidal core, an annular shuttle configured to rotate through a hollow of the toroidal core and wind a wire on the toroidal core, the annular shuttle being divided into two areas to selectively form a closed curve shape, a support frame configured to rotatably support the annular shuttle, and a rotating portion provided on one side of the two areas of the annular shuttle and configured to rotate a remaining second area with respect to a first area of the two areas.

Description

TOROIDAL COIL WINDING MACHINE

The present disclosure relates to a toroidal coil winding machine.

An inductor that generally suppresses a sudden change in current by inducing a voltage in proportion to an amount of change in current is one of the most important components of an electric circuit along with a resistor, a capacitor, an electron tube, a transistor, a power supply, etc.

These inductors are divided into an air core coil, a magnetic core coil, and a stratified iron cored coil according to a core structure of the coil. In particular, the magnetic core coil is divided into a solenoid in which a coil is wound on a rod-shaped magnetic core in a cylindrical shape, and a toroid in which a toroidal coil is wound on a ring-shaped magnetic core in a circular cylindrical shape.

The toroid is widely used as a filter for input power or an output filter for switching power because it can obtain a coil part with stable performance and efficiency, and is manufactured by winding a toroidal coil on a toroidal core. However, winding work was very difficult and inconvenient due to structural characteristics of the annular toroidal core, and various winding devices have been proposed to solve this inconvenience.

An example of a device for winding the toroidal coil on the toroidal core is disclosed in Korean Patent Nos. 10-0639706 and 10-1362333. Such a coil winding machine includes a coil winding bundle in which a coil winding portion for winding a coil on a core is rotatably mounted on a support, and the coil winding bundle includes an annular housing, a rotating ring, and an annular shuttle. One side of the coil winding bundle is opened so that the core can be disposed in its inner circle. The rotating ring is engaged with a driving gear to wind the coil on the core. The coil is wound and accommodated in the annular shuttle, and the annular shuttle rotates together along the rotating ring. In this instance, the annular shuttle rotates relative to the rotating ring so that the wound coil can be discharged smoothly during winding. For the winding operation, the rotating ring and the annular shuttle need to pass through a hollow of the core. Therefore, the rotating ring requires an opening/closing piece that is detachable from an opening, and the annular shuttle requires an opening/closing door. However, there is a problem that a detachment operation of the opening/closing piece and the opening/closing door is very cumbersome and takes a lot of time.

To solve the problem, there is a device disclosed in Korean Patent No. 10-2218671. Such a coil winding machine has a feature in which an annular shuttle and a rotating ring pass through a hollow of a core while an upper part of a support moves up and down with respect to a lower part of the support. However, since the support has no choice but to pass through the hollow of the core, there is a problem in that the core having the hollow with a small diameter cannot be wound.

When the opening/closing piece or the opening/closing door is rotatably manufactured so that the core can be positioned by easily opening and closing the rotating ring or the annular shuttle, a stress may be concentrated on a hinge, etc. In particular, since the rotating ring receives a strong compressive force in a circumferential direction to withdraw a coil wire rod from the annular shuttle and wind the wire on the core, there is a problem in that when there is a point where the stress is concentrated, it is easily damaged.

[Prior Art Document]

[Patent Document]

(Patent Document 1) Korean Patent No. 10-0639706

(Patent Document 2) Korean Patent No. 10-1362333

(Patent Document 3) Korean Patent No. 10-2218671

An embodiment of the present disclosure provides a toroidal coil winding machine capable of easily positioning a shuttle in a hollow of a core.

An embodiment of the present disclosure also provides a toroidal coil winding machine capable of winding a toroidal core having a hollow with a small diameter with a coil.

An embodiment of the present disclosure also provides a toroidal coil winding machine that does not damage a shuttle even when a strong compressive force is applied.

In order to solve the above-describe and other problem, in one aspect of the present disclosure, there is provided a toroidal coil winding machine comprising a core rotating portion configured to rotate by a predetermined angle while supporting a toroidal core; an annular shuttle configured to rotate through a hollow of the toroidal core and wind a wire on the toroidal core, the annular shuttle being divided into two areas to selectively form a closed curve shape; a support frame configured to rotatably support the annular shuttle; and a rotating portion provided on one sides of the two areas of the annular shuttle and configured to rotate a remaining second area with respect to a first area of the two areas.

The rotating portion may include a first rotating portion provided at one end of the first area; and a second rotating portion provided in the second area and hinge-coupled to the first rotating portion.

The toroidal coil winding machine may further comprise a fastening portion provided at other end of the first area and selectively fastened to the second rotating portion.

