JP2009043929A - Reactor fixation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixation structure of a reactor that can be positioned and fixed to the case of the reactor reliably although it can be assembled by a simple configuration and can absorb expansion and shrinkage because of a temperature change in a core. <P>SOLUTION: The reactor 1 is stored in the case 2, and a contacting section 32 in a plate 3 is inserted into the gap between the core 11 and the case 2 so that the contacting section 32 comes into contact with the side of a U-shaped core section 11a. The plate 3 and the case 2 are fixed from a vertical direction by a bolt 4 concerned so that a body section 31 is positioned at the upper surface side of the U-shaped core section 11a. A press screw 6 is inserted into two press screw holes 31b formed in the body section 31, and the core 11 is pressed at an area to the bottom face section of the case 2 by the press screw 6. A screw 5 is inserted into the contacting section 32 of the plate 3 inserted into the gap between the case 2 and the reactor 1 from a screw hole 23 formed on the side of the case 2, thus energizing the contacting section 32 to the side of the core 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reactor fixing structure, and more particularly to a reactor fixing structure capable of absorbing the thermal expansion and contraction of the reactor.

  At present, various types of static induction appliances such as a reactor having a winding (coil) and a magnetic core (core) are widely used. Among them, the reactor is connected to various electric circuits such as a booster circuit, an inverter circuit, and an active filter circuit using inductive reactance, and various types of reactors have been developed according to applications. As this general reactor, a structure in which a coil and a core are housed in a metal case together with other insulating members and filled with resin is often used.

  In the case of a reactor in which such a core and a coil are housed in a case, it is necessary to securely fix the core and the coil to the case as a premise for filling with a resin. Therefore, an embodiment using a leaf spring is known as one of the fixing structures. For example, in order to hold the core in the case, the core 11 is fixed to the case 2 using a leaf spring 20 as shown in FIG.

  Specifically, a leaf spring 20 having a lateral shape that is a surface that contacts the case 2 is fixed to the case 2 with a bolt 4. As a result, the leaf spring 20 biases the core 11 to the surface opposite to the surface of the case 2 that contacts the leaf spring 20. Reference numeral 30 in the figure denotes a receiving member that receives the leaf spring 20 provided so as to mesh with the leaf spring 20. With such a configuration, it is possible to prevent the reactor 1 from jumping out of the case 2 by fixing the reactor 1 to the case 2.

In addition, due to the difference in thermal characteristics due to the difference in material between the core and the case, the gap formed in the connecting part of the core is expanded by the heat generated by the reactor device, and the vibration of the core is transmitted to the outside of the housing. In order to cope with the problem of increased noise due to noise, the core is attached to the aluminum case with a bolt via a retainer, and a cushion rubber is inserted between the retainer and the core to regulate the separation of the core from the case. Has been proposed (see Patent Document 1).
JP 2004-241475 A

  By the way, in the conventional reactor fixing structure, when the leaf spring 20 is housed in the case 2, it is necessary to press-fit after the leaf spring 20 is contracted. However, since a member having an urging force of 30 to 40 kg is normally used for the plate spring 20 used in such a reactor 1, a jig for incorporating the plate spring 20 is required, and a simple assembly cannot be realized. There was a problem that the efficiency was lowered. Further, when the leaf spring 20 is housed, a space is required in the case 2, so that an increase in the amount of resin that is a filling material has also been a problem.

  Moreover, in the technique disclosed in Patent Document 1, since the reactor is fixed to the case only in the insertion direction of the reactor into the case, even if a cushion rubber or the like is provided, the insertion direction is limited to the insertion direction. The positioning and fixing of the reactor to the case in the vertical direction, i.e. in the horizontal direction relative to the reactor, was insufficient.

  The present invention has been proposed in order to solve the above-described problems. The purpose of the present invention is to ensure positioning and fixing of the reactor to the case, although it can be assembled with a simple configuration. An object of the present invention is to provide a reactor fixing structure that can be performed and can absorb expansion and contraction due to temperature changes of a core. It is another object of the present invention to provide a reactor fixing structure capable of reducing the filling material by reducing an extra space.

  In order to achieve the above object, the invention of claim 1 is a reactor fixing structure for fixing a reactor to a reactor case as a support, and includes a plate for fixing the reactor to the reactor case. A main body portion fixed to the reactor case so as to be positioned on the upper surface side of the reactor, and an abutting portion that is arranged perpendicularly to the main body portion and is inserted into a gap between the reactor case and the reactor and abuts on a side surface of the reactor And the main body has a fixing means for urging and fixing the reactor from the upper surface side of the reactor to the bottom surface side of the reactor case, and the contact portion is inserted from the outside of the reactor case. The urging member is urged from the inner surface side of the reactor case toward the reactor side.

  In the above aspect, the reactor can be fixed to the case from above and below by the fixing means, and the urging member is inserted into the reactor via the abutment portion by the urging member inserted from the outside of the case. The inner surface opposite to the inner surface of the case can be biased. For this reason, the reactor can be fixed to the case from the two axial directions of the vertical direction and the horizontal direction.

