KR20210009926A - Bobbin for driving motor - Google Patents

Abstract

The present invention relates to a bobbin for a drive motor. In the bobbin for a drive motor in which a pair of assembled main bodies are formed by coupling, the assembled main bodies include: an assembled body unit having a lateral cross section of an angled C shape; a one coupling unit having an outer coupling groove formed on an outer surface of one side of an open end of the assembly main body unit; and the other coupling unit having an inner coupling groove formed on an inner surface of the other side of the open end of the assembly main body unit, wherein the bobbin is formed through mutual coupling of the one coupling unit and the other coupling unit provided in the pair of assembly main bodies.

Description

Bobbin for driving motor

The present invention relates to a bobbin for a driving motor, and more particularly, to a driving motor bobbin capable of simplifying an assembly process and design by unifying a structure of an assembly portion of a bobbin constituting a motor, and reducing manufacturing cost.

The conventional motor has a stator structure composed of a core 10, bobbins 20 and 30, coil 40, and support ring 50, as shown in FIG. 1A. Such a motor inserts the bobbins 20 and 30 into the core 10 and then winds the coil 40 around the bobbins 20 and 30. At this time, the bobbins 20 and 30 serve to insulate the core 10, which is a conductor, and the coil 40 so that electricity does not pass.

At this time, in the divided bobbins 20 and 30, the upper bobbin 20 and the lower bobbin 30 are assembled with the core 10, respectively, and then an array (ARRAY) in the form of a core bobbin assembly is assembled. The outer side of the assembled core assembly is assembled through hot press fitting with the inner side of the support ring 50.

However, the structure of the bobbins 20 and 30 used in the conventional motor is not the same in the shape of the upper bobbin 20 and the lower bobbin 30, so the bobbin assembly structure is complicated, and two types of bobbins having different shapes are required. Do.

In this case, because the number of parts to be assembled increases, the process line is inevitably complicated, and because the shapes of the upper bobbin 20 and the lower bobbin 30 are different, design and verification test times are required to be doubled. There is a problem that the mold cost is doubled because two molds to be stamped out are also required.

In addition, the conventional bobbins 20 and 30 have a complicated structure of the winding part, are vulnerable to rigidity, and are bulky compared to their role.

The conventional coil is fixed to the bobbins 20 and 30 in such a manner that the coil 40 is wrapped around the protruding portion 21 of the bobbin, as shown in FIG. 1B.

At this time, in the conventional bobbin, when the coil 40 is wrapped, a part of the protrusion 21 is cut to guide the coil 40. For this reason, the protrusion 21 of the bobbin is bound to be thinner.

As described above, since the conventional bobbins 20 and 30 do not hold the coil 40 but take a method in which the coil 40 is wrapped around the protrusion 21 of the bobbin, the coil 40 is bound to be incompletely fixed. Here, the reason for wrapping the coil around the bobbins 20 and 30 is to ensure that the coil 40 is wound well during winding and to prevent unwinding after winding.

However, like the conventional bobbins (20, 30), in the case of delivery in units of core bobbin assemblies, the coil 40 is not fixed to the bobbins 20, 30, but only wrapped around it, so that the coil 40 is unwound or the arrangement is There is a problem that the quality cannot be guaranteed because it is disturbed.

As described above, the protrusion 21 of the conventional bobbin has a complicated structure since it is necessary to put the dimensions and tolerances of the bobbins 20 and 30 along the passage through which the coil passes first. In other words, since the bobbins 20 and 30 are injection products, there is a concern that unfilled parts may occur if the structure is complicated.

Second, the conventional winding structure of the bobbin is weak in rigidity because the thickness of the protrusion 21 of the bobbin must be thin in order to guide the coil 40 to be wound.

Third, the protrusion 21 of the conventional bobbin fixes the coil 40 and serves to guide the coil 40 to be wound so as not to be disturbed. At this time, there is a problem in that the volume occupied is large compared to the role of holding the coil 40 so that it does not come out.

In addition, in the conventional bobbins 20 and 30, as shown in FIG. 1C, the upper portion of the stacked core 10 is raised.

When the core stacking ends are separated, insulation defects may occur as the distance from the terminals assembled at the top becomes close.

In addition, considering that the core itself serves as a path through which the magnetic flux passes, not only the electrical performance is deteriorated, but the core sheet is separated, and the area to be pressed into the support ring is reduced, so that the axial release force and the torsional release force are also concerned.

In order to secure a sufficient insulation distance and prevent deterioration of electrical and mechanical performance, it is necessary to prevent the phenomenon that the core stack is released and lifted. Here, it can play a role of preventing lifting by pressing the core against the bobbin.