The fastening portion may include a fastening body; a pair of protrusions formed to protrude from one end of the fastening body and spaced apart from each other to face each other; a first groove formed to extend from an outer surface of the protrusion to a radial inside of the annular shuttle; and a second groove formed to extend from one end surface of the protrusion in a longitudinal direction of the annular shuttle. The second rotating portion may include an insertion portion inserted between the pair of protrusions; a stopper inserted into the first groove; and a catching portion slidably coupled to the insertion portion and selectively inserted into the second groove.

The annular shuttle may include an annular shuttle body; and a shuttle rib provided on an inner circumferential surface of the shuttle body and formed to extend in a circumferential direction of the annular shuttle, and the rotating portion may be provided on the shuttle body.

The annular shuttle may further include a loading shuttle in which the wire is wound and accommodated; and a winding shuttle configured to pull and withdraw the wire from the loading shuttle at a predetermined tension and then wind the wire on the toroidal core.

An outer circumferential surface of the winding shuttle may be tooth-coupled to a power transmission gear transmitting a rotational force, and an inner circumferential surface of the loading shuttle may be tooth-coupled to a tension control gear controlling a magnitude of the tension.

The winding shuttle may include a first winding curved portion belonging to the first area; and a second winding curved portion belonging to the second area. The rotating portion may include a first rotating portion provided on the first winding curved portion; and a second rotating portion that is provided on the second winding curved portion and is hinge-coupled to the first rotating portion so that the winding shuttle is selectively opened and closed.

The loading shuttle may include a first loading curved portion belonging to the first area; and a second loading curved portion belonging to the second area, and the second loading curved portion may be hinge-coupled to the first loading curved portion.

As described above, embodiments of the present disclosure have the following effects.

First, an embodiment of the present disclosure provides an effect capable of easily disposing a shuttle in a hollow of a core.

Second, an embodiment of the present disclosure also provides an effect capable of winding a toroidal core having a hollow with a small diameter with a coil.

Third, an embodiment of the present disclosure also provides an effect in which a shuttle is not damaged even when a strong compressive force is applied.

FIG. 1 is a perspective view illustrating a toroidal coil winding machine according to an embodiment of the present disclosure.

FIG. 2 is a side view illustrating a support frame and an annular shuttle of a toroidal coil winding machine illustrated in FIG. 1.

FIG. 3a is a side view illustrating a loading shuttle.

FIG. 3b is an enlarged view of a second area illustrated in FIG. 3a.

FIG. 3c is a cross-sectional view taken along E-E of FIG. 3a.

FIG. 4a is a side view illustrating a winding shuttle.

FIG. 4b is an enlarged view of a second area illustrated in FIG. 4a.

FIG. 4c is a cross-sectional view taken along D-D of FIG. 4a.

FIG. 5 is a perspective view illustrating a second rotating portion.

FIG. 6 is a perspective view illustrating a first rotating portion.

FIG. 7 is a perspective view illustrating a fastening portion.

FIG. 8 is a perspective view illustrating a guide roller and a guide pin included in a winding shuttle.

FIG. 9 illustrates a winding shuttle, a loading shuttle, a shuttle guide, and a guy block.

FIGS. 10 to 12 illustrate a mounting state of a winding shuttle and a loading shuttle.

FIG. 13 illustrates an operation in which a wire is wound on a toroidal core.

Embodiments described below are illustrated and described to help the understanding of the present disclosure, and it should be understood that the present disclosure can be variously modified and implemented differently from the embodiments described herein. It will be noted that a detailed description of known arts will be omitted if it is determined that the detailed description of the known arts can obscure the embodiments of the disclosure. The accompanying drawings are used to help easily understand various technical features of the present disclosure and it should be understood that embodiments presented herein are not limited by the accompanying drawings.

The terms including an ordinal number such as first, second, etc. may be used to describe various components, but the components are not limited by such terms. The terms are used only for the purpose of distinguishing one component from other components.

The terms used in the present disclosure are used to only describe a specific embodiment and does not intend to limit the scope of the present disclosure. A singular expression can include a plural expression as long as it does not have an apparently different meaning in context. In the present disclosure, terms such as "include", "comprise" or "have" should be understood to be intended to designate that illustrated features, numbers, steps, operations, components, parts or combinations thereof are present and not to preclude the existence of one or more different features, numbers, steps, operations, components, parts or combinations thereof, or the possibility of the addition thereof.

FIG. 1 is a perspective view illustrating a toroidal coil winding machine 1 according to an embodiment of the present disclosure, and FIG. 2 is a side view illustrating a support frame 30 and an annular shuttle 20 of the toroidal coil winding machine 1 illustrated in FIG. 1. Referring to FIGS. 1 and 2, the toroidal coil winding machine 1 according to an embodiment of the present disclosure includes a core rotating portion 10 that rotates by a predetermined angle while supporting a toroidal core C, the annular shuttle 30 that rotates through a hollow of the toroidal core C to wind a wire W (see FIG. 13) on the toroidal core C, and the support frame 30 rotatably supporting the annular shuttle 20.