That is, since the core is fixed to the case from the vertical direction that is the insertion direction of the reactor into the case by the fixing means of the plate body fixed to the case, it is possible to prevent the reactor from jumping out and to bias By inserting the member into the abutting portion from the horizontal direction perpendicular to the insertion direction of the reactor, it is possible to suppress the shake of the reactor and fix it reliably.

  Therefore, since the core is mainly fixed to the case using the plate, the fixing means, and the urging member, the space required for the leaf spring adopted as the prior art can be reduced, and the amount of filler used can be reduced. Can be reduced. In addition, since a leaf spring is not employed, it is not necessary to use a built-in jig required for inserting the leaf spring into the gap between the case and the reactor. Accordingly, it is possible to realize a reactor fixing structure that can be easily assembled and reduced in cost with a simple configuration that reduces the number of assembly steps.

  Further, as described above, since the reactor is securely fixed to the case by the plate, the fixing means, and the biasing member, the case fixed to the plate is similarly expanded against the thermal expansion and contraction of the reactor. It is possible to cope with this by improving the heat dissipation efficiency.

  According to a second aspect of the present invention, in the first aspect of the invention, the plate is made of a vibration damping alloy.

  In the above aspect, since the damping alloy is adopted for the plate, vibration from the reactor can be absorbed through the main body portion and the contact portion, and the reactor can be stably fixed to the case. Can be realized.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the plate is fastened and fixed to the reactor case by a bolt.

  In the above aspect, since the plate can be fixed to the reactor case only by tightening, the assembly operation and the adjustment of the urging force are facilitated.

  The invention of claim 4 is the invention of any one of claims 1 to 3, wherein the reactor case is made of a ductile material.

  The invention according to claim 5 is the reactor fixing structure according to claim 4, wherein the reactor case is made of an aluminum alloy or a magnesium alloy.

  In the above aspect, since the case which fixes a reactor is comprised from ductile materials, such as an aluminum alloy and magnesium alloy containing aluminum, it can respond to the thermal expansion and contraction of a reactor which generate | occur | produce by heat_generation | fever etc. Specifically, since the reactor is urged in the horizontal direction with respect to the case by the urging member inserted from the outside of the plate and the reactor case, the case made of an aluminum alloy or the like is fixed in an extended state. .

  Therefore, when the reactor is thermally expanded due to a high temperature under this condition, the difference between the expansion rate of the reactor case and the reactor is absorbed through the plate and the biasing member, and the case extends while following the expansion of the reactor. This corresponds to the thermal expansion. Further, when the reactor contracts due to low temperature, the difference between the contraction rate of the reactor case and the reactor is absorbed through the plate and the urging member, and the case contracts while following the contraction of the reactor. Thereby, it is possible to provide a reactor fixing structure capable of absorbing thermal expansion and contraction due to a temperature change of the reactor.

  The invention of claim 6 is the reactor fixing structure according to claim 1, wherein the fixing means is inserted into the main body portion from an insertion direction of the reactor into the reactor case, and the reactor is placed on the bottom side of the reactor case. It is a pressing screw for pressing.

  In the above aspect, since the pressing screw is used as the fixing means, the reactor can be pressed by inserting the pressing screw into the plate from above and below, and the reactor can be urged toward the case bottom side. Accordingly, it is possible to reliably fix the reactor to the case not only from the horizontal direction but also from the vertical direction by the urging member inserted from the outside of the case to the contact portion. Furthermore, since the pressing screw is used, it is possible to cope with the case where the size of the reactor to be pressed changes, which contributes to cost reduction without using extra parts.

  The invention according to claim 7 is the reactor fixing structure according to claim 1, wherein the urging member is a screw.

  In the above-described aspect, since the contact portion of the plate is urged toward the reactor side by the screw inserted from the side of the case, the contact portion of the plate is positioned in the horizontal direction. The position with respect to the case is also fixed. Therefore, the reactor can be brought into close contact with the case also in the horizontal direction, which contributes to the improvement of heat dissipation efficiency.

  According to the present invention as described above, the reactor can be reliably positioned and fixed to the case even though it can be assembled with a simple configuration, and expansion and contraction due to temperature change of the core can be achieved. An absorption reactor fixing structure is provided.

  Next, the best mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described with reference to the drawings. In addition, description of the matter which is common in the content already demonstrated by the background art and the subject is abbreviate | omitted.

[1. This embodiment]
[1.1. Schematic configuration]
An outline of the reactor fixing structure of the present embodiment will be described first with reference to FIG. FIG. 1 is an exploded perspective view of a reactor in the present embodiment. As shown in FIG. 1, a reactor 1 having a core 11 and a coil 12 and a case 2 for housing the reactor 1 are shown, and a single plate 3 is provided in the gap between the reactor 1 and the case 2 in order to fix them. Is interpolated.