On the other hand, the existing bobbin may be formed to have an integral shape by being injected around the core. However, if the bobbin is integral, it may have a simple shape, but there is a problem that the unit cost is increased because insulating paper is added to it.

The present invention was conceived to solve the conventional problem, and as in the prior art, the bobbin surrounding the core is made of two by varying its shape, because it doubles the time and cost of all the processes involved. By assembling using the same type of bobbin, it is intended to provide a driving motor bobbin capable of reducing one type of assembly body constituting the bobbin.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The bobbin for a driving motor according to one aspect of the present invention for achieving the above object is a bobbin for a driving motor in which a pair of assembled main bodies are formed by coupling, wherein the assembled main body has a'C' shape in side cross section. Assembly body; One coupling portion having an outer coupling groove formed on one outer surface of an open end of the assembly body portion; And a second coupling portion having an inner coupling groove formed on the other inner surface of the open end of the assembly body portion, and forming a bobbin through mutual coupling of one coupling portion and the other coupling portion provided in the pair of assembly bodies.

The assembly body is provided with a protrusion protruding from one side of the upper portion and a coil insertion groove into which the coil is inserted so that the coil can be fixed, and a separation prevention protrusion in the coil insertion groove to prevent the inserted coil from being separated It is preferable that is provided.

Further, the coil insertion groove of the assembly body is formed at a position as high as the thickness of the coil from the height at which the coil is wound when the coil wound on the bobbin is fixed.

In addition, the assembly body is provided with a core pressing plate extending from an upper portion of one side where the core is located so that one end of the core can be covered when the assembly body is coupled.

According to an embodiment of the present invention, by forming a bobbin by combining one type of assembly body in pairs, it is effective to consider only one type of bobbin assembly body when designing or manufacturing the shape of the assembly body.

As described above, according to the present invention, as the bobbin can be formed by combining one type of assembly body, the manufacturing process of the bobbin is reduced, and the manufacturing cost is also reduced.

1A to 1C are views for explaining a conventional motor.
2 is a perspective view of a bobbin for a driving motor according to an embodiment of the present invention.
3 is a cross-sectional view of II-II of FIG.
Figure 4 is a combined trial for explaining the bobbin for a drive motor according to an embodiment of the present invention.
5 is a use state diagram showing a state in which a coil is wound around a bobbin for a driving motor according to an embodiment of the present invention.
6 is a front view for explaining a coil fixing part in the bobbin for a driving motor according to an embodiment of the present invention.
7 is an enlarged view of VI of FIG. 6.
8 is a reference diagram for explaining a coupling state of a core and a core pressing plate in a bobbin for a driving motor according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have it, and the invention is only defined by the scope of the claims. Meanwhile, terms used in the present specification are for explaining embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, operations and/or elements in which the recited component, step, operation and/or element is Or does not exclude additions.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a perspective view of a bobbin for a driving motor according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of II-II of FIG. 2, and FIG. 4 is a combined attempt to explain the bobbin for a driving motor according to the present invention. 5 is a state diagram showing a state in which a coil is wound around a bobbin for a driving motor according to the present invention.

As shown in Figs. 2 to 5, the bobbin for a driving motor of the present invention is made of a pair of assembled main bodies 110-1 and 110-2.

The assembly body (110-1, 110-2) is provided with an assembly body portion (110) having a'C' shape in side cross section, and the core (20) through the coupling between the open assembly body portion (110) of the other assembly body. ) To be accommodated. That is, the assembled body 110-1 or 110-2 forms the bobbin 100 by combining with other assembled main bodies.

Accordingly, the core 20 is inserted into the space inside the bobbin 100, and the coil 30 is wound outside the bobbin 100. In this case, the assembly main bodies 110-1 and 110-2 may be provided with partition wall portions 120 on both sides to prevent the coil 30 to be wound from being separated from the outside.

On the other hand, the assembly body (110-1, 110-2) for coupling, the outer coupling portion 130 having an outer coupling groove 131 formed on the outer surface of one side of the open end of the assembly body portion 110 and the open The inner coupling portion 140 is provided with an inner coupling groove 141 formed on the inner surface of the other side of the end.

According to an embodiment of the present invention, by forming a bobbin to be coupled through a pair of one type of assembly body, it is possible to manufacture a bobbin with only one type of assembly body when designing or manufacturing the shape of the assembly body.

Accordingly, according to the present invention, as the bobbin can be formed using only one type of assembled body, the manufacturing process step of the bobbin is reduced, and the manufacturing cost is also reduced.