The core rotating portion 10 includes a plurality of core rollers CR that support an outer circumferential surface of the core C so that the core C can rotate, and core

roller support arms

11, 12, and 13 that support the core rollers CR so that each core roller CR can rotate. For example, the plurality of core rollers CR include three rollers so as to support three points of a circumference of the core C. Among the three rollers, the two rollers CR are supported by a first support bar 11 and a second support bar 12, and the remaining one roller is supported by a third support bar 13.

Each of the first support bar 11 and the second support bar 12 revolves the roller CR to support two points of the core C, and the third support bar 13 advances and retracts the roller CR to support one point of the core C. The core rotating portion 10 corresponds to the known technology, and a detailed description thereof will be omitted.

The annular shuttle 20 is rotatably supported by the support frame 30 and withdraws the pre-wound wire W on the annular shuttle 20 while rotating through the hollow of the core C to thereby wind the wire W on the core C.

The annular shuttle 20 is divided into two areas along a circumferential direction. A first area A of the two areas of the annular shuttle 20 forms a first curved portion, and a remaining second area B of the two areas of the annular shuttle 20 forms a second curved portion. The first curved portion and the second curved portion are connected to each other to form one closed curve.

The second area B may rotate with respect to the first area A so that the closed curve formed by the annular shuttle 20 can be selectively opened and closed.

When the closed curve formed by the annular shuttle 20 is opened, i.e., when the annular shuttle 20 is opened as the second area B rotates around one end of the second area B so that the other end of the second area B faces the radial outside of the annular shuttle 20, the core C is inserted into the annular shuttle 20 so that the annular shuttle 20 passes through the hollow of the core C.

Afterwards, the second area B rotates around one end of the second area B so that the other end of the second area B faces the radial inside of the annular shuttle 20, and thus the annular shuttle 20 is closed.

The annular shuttle 20 includes

annular shuttle bodies

111, 121, 221, and 231 and

shuttle ribs

222 and 232 that are provided on inner circumferential surfaces of the

shuttle bodies

111, 121, 221, and 231 and extend inwardly in the circumferential direction of the annular shuttle 20. The annular shuttle 20 further includes a rotating portion 400 that rotates the remaining second area B with respect to the first area A of the two areas. The annular shuttle 20 is described in detail later. As the

shuttle ribs

222 and 232 are additionally provided, a total cross-sectional area of the annular shuttle 20 increases.

The support frame 30 has an annular hollow 31 formed therein, and an opening 32 for communicating the annular hollow 31 with the outside is formed at one side of the support frame 30. The annular shuttle 20 is provided in the annular hollow 31, and the support frame 30 rotatably supports the annular shuttle 20. When the annular shuttle 20 is positioned in the annular hollow 31, the support frame 30 surrounds the annular shuttle 20, and the inner circumferential surface of the support frame 30 faces the outer circumferential surface of the annular shuttle 20. When the second area B of the annular shuttle 20 is positioned in the opening 32 of the support frame 30, a rotation operation for opening the annular shuttle 20 can be performed without interference of the support frame 30.

The support frame 30 includes a plurality of rollers provided along the circumference of the hollow so that the annular shuttle 20 is positioned in the hollow to rotate. The plurality of rollers support the inner circumferential surface and the outer circumferential surface of the annular shuttle 20.

The plurality of rollers include a plurality of winding outer circumferential rollers 30R1 supporting an outer circumferential surface of a winding shuttle 200 to be described later, a plurality of winding inner circumferential rollers 30R2 supporting an inner circumferential surface of the winding shuttle 200, a plurality of loading outer circumferential rollers 30R3 supporting an outer circumferential surface of a loading shuttle 100 to be described later, and a plurality of loading inner circumferential rollers 30R4 supporting an inner circumferential surface of the loading shuttle 100. The plurality of rollers are arranged along the circumference of the hollow 31.

The support frame 30 includes power gears 30G1 and 30G2 that are tooth-coupled with the outer circumferential surface of the winding shuttle 200 and rotate the winding shuttle 200, and a tension control gear 30G3 that is tooth-coupled with the inner circumferential surface of the loading shuttle 100 and controls a rotational speed of the loading shuttle 100. The support frame 30 further includes a shuttle guide 630 and a guide block 640 for preventing the annular shuttle 20 from moving in a rotational axis direction.

A detailed description of the structure for rotatably supporting the annular shuttle 20 among the configurations of the support frame 30 will be given after the description of the annular shuttle 20.

