JP2011210772A - Cover member of induction equipment, and shielding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover member and a shielding structure that simplify constitution and processes for a structure for fixing induction equipment such as a reactor.SOLUTION: The cover member 10 has a core shielding portion 11 and a coil shielding portion 12. The core shielding portion 11 accommodates a core portion 21 of the reactor 20, and the coil shielding portion 12 accommodates a coil portion 22 of the reactor 20. Consequently, the cover member 10 shields the reactor 20 from the outside, and positions it with respect to the cover member 10.

Description

  The present invention relates to a cover member and a shielding structure for an induction device.

  Various structures are known as structures for fixing an induction device such as a reactor at a desired position. For example, there is a configuration in which the core of the reactor core is fixed to a case or the like by a leaf spring or a bolt. However, such a configuration is not suitable depending on the material of the core. For example, when a dust core is used, the dust core is relatively fragile. Therefore, when a strong force is applied to the fixed portion, the portion may be damaged. Some dust cores contain iron, but if rust is generated on the surface of the core, it may be scattered around.

  In order to avoid such a problem, the structure which fixes the whole reactor with resin etc. is known. An example of such a configuration is disclosed in Patent Document 1. FIG. 1 and the like of Patent Document 1 describe a configuration in which a resin case is integrally formed on the outer periphery of the entire reactor, and the whole is fixed by inserting the resin case into a casing.

Japanese Patent Laid-Open No. 5-240721

However, the conventional technique has a problem that the configuration and the process are complicated.
For example, in a configuration where the core of the reactor is fixed to the case with leaf springs or bolts, a separate configuration to prevent damage to the core is required, and a shielding member to prevent rust scattering is also required become.
Moreover, in the structure by integral molding like patent document 1, first, the resin case is integrally molded on the outer periphery of the reactor, and further this is inserted into the casing, and then the C-ring is arranged to fix the reactor. I need it. In particular, the reactor cannot be positioned only with the resin case, and a C-ring is required as an additional member. Moreover, since the member which supports a reactor during shaping | molding is required in normal integral molding, since the hole is made in the position of the supporting member, the shielding member for preventing scattering of rust is needed separately ( In Patent Document 1, the casing 21 of FIG. 1 corresponds to this).

  The present invention has been made to solve such problems, and it is an object of the present invention to provide a cover member and a shielding structure capable of simplifying the configuration and the process in the structure for fixing the induction device. And

  The cover member of the induction device according to the present invention is a cover member that shields the induction device including the coil and the core from the outside, and the cover member positions the induction device with respect to the cover member.

  The cover member provides a function of shielding the guidance device from the outside and a function of positioning the guidance device by a single member. Here, “shielding” refers to shielding to the extent that substances (such as rust powder) generated in the induction device or its surroundings do not scatter to the outside, and are not necessarily kept in an airtight state or a state close thereto. Also good. Moreover, it is not always necessary to shield the entire guidance device, and a part of the guidance device may be shielded.

At least a part of the cover member may be formed in a shape along the outer shape of the guidance device. According to this configuration, the cover member supports the guidance device along the outer shape of the guidance device.
You may form in the shape which can be fixed by press-fitting an induction | guidance | derivation apparatus.
The core of the induction device may be a dust core. This configuration is a configuration in which the need for the above-described cover member is higher.
The induction device may be a transformer or a reactor.

  The guiding device shielding structure according to the present invention is a guiding device shielding structure using the above-described cover member and a case member, and the cover member is joined to the case member, thereby the cover member and the case member. Shields the entire surface of the guidance device from the outside.

  According to the cover member and the shielding structure of the guidance device according to the present invention, since the cover member shields the guidance device from the outside and positions the guidance device, the configuration and process can be simplified.