In addition, the assembly body (110-1, 110-2) according to an embodiment of the present invention, as shown in Figs. 2, 4 to 7, a coil fixing part for fixing the wound coil 30 ( 150) is further included.

The coil fixing part 150 is formed in the protrusion 151 and the protrusion 151 that are partially drawn upward from the top of the assembly body 110-1 and 110-2 to insert the coil 30 into the coil insertion groove. Includes 152.

In addition, the coil insertion groove 152 is provided with a separation preventing protrusion 153 in the coil insertion groove 152 so as to prevent the inserted coil 30 from being separated. Here, the departure prevention protrusion 153 has a tapered shape that expands from the top to the bottom, and serves as a guide when the coil 30 is inserted, and a predetermined angle at the bottom so that the inserted coil 30 is not separated from the outside ( 90 degrees).

According to an embodiment of the present invention, as in a conventional bobbin, in fixing a wound coil, the coil is not manually fixed by winding the coil on one side of the bobbin, but is inserted into the coil insertion groove, thereby reducing the diameter of the coil. There is an advantage to be able to.

This is because the bobbin inside the motor has a terminal structure at the top and bottom, and it is closely assembled with the assembly body, thereby solving the dimensional limitation in design.

In addition, according to an embodiment of the present invention, since it is possible to reduce the diameter of the coil, it is possible to reduce the amount of injection and to design more simply because there is no need for injection other than the area extending from the core part to the insertion part.

In other words, in the conventional case, since the coil is wound and fixed, the thickness of the flesh of the part for winding the coil must be thin, whereas the present invention does not have a coil wound structure, so there is no need to reduce the thickness of the flesh for fixing the coil. There is an advantage that can compensate for the weak point.

And the coil insertion groove 152 of the assembly main body (110-1, 110-2) is fixed to the coil 30 wound on the bobbin 100, the thickness of the coil 30 at the height at which the coil 30 is wound. It is preferable to be formed in a high position.

In the case of the conventional bobbin, there is a problem that the coil 30 must be positioned at least two stages or more than the height of the wound coil 30 because a method of winding the coil 30 on one side of the bobbin 100 has to be used. By using a method of inserting and fixing the coil 30 wound around 152, there is an advantage that the position of the configuration for fixing the coil 30 can be lowered.

And the assembly body (110-1, 110-2), as shown in Figs. 2, 4 to 8, so that one end of the core 20 can be covered when combined, the assembly body 110 in which the core 20 is located. -1, 110-2) is provided with a core pressing plate 160 extending from an upper portion of one side.

In this way, by providing the core pressing plate 160 having a structure capable of covering the ends of the core 20 on the assembly main bodies 110-1 and 110-2, the core sheet is on the upper side when assembling a plurality of cores 20 There is an effect that can press the force to be lifted in the opposite direction.

In the above, the configuration of the present invention has been described in detail with reference to the accompanying drawings, but this is only an example, and various modifications and changes within the scope of the technical idea of the present invention are those of ordinary skill in the art. Of course this is possible. Therefore, the scope of protection of the present invention should not be limited to the above-described embodiments, but should be determined by the description of the following claims.

20: core 30: coil
100: bobbin 110-1: 110-2: assembly body
110: assembly body 120: bulkheads on both sides
130: outer coupling portion 140: inner coupling portion
150; Coil fixing unit 160: core pressing plate

Claims (5)

In the bobbin for a driving motor in which a pair of assembled main bodies are formed by coupling,
The assembly body,
An assembly body portion having a lateral cross section in the shape of a'C'shape; One coupling portion having an outer coupling groove formed on one outer surface of an open end of the assembly body portion; And a second coupling portion having an inner coupling groove formed on the other inner surface of the open end of the assembly body portion,
A bobbin for a driving motor, characterized in that the bobbin is formed through mutual coupling of one coupling portion and the other coupling portion provided in a pair of assembly bodies.
The method of claim 1,
In the assembly body,
A bobbin for a driving motor, wherein a protrusion protruding from one side of an upper portion and a coil insertion groove into which the coil is inserted are provided so that the coil can be fixed.
The method of claim 2,
A bobbin for a driving motor, characterized in that a departure preventing protrusion is provided in the coil insertion groove.
The method of claim 2,
The coil insertion groove of the assembly body,
When the coil wound on the bobbin is fixed, the bobbin for a driving motor is formed at a position as high as the thickness of the coil from the coiled height.
The method of claim 1,
The assembly body,
The bobbin for a driving motor is provided with a core pressing plate extending from an upper portion of one side where the core is positioned so that one end of the core is covered when the assembly body is coupled.

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