The toroidal coil winding machine 1 according to an embodiment of the present disclosure may further include a base frame 40, and the base frame 40 may support at least one of the support frame 30 and the core rotating portion 10. The base frame 40 may have a space for accommodating various tools therein.

The annular shuttle 20 is described below. The annular shuttle 20 includes the loading shuttle 100 in which the wire W is wound and accommodated, and the winding shuttle 200 in which the wire W is wound on the core C.

The loading shuttle 100 is described with reference to FIGS. 3a to 3c. FIG. 3a is a side view illustrating a loading shuttle, FIG. 3b is an enlarged view of a second area illustrated in FIG. 3a, and FIG. 3c is a cross-sectional view taken along E-E of FIG. 3a.

Referring to FIGS. 3a to 3c, the loading shuttle 100 is formed in an annular shape to form a closed curve. The loading shuttle 100 includes loading

shuttle bodies

111 and 121 and

loading tooth portions

113 and 123 provided on inner circumferential surfaces of the loading

shuttle bodies

111 and 121.

The loading

shuttle bodies

111 and 121 are formed in an annular shape to form an appearance of the loading shuttle 100. A wire receiving groove 115 is formed along the circumference of the loading

shuttle bodies

111 and 121 to accommodate the wire W. The wire receiving groove 115 is formed by concavely recessing one side of outer circumferential surfaces of the loading

shuttle bodies

111 and 121 to the radial inside. The

loading tooth portions

113 and 123 are provided on the inner circumferential surfaces of the loading

shuttle bodies

111 and 121 and are tooth-coupled to the tension control gear 30G3.

The loading shuttle 100 is provided in the hollow of the support frame 30 and loads the wire W into the wire receiving groove 115 while rotating. The loading shuttle 100 includes a first loading curved portion 110 corresponding to the first area A of the annular shuttle 20 and a second loading curved portion 120 corresponding to the second area B of the annular shuttle 20.

The first loading curved portion 110 is formed in a 'C' shape in which a part is missing. The first loading curved portion 110 includes a first loading curve body 111 that forms a 'C'-shaped appearance among the loading

shuttle bodies

111 and 121, and a first loading curve tooth portion 113 provided on an inner circumferential surface of the first loading curve body 111 in the

loading tooth portions

113 and 123.

The second loading curved portion 120 is positioned in a defective portion of the first loading curved portion 110 and is hinge-coupled to one end of the first loading curved portion 110. As the second loading curved portion 120 rotates about a hinge axis H, the loading shuttle 100 is opened and closed, and thus a closed curve is selectively formed.

The second loading curved portion 120 may form a closed curve together with the first loading curve body 111. The second loading curved portion 120 includes the second loading curve body 121 which is one of the loading

shuttle bodies

111 and 121, and the second loading curve tooth portion 123 provided on the inner circumferential surface of the second loading curve body 231 in the

loading tooth portions

113 and 123.

While the winding shuttle 200 winds the wire W on the core C through the rotation, the loading shuttle 100 rotates in the same direction as a rotation direction of the winding shuttle 200 and withdraws the loaded wire W to provide the wire W to the winding shuttle 200. While the wire W is withdrawn, a rotational speed of the loading shuttle 100 is not always the same as the rotational speed of the winding shuttle 200, and a rotation direction of the loading shuttle 100 is opposite to a rotation direction when loading the wire.

While the winding shuttle 200 winds the wire W on the core C, the loading shuttle 100 applies tension to the wire W and receives a force of the opposite direction to the rotation direction through the tension control gear 30G3 so that a strong winding is achieved. The applied tension acts as a kind of frictional force.

The force transmitted through the tension control gear 30G3 is not large and does not greatly deform the loading shuttle 100. Accordingly, the inner circumferential surface tooth portion in the loading shuttle 100 is tooth-coupled with the tension control gear 30G3, and hence the separation of the tooth coupling due to the deformation of the loading shuttle 100 does not occur. As a result, the tension control gear 30G3 does not need to be positioned outside the loading shuttle 100, and space can be utilized for various purposes.

The winding shuttle 200 is described with reference to FIGS. 4a to 8. FIGS. 4a to 8 are used to describe the winding shuttle 200.

FIG. 4a is a side view illustrating a winding shuttle. FIG. 4b is an enlarged view of a second area illustrated in FIG. 4a. FIG. 4c is a cross-sectional view taken along D-D of FIG. 4a. FIG. 5 is a perspective view illustrating a second rotating portion. FIG. 6 is a perspective view illustrating a first rotating portion. FIG. 7 is a perspective view illustrating a fastening portion. FIG. 8 is a perspective view illustrating a guide roller and a guide pin included in a winding shuttle.