It is a figure which shows the shape of the cover member which concerns on this invention. It is a perspective view of the cover member of FIG. It is sectional drawing of the reactor shielded by the cover member of FIG. It is sectional drawing of the state which the cover member of FIG. 1 shielded the reactor of FIG. It is a partial cross section figure of the shielding structure which shields the reactor of FIG. 3 using the cover member of FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a view showing the shape of a cover member 10 according to the present invention. FIG. 2 is a perspective view of the cover member 10 as seen from different directions. The cover member 10 is used to shield the guidance device from the outside. Here, “shielding” refers to shielding to the extent that substances (such as rust powder) generated in the induction device or its surroundings are not scattered to the outside, and may not necessarily be kept in an airtight state or a state close thereto.

  FIG. 3 is a cross-sectional view showing the configuration of the reactor 20 as a guide device shielded by the cover member 10. Reactor 20 has a well-known configuration. For example, a coil 20b made of a conductor winding is formed around a core 20a containing a magnetic material. The core 20a is, for example, a dust core. A resin mold 20c is formed around the core 20a and the coil 20b for fixing and protecting the core 20a and the coil 20b.

The core 20a and the portion of the resin mold 20c formed around the core 20a form the core portion 21 of the reactor 20. Moreover, the coil 20b and the part formed in the circumference | surroundings of the coil 20b among the resin molds 20c form the coil part 22 of the reactor 20. That is, the reactor 20 of FIG. 3 includes a core portion 21 including a core 20a and a coil portion 22 including a coil 20b. In addition, although the reactor 20 contains the two core parts 21, these shall be symmetrical in this embodiment.
Although not shown, the outer surface of the core portion 21 has a planar surface and a curved side wall surface (FIG. 3 is a sectional view in a direction parallel to the planar surface of the core portion 21. Yes, the shape of the side wall surface of the core portion 21 appears).

  In the present embodiment, the resin mold 20c does not cover the entire reactor 20, and the resin mold 20c is not formed at the position of the support member used in the formation. This will be described with reference to FIG. The resin mold may cover the entire reactor.

As shown in FIGS. 1 and 2, the cover member 10 has a shape corresponding to the shape of the reactor 20 in order to cover and shield the reactor 20.
The cover member 10 includes a core shielding part 11 that houses the core part 21 and shields it from the outside, and a coil shielding part 12 that houses the coil part 22 and shields it from the outside. The cover member 10 includes two core shielding parts 11, which are symmetrical in the present embodiment. The core shielding part 11 includes a planar core shielding part bottom surface 11a formed in a substantially semicircular shape, and a core shielding part side wall 11b rising vertically from the core shielding part bottom surface 11a at the periphery of the core shielding part bottom surface 11a.

  The shape of the core shielding part bottom surface 11 a and the core shielding part side wall 11 b (strictly, the shape of the inner surfaces thereof) is formed in a shape along the outer shape of the core part 21 of the reactor 20. Moreover, the depth of the core shielding part 11 (that is, the height of the core shielding part side wall 11b) matches the size of the core part 21 in the corresponding direction. With such a configuration, the core shielding part 11 exactly covers the core part 21 in the part where the core shielding part bottom surface 11a and the coil shielding part side wall 12b exist.

Moreover, the coil shielding part 12 includes a planar coil shielding part bottom surface 12a formed in a rectangular shape, and a coil shielding part side wall 12b that rises perpendicularly from the coil shielding part bottom surface 12a at the periphery of the coil shielding part bottom surface 12a.
Here, unlike the core shielding part 11, the coil shielding part 12 is not formed along the outer shape of the coil part 22 to be accommodated. That is, the coil shielding part 12 does not cover the coil part 22 exactly. For example, although the coil part 22 has a cylindrical surface, the coil shielding part bottom surface 12a with respect to this cylindrical surface is not a cylindrical surface but a planar shape. However, the coil shielding part 12 is formed in a shape that can accommodate the coil part 22 in alignment with the outer shape of the coil part 22. For example, the shape of the inner circumference of the coil shielding portion side wall 12b viewed from the direction shown in FIG. 1 matches the shape of the outer circumference of the coil portion 22 shown in FIG.