Referring to FIGS. 4a to 8, the winding shuttle 200 may be formed in an annular shape to form a closed curve in the same manner as the loading shuttle 100. The winding shuttle 200 includes winding

shuttle bodies

221 and 231, winding

shuttle ribs

222 and 232 provided on inner circumferential surfaces of the winding

shuttle bodies

221 and 231, and winding

tooth portions

223 and 233 provided on outer circumferential surfaces of the winding

shuttle bodies

221 and 231.

The winding

shuttle bodies

221 and 231 form an annular shape, and thus include an inner circumferential surface 221a, an outer circumferential surface 221d, and a pair of side surfaces 221b and 221c connecting the inner circumferential surface 221a and the outer circumferential surface 221d.

The winding

shuttle ribs

222 and 232 are positioned on inner circumferential surfaces of the winding

shuttle bodies

221 and 231, and a cross-sectional area of the winding

shuttle ribs

222 and 232 is smaller than a cross-sectional area of the winding

shuttle bodies

221 and 231. The cross-sectional areas of the winding

shuttle ribs

222 and 232 and the winding

shuttle bodies

221 and 231 are surfaces cut in the radial direction. As the winding

shuttle ribs

222 and 232 are added, the total cross-sectional area of the winding shuttle 200 increases. Hence, when a force is additionally applied in a longitudinal direction of the winding shuttle 200, a magnitude of the added force per unit area is reduced.

The winding

tooth portions

223 and 233 are tooth-coupled with the power transmission gear 30G2 and receive a rotational force from the power transmission gear 30G2.

The winding shuttle 200 includes a first winding curved portion 220 corresponding to the first area A of the annular shuttle 20 and a second winding curved portion 230 corresponding to the second area B of the annular shuttle 20.

The first winding curved portion 220 is formed in a 'C' shape in which a part is missing. The first winding curved portion 220 includes a first winding curve body 221 that forms a 'C'-shaped appearance among the winding

shuttle bodies

221 and 231, a first winding curve rib 222 provided on an inner circumferential surface of the first winding curve body 221 in the winding

shuttle ribs

222 and 232, and a first winding curve tooth portion 223 provided on an outer circumferential surface of the first winding curve body 221 in the winding

tooth portions

223 and 233.

The second winding curved portion 230 is positioned in a defective portion of the first winding curved portion 220 and is rotatably coupled to the first winding curved portion 220. As the second winding curved portion 230 rotates, the winding shuttle 200 is opened and closed and thus selectively form a closed curve. The second winding curved portion 230 may form a closed curve together with the first winding curve body 221. The second winding curved portion 230 includes the second winding curve body 231 which is one of the winding

shuttle bodies

221 and 231, the second winding curve rib 232 provided on the inner circumferential surface of the second winding curve body 231 in the winding

shuttle ribs

222 and 232, and the second winding curve tooth portion 233 provided on the outer circumferential surface of the second winding curve body 231 in the winding

tooth portions

223 and 233.

The winding shuttle 200 further includes a rotating portion 400 that rotates the second winding curved portion 230 with respect to the first winding curved portion 220.

The rotating portion 400 is provided on one side not the inner circumferential surface or the outer circumferential surface of the winding

shuttle bodies

221 and 231. The rotating portion 400 may be coupled to one side of the winding

shuttle bodies

221 and 231 through a fastening member, and the fastening member includes various members such as bolts and pins.

When the winding shuttle 200 is bent to the radial outside by an external force, a deformation rate at the inner circumferential surface or the outer circumferential surface of the winding

shuttle bodies

221 and 231 is relatively greater than a deformation rate at one side of the winding

shuttle bodies

221 and 231. When the rotating portion 400 is coupled to one side of the winding

shuttle bodies

221 and 231, the risk of damage to the rotating portion 400 can be reduced.

The rotating portion 400 includes a first rotating portion 410 provided on the first winding curved portion 220 and a second rotating portion 420 that is provided on the second winding curved portion 230 and is hinge-coupled to the first rotating portion 410 so that the winding shuttle 200 is selectively opened and closed.

The first rotating portion 410 is provided on the side of one end of the first winding curved portion 220. The second rotating portion 420 is provided on the side of the second winding curved portion 230.

The hinge axis H connecting the first rotating portion 410 and the second rotating portion 420 is positioned at an approximately central portion with a small deformation rate on one side of the winding shuttle 200.

The toroidal coil winding machine 1 according to an embodiment of the present disclosure may further include a fastening portion 500 that is provided on the first winding curved portion 220 constituting the first area A and is selectively fastened to the rotating portion 400. Hereinafter, for convenience of explanation, the fastening portion 500 is described first, and the second rotating portion 420 is described later.

As illustrated in FIG. 7, the fastening portion 500 includes a fastening body 510 formed to extend in the longitudinal direction of the annular shuttle 20, a pair of protrusions 520 that are formed to protrude from one end of the fastening body 510 in the longitudinal direction of the annular shuttle 20 and are spaced apart from each other to face each other, a first groove 530 formed to extend from an outer surface of the protrusion 520 to the radial inside of the annular shuttle 20, and a second groove 540 that is recessed from one end surface of the protrusion 520 in the longitudinal direction of the annular shuttle 20, i.e., in the circumferential direction.

The fastening body 510 is provided on the side of the other end of the first winding curved portion 220 positioned opposite to one end of the first winding curved portion 220. The pair of protrusions 520 are spaced apart from each other to form an insertion space 521 into which the rotating portion 400 can be inserted.

This fastening portion 500 is selectively fastened to the rotating portion 400. For example, the fastening portion 500 may be fastened to the second rotating portion 420.

As illustrated in FIG. 5, the second rotating portion 420 includes a second rotating body 421 extending in the longitudinal direction of the annular shuttle 20, an insertion portion 422 that is provided at an end of the second rotating body 421 and is inserted into an insertion space between the pair of protrusions 520, a stopper 423 inserted into the first groove 530, and a catching portion 424 that is slidably coupled and caught to the insertion portion 422 and is selectively inserted into the second groove 540.

The insertion portion 422 is formed to extend in a longitudinal direction of the second rotating portion 420, and one end surface and one side surface of the insertion portion 422 form a curved surface 422a so that the insertion portion 422 is smoothly inserted into the insertion space 521. The insertion portion 422 has a first long groove 422b capable of accommodating the catching portion 424 therein.

The first long groove 422b extends in a longitudinal direction of the insertion portion 422 so that the catching portion 424 can reciprocate along the longitudinal direction of the insertion portion 422.

The insertion portion 422 has a second long groove 422c extending in a longitudinal direction of the catching portion 424 at one side so that a catching handle 424b of the catching portion 424 can pass through the second long groove 422c and can be accommodated in the second long groove 422c.

The stopper 423 is provided at end of the second rotating portion 420 and is formed to extend in a direction crossing the longitudinal direction of the second rotating portion 420. The stopper 423 is inserted into the first groove 530 to stop the rotation of the second rotating portion 420.

The catching portion 424 includes a catching body 424a and the catching handle 424b provided on the catching body 424a.

The catching body 424a is accommodated in the first long groove 422b and reciprocates in the longitudinal direction of the second rotating portion 420.

The catching handle 424b is accommodated in the second long groove 422c and reciprocates in the longitudinal direction of the second rotating portion 420 together with the catching body 424a. In this case, the catching handle 424b passes through the second long groove 422c and protrudes to the outside so that a user can move it using his or her hand.

This catching portion 424 is elastically supported by an elastic member SP accommodated in the first long groove 422b.

As illustrated in FIG. 8, the winding shuttle 200 is provided with a guide roller 610 and a guide pin 620.

The guide roller 610 is provided on the first winding curved portion 220 and performs a function of pulling the wire W and winding the wire W on the core C. A frictional force may be generated between the wire W and an outer circumferential surface of the guide roller 610 so that the wire W is securely wound on the core C.

The guide pin 620 protrudes to the radial outside of the winding shuttle 200, and the wire W withdrawn from the loading shuttle 100 is aligned in the circumferential direction of the winding shuttle 200 and is prevented from being deviated from the guide roller 610.

A structure for preventing the annular shuttle 20 from moving in the rotational axis direction is described below with reference to FIGS. 9 to 12. FIG. 9 illustrates the winding shuttle 200, the loading shuttle 100, the shuttle guide 630, and the guide block 640. FIGS. 10 to 12 illustrate a mounting state of the winding shuttle 200 and the loading shuttle 100.

Referring to FIGS. 9 to 12, the shuttle guide 630 and the guide block 640 are additionally provided in the annular hollow 31 of the support frame 30.

The shuttle guide 630 is provided on one side of the winding shuttle 200, and the guide block 640 is provided on the other side of the winding shuttle 200. Hence, the winding shuttle 200 is prevented from moving in the rotational axis direction.

The shuttle guide 630 is formed in a 'C' shape in which a part is missing, and the other side of the shuttle guide 630 is coupled to the circumferential portion of the hollow of the support frame 30. A first annular groove 630a and a second annular groove 630b having a smaller diameter than the first annular groove 630a are formed on one side of the shuttle guide 630.

The first annular groove 630a extends along a circumferential direction of the shuttle guide 630 and is formed to accommodate the winding shuttle 200. The second annular groove 630b extends along the circumferential direction of the shuttle guide 630 and is formed to accommodate the guide block 640, in the same manner as the first annular groove 630a.