  Furthermore, the cover member 10 has a flange 13 as a structure for fixing the cover member 10 to another member. The flange 13 is provided on the outer side of the joint portion between the core shielding part 11 and the coil shielding part 12, for example. The flange 13 has a bolt hole 13a, and is fixed to another member by a screwing member such as a bolt screwed into the bolt hole 13a.

  In addition, the open end side end surface 10a of the cover member 10 is formed flush. That is, the end face on the front side of FIG. 1 of the core shield side wall 11b, the end face on the front side of FIG. 1 of the coil shield side wall 12b, and the end face on the front side of FIG. With such a configuration, when the cover member 10 is arranged so that the open end side end surface 10a of the cover member 10 faces the surface on which the cover member 10 is installed, the inside of the cover member 10 can be shielded from the outside.

  With such a configuration, the cover member 10 can accommodate the reactor 20 and shield it from the outside. For example, the reactor 20 is press-fitted into the cover member 10 (in the direction from the front side to the back side in FIG. 1), and the core portion 21 and the coil portion 22 are respectively brought into contact with the core shielding portion bottom surface 11a and the coil shielding portion bottom surface 12a. Make contact.

  4 is a cross-sectional view showing a state in which the cover member 10 houses the reactor 20, and is a cross-sectional view taken along the line IV-IV in FIG. ). The reactor 20 is press-fitted into the cover member 10, and the cover member 10 positions and fixes the reactor 20 with respect to the cover member 10. When the two core shielding parts 11 accommodate the core part 21 in the press-fitted state in this way, the two core shielding part side walls 11 b hold the reactor 20 in the core part 21. Further, when the coil shielding part 12 accommodates the coil part 22, the coil shielding part side wall 12 b holds the reactor 20 in the coil part 22. Thus, the cover member 10 is formed in a shape that allows the reactor 20 to be press-fitted and fixed.

  FIG. 5 is a partial cross-sectional view of the shielding structure of the reactor 20 using the cover member 10 (only the coil 20b is shown regardless of the cross section). Cross sections of the cover member 10 and the reactor 20 are taken along the line V-V in FIG. 4 (a cross-sectional view in a direction perpendicular to the planar surface of the core portion 21). This shielding structure is constituted by the cover member 10 and the case member 30.

  First, the reactor 20 is press-fitted into the cover member 10 and fixed as shown in FIG. Next, the cover member 10 is joined to the case member 30 so that the open end side end face 10 a of the cover member 10 is in contact with the case member 30. That is, the cover member 10 is disposed so that the open end side end surface 10 a is in contact with the case flat surface portion 30 c of the case member 30. As a result, a part of the coil portion 22 is accommodated in the case recess 30 b of the case member 30. Thereafter, the bolt 40 is screwed into the bolt hole 13 a provided in the flange 13 of the cover member 10 and the bolt hole 30 a provided in the case member 30, whereby the cover member 10 is fixed to the case member 30. Since the cover member 10 has four bolt holes 13a, it is fixed at four places (only two places are indicated by broken lines in FIG. 5).

  Thus, the cover member 10 and the case member 30 shield the entire surface of the reactor 20 from the outside. Since the reactor 20 is fixed to the cover member 10, the reactor 20 is also fixed to the case member 30 as a result.

  Since the open end side end face 10a of the cover member 10 is formed flush, the inner space of the cover member 10 can be shielded from the outside by coming into contact with the case flat surface portion 30c of the case member 30, thereby the reactor 20 Is shielded from the outside.

  The core part 21 has a mold hole 21a. This is a hole generated as a result corresponding to the space occupied by the support member used in forming the resin mold 20c. Since the resin mold 20c is not formed in the mold hole 21a, the core 20a is not covered and is directly exposed to the outside. However, the core shielding part 11 of the cover member 10 and the case flat part 30c of the case member 30 are connected to the mold hole. The entire core portion 21 including 21a is covered and shielded. For this reason, even if rust is generated on the surface of the core 20a in the mold hole 21a, the rust is prevented from being scattered around.

  As described above, according to the cover member 10 according to the first embodiment, the shielding and positioning of the reactor 20 can be realized by a single member, so that the configuration and the manufacturing process can be simplified. In addition, this can reduce manufacturing costs.