The shuttle guide 630 includes a winding outer circumferential roller groove 630c accommodating the winding outer circumferential roller 30R1 and a winding inner circumferential roller groove 630d accommodating the winding inner circumferential roller 30R2.

The guide block 640 is formed in a 'C' shape in which a part is missing, in the same manner as the shuttle guide 630. The guide block 640 includes a central portion 641 having a predetermined radius and thickness, and an outer portion 642 that is provided on the outer circumferential surface of the central portion 641 and has a thickness smaller than the thickness of the central portion 641 and a radius larger than the radius of the central portion 641.

The central portion 641 is accommodated in the second annular groove 630b of the shuttle guide 630.

The outer portion 642 is formed to extend so that a part spans the first annular groove 630a, and interferes with the winding

shuttle ribs

222 and 232 of the winding shuttle 200 accommodated in the first annular groove 630a. Hence, the outer portion 642 prevents the winding shuttle 200 from being deviated from the first annular groove 630a.

The guide block 640 includes a plurality of winding inner circumferential roller grooves 640a accommodating the winding inner circumferential roller 30R2.

As illustrated in FIGS. 11 and 12, the inner circumferential surface and the outer circumferential surface of the winding shuttle 200 are supported by the plurality of winding outer peripheral rollers 30R1 and the winding inner circumferential roller 30R2. Hence, even if an external force is applied to the winding shuttle 200, the winding shuttle 200 can maintain a constant annular shape by minimizing deformation.

As illustrated in FIG. 10, the inner circumferential surface of the loading shuttle 100 is supported by the loading inner circumferential roller 30R4. A tooth receiving groove 30R4a is formed to be recessed on an outer circumferential surface of the loading inner circumferential roller 30R4, and the

loading tooth portions

113 and 123 formed on the inner circumferential surface of the loading shuttle 100 are accommodated in the tooth receiving groove 30R4a. Hence, the loading shuttle 100 is prevented from moving in the rotational axis direction. The loading shuttle 100 can maintain a constant annular shape as its outer circumferential surface is supported by the loading outer circumferential roller 30R3.

A winding process of the toroidal coil winding machine 1 according to an embodiment of the present disclosure is described in detail below with reference to FIG. 13. The loading shuttle 100 is omitted in FIG. 13.

First, the loading shuttle 100 is loaded by winding the wire W while rotating in a clockwise direction CW.

When the loading shuttle 100 finishes loading, the wire W is positioned while being wound on the outer circumferential surface of the loading shuttle 100 in a predetermined direction as shown in FIG. 13.

The loaded wire W is guided by the guide pin 620 and the guide roller 610 of the winding shuttle 200 and is in a position where a part of the wire W is deviated from the loading shuttle 100.

Thereafter, the winding shuttle 200 receives a force from the first and second power gears 30G1 and 30G2 in a counterclockwise direction CCW and rotates in the counterclockwise direction CCW.

The guide roller 610 of the winding shuttle 200 periodically passes through the hollow of the core C along a rotation trajectory drawn by the winding shuttle 200, and the wire W is wound on the core C. A frictional force occurs between the guide roller 610 and the wire W, and a tension occurs in the wire W.

The guide pin 620 provides the wire W deviated from the loading shuttle 100 to the guide roller 610 in parallel with the circumferential direction of the winding shuttle 200. The guide pin 620 protruding to the outside in the circumferential direction of the loading shuttle 100 can allow the wire W not to move in the direction of the rotation axis of the loading shuttle 100 even if a force is applied to the wire W in the direction of the rotation axis of the loading shuttle 100.

The loading shuttle 100 provides the wire W to the winding shuttle 200 while rotating in the same rotational direction CCW as the winding shuttle 200.

The loading shuttle 100 and the winding shuttle 200 have the same rotation direction, but may have different rotation speeds.

The loading shuttle 100 receives a force in a direction opposite to the rotational direction during the winding from the tension control gear 30G3 so that the wire W is securely wound on the core C. Hence, a magnitude of the tension generated in the wire W increases.

When the loading shuttle 100 receives the force from the tension control gear 30G3, the portion between the guide roller 610 and the power transmission gear 30G2 in the winding shuttle 200 receives a high compressive force in the circumferential direction. This compressive force deforms the winding shuttle 200, for example, bending of the winding shuttle 200 to the outside in the circumferential direction.

Accordingly, under the existing structure in which a part of the shuttle is hinge-coupled to the remaining part and opens and closes the shuttle, the shuttle was easily damaged for a reason such as concentration of this force on the part where the hinge is connected.

However, as the winding shuttle 200 according to an embodiment of the present disclosure further includes the winding

shuttle ribs

222 and 232, the cross-sectional area and the radial thickness of the annular shuttle increase. Hence, a magnitude of the compressive force per unit area of the winding shuttle 200 is relatively reduced, and the winding shuttle 200 is not easily bent to the outside in the radial direction. As a result, a damage of the winding shuttle 200 is minimized.

Further, as the winding shuttle 200 further includes the fastening portion 500 and the rotating portion 400 in parallel with the longitudinal direction of the winding shuttle 200, the compressive force is distributed to the ends of the winding

shuttle bodies

221 and 231 and the winding

shuttle ribs

222 and 232 and to the end of one of the fastening portion 500 and the rotating portion 400. Hence, a magnitude of the compressive force per unit area of the winding shuttle 200 is relatively reduced, and a damage of the winding shuttle 200 is minimized.

Due to various causes, such as the self-elasticity of the pin and a hinge connecting the fastening portion 500 and the rotating portion 400 to the winding shuttle 200 and the tolerance between the parts, a magnitude of a force transmitted along the longitudinal direction of the winding shuttle 200 is relatively greater than a magnitude of a force transmitted along the longitudinal direction of the fastening portion 500 and the rotating portion 400. Accordingly, since a magnitude of a force concentrated on the pins and hinge of the fastening portion 500 and the rotating portion 400 is small, a damage to the fastening portion 500 or the rotating portion 400 is minimized.

Although the embodiments have been described with reference to a number of illustrative embodiments thereof, numerous other modifications and embodiments may be devised by those skilled in the art that will fall within the scope of the principles of the present disclosure. In particular, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.

[Description of reference numerals]

1: toroidal coil winding machine according to an embodiment of the present disclosure

10: core rotating portion

20: annular shuttle

30: support frame

40: base frame

100: loading shuttle

200: winding shuttle

400: rotating portion

500: fastening portion

610: guide roller

620: guide pin

630: shuttle guide

640: guide block

Claims

A toroidal coil winding machine comprising:

a core rotating portion configured to rotate by a predetermined angle while supporting a toroidal core;

an annular shuttle configured to rotate through a hollow of the toroidal core and wind a wire on the toroidal core, the annular shuttle being divided into two areas to selectively form a closed curve shape;

a support frame configured to rotatably support the annular shuttle; and

a rotating portion provided on one side of the two areas of the annular shuttle and configured to rotate a remaining second area with respect to a first area of the two areas.
The toroidal coil winding machine of claim 1, wherein the rotating portion includes:

a first rotating portion provided at one end of the first area; and

a second rotating portion provided in the second area and hinge-coupled to the first rotating portion.
The toroidal coil winding machine of claim 2, further comprising:

a fastening portion provided at other end of the first area and selectively fastened to the second rotating portion.
The toroidal coil winding machine of claim 3, wherein the fastening portion includes:

a fastening body;

a pair of protrusions formed to protrude from one end of the fastening body and spaced apart from each other to face each other;

a first groove formed to extend from an outer surface of the protrusion to a radial inside of the annular shuttle; and

a second groove formed to extend from one end surface of the protrusion in a longitudinal direction of the annular shuttle,

wherein the second rotating portion includes:

an insertion portion inserted between the pair of protrusions;

a stopper inserted into the first groove; and

a catching portion slidably coupled to the insertion portion and selectively inserted into the second groove.
The toroidal coil winding machine of claim 1, wherein the annular shuttle includes:

an annular shuttle body; and

a shuttle rib provided on an inner circumferential surface of the shuttle body and formed to extend in a circumferential direction of the annular shuttle,

wherein the rotating portion is provided on the shuttle body.
The toroidal coil winding machine of claim 1, wherein the annular shuttle further includes:

a loading shuttle in which the wire is wound and accommodated; and

a winding shuttle configured to pull and withdraw the wire from the loading shuttle at a predetermined tension and then wind the wire on the toroidal core.
The toroidal coil winding machine of claim 6, wherein an outer circumferential surface of the winding shuttle is tooth-coupled to a power transmission gear transmitting a rotational force, and

wherein an inner circumferential surface of the loading shuttle is tooth-coupled to a tension control gear controlling a magnitude of the tension.
The toroidal coil winding machine of claim 6, wherein the winding shuttle includes a first winding curved portion belonging to the first area; and a second winding curved portion belonging to the second area, and

wherein the rotating portion includes a first rotating portion provided on the first winding curved portion; and a second rotating portion that is provided on the second winding curved portion and is hinge-coupled to the first rotating portion so that the winding shuttle is selectively opened and closed.
The toroidal coil winding machine of claim 8, wherein the loading shuttle includes a first loading curved portion belonging to the first area; and a second loading curved portion belonging to the second area, and

wherein the second loading curved portion is hinge-coupled to the first loading curved portion.