Moreover, since the core shielding part 11 of the cover member 10 is formed in the shape along the external shape of the reactor 20, the reactor 20 can be supported along the external shape, and a pressure does not concentrate on one point. Therefore, even if the material of the core 20a is relatively brittle like a dust core, it can be fixed without being damaged.
Further, even if there is a gap in the resin mold 20c like the mold hole 21a, the entire reactor 20 including the gap can be shielded.

Further, since the reactor 20 is press-fitted into the cover member 10, there is no need to bond the core 20a or other parts to the cover member 10 or the like, and the core 20a can be made adhesive-free.
Further, due to the heat insulating effect of the cover member 10 and the case member 30, it is possible to prevent the thermal tilt from the reactor 20 to the surroundings.
Moreover, since the open end side end surface 10a of the cover member 10 is formed flush, it is not necessary to process the case flat portion 30c of the case member 30 into a complicated shape.

In the first embodiment, the following modifications can be made.
In the first embodiment, the resin mold 20c is formed on the entire surface of the reactor 20 except for the mold hole 21a. As a modification, the resin mold may be formed only on a part of the surface of the reactor. For example, most of the core may be exposed. Even in such a case, if the inner surface of the cover member is shaped along the outer shape of the reactor, the reactor can be similarly fixed while being shielded.

  In Embodiment 1, the coil shielding part 12 of the cover member 10 does not follow the outer shape of the coil part 22 of the reactor 20, but this may be a shape along the outer shape of the coil part 22. In this case, the shape of the core shielding part 11 may not be along the outer shape of the core part 21. Further, the portion along the outer shape of the reactor 20 in the cover member 10 does not necessarily have a large area. For example, even if the reactor 20 is positioned by a structure such as a plurality of pillars protruding toward the inside of the cover member 10. Good.

  In the first embodiment, the open end side end surface 10 a of the cover member 10 is formed flush with the case flat surface portion 30 c of the case member 30. As a modification, the open end side end face may not be flush and may not have a shape along the surface of the case member, as long as the rust generated on the surface of the core does not scatter to the outside.

  In the first embodiment, the case member 30 is formed along the outer shape of the reactor 20 as shown in FIG. As a modification, the shape of the case member may not be along the outer shape of the reactor, and a gap may exist between the reactor and the case member. Further, the case member may have a shape that does not contact the reactor. Even in such a case, if the internal space is shielded by the cover member and the case member, the reactor can be shielded from the outside.

  In the first embodiment, the reactor 20 is shown as an example of the induction device. However, this may be another induction device such as a transformer, in which a coil including a conductor is wound around a core including a magnetic body. I just need it.

DESCRIPTION OF SYMBOLS 10 Cover member (10a open end side end surface), 11 Core shielding part (11a Core shielding part bottom face, 11b Core shielding part side wall), 12 Coil shielding part (12a Coil shielding part bottom face, 12b Coil shielding part side wall), 13 Flange ( 13a bolt hole),
20 reactor (induction device), 20a core, 20b coil, 20c resin mold, 21 core part (21a mold hole), 22 coil part,
30 case members (30a bolt holes, 30b case recesses, 30c case flat portions), 40 bolt holes.

Claims (6)

A cover member that shields an induction device including a coil and a core from the outside,
The cover member positions the guide device with respect to the cover member.   The cover member according to claim 1, wherein at least a part of the cover member is formed in a shape along an outer shape of the guide device.   The cover member according to claim 1, wherein the cover member is formed in a shape that can be fixed by press-fitting the guide device.   The cover member according to any one of claims 1 to 3, wherein the core of the induction device is a dust core.   The cover member according to claim 1, wherein the induction device is a transformer or a reactor. It is the shielding structure of the induction | guidance | derivation apparatus using the cover member as described in any one of Claims 1-5, and a case member,
The cover member is joined to the case member, whereby the cover member and the case member shield the entire surface of the guide device from the outside.

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