  Although the specific shape of the plate 3 will be described later, the plate 3 is fixed to the case 2 with bolts 4 from the vertical direction, which is the insertion direction of the reactor 1 into the case 2. Further, by inserting the screw 5 from the screw hole 23 provided on the side of the case 2 toward the portion inserted in the gap between the reactor 1 and the case 2 of the plate 3, the core 11 and the case are seen from the horizontal direction. 2 are integrated and fixed.

  Furthermore, in order to securely fix the core 11 and the case 2 from the vertical direction, two pressing screws 6 for pressing the core 11 from above are inserted in the plate 3. The pressing screw 6 inserted in the direction of the core 11 from the plate 3 fixed to the case 2 with the bolt 4 and the screw 5 inserted into the plate 3 from the case 2 described above can be used without using a leaf spring. It becomes possible to fix the core 11 and the case 2 from the axial direction.

  When the core 11 is fixed to the case 2 by a screw 5 inserted from the side of the case 2 and a pressing screw 6 inserted through the plate 3, the inside of the case 2 is a resin such as urethane (see FIG. (Not shown).

[1.2. Specific configuration]
Next, regarding the fixing structure of the reactor 1, a specific configuration will be described below with reference to FIGS. FIG. 2 is a plan view (a) of the reactor in the present embodiment, an AA sectional view (b) in the plan view (a), and a BB sectional view (c) in the plan view (a).

[1.2.1. Reactor configuration]
First, the reactor 1 housed in the case 2 employed in the present embodiment is generally used as described in the background art. As shown in FIG. 1, the core 11 and the coil are used. 12 is comprised.

  The core 11 includes a U-shaped core portion 11a made of a U-shaped magnetic body exposed at both ends of the coil 12, and a middle core portion 11b (not shown) configured by a plurality of magnetic blocks inserted into the coil 12. ). Further, between the middle core portion 11b and the coil 12, a rectangular tube-shaped bobbin 13 is disposed so as to cover the middle core portion 11b. The bobbin 13 insulates the middle core portion 11b and the coil 12 from each other.

  This coil 12 in this example has a configuration in which a rectangular wire is wound in a rectangular tube shape in the width direction with respect to a bobbin 13 that covers the middle core portion 11b, and a pair is formed so that the axes are substantially parallel to each other. Yes. Note that the bobbin 13 and the middle core portion 11b are inserted into the coil 12 as described above.

[1.2.2. Case configuration]
The case 2 that houses the reactor 1 is a highly ductile case made of aluminum, magnesium alloy, or the like having an open top surface. In this case 2, as shown in FIG. 2, a body portion 31 arranged at a right angle to a contact portion 32 of a plate 3 to be described later inserted into a gap between the housed core 11 and the case 2 is provided by the bolt 4. Two bolt holes 21 are formed in order to be fixed to 2 (particularly, FIG. 2C). Further, fixing holes 22 with screws are formed in the four corners of the outer bottom portion of the case 2 (particularly, FIG. 2A).

  Further, as described above, as shown in FIGS. 1 and 2B, the screws 5 are inserted into the side surfaces of the case 2 with respect to the contact portions 32 of the plate 3 inserted in the gap between the case 2 and the core 11. Screw holes 23 are formed for this purpose.

[1.2.3. Plate configuration]
As shown in FIGS. 1 and 2, the plate 3 includes a main body portion 31 that supports the case 2 and the core 11 from the vertical direction, and a contact portion 32 that is bent downward and contacts the side surface portion of the reactor 1. Has been. 2B, the main body 31 is positioned in the horizontal direction in the figure, and the contact part 32 is positioned in the vertical direction in the figure.

  As shown in FIG. 1, the main body portion 31 is perpendicular to the contact portion 32 bent downward, and bolts 4 of the case 2 are formed on one side of the contact portion 32 before being bent by bolts 4. Bolt insertion holes 31 a for screwing and fixing to 21 are respectively formed. The plate 3 and the case 2 are fixed by the bolt 4 inserted through the bolt insertion hole 31a.

  The main body 31 has two pressing screw holes 31b for inserting pressing screws 6 as fixing means for pressing and fixing the core 11 to the bottom surface side of the case 2 and fixing the core 11. Is formed. Specifically, as shown in FIGS. 2B and 2C, in order to press the upper surface portion of the U-shaped core portion 11a of the core 11 with the pressing screw 6, it corresponds to the upper surface portion of the U-shaped core portion 11a. A pressing screw hole 31b is formed in the main body portion 31 at the position to be operated.

  A contact portion 32 perpendicular to the main body portion 31 is inserted into the gap between the case 2 and the reactor 1 and is in contact with the side surface of the U-shaped core portion 11a. A screw 5 is inserted as a biasing member toward the contact portion 32 through a screw hole 23 provided on the side surface of the case 2.

[1.3. Reactor mounting method]
Next, the fixing structure of the reactor will be described with reference to FIGS. 1 to 3 while showing a procedure for attaching the core 11 to the case 2 using the plate 3 or the like. FIG. 3 is an overall perspective view of the reactor in the present embodiment.

  First, the reactor 1 including the core 11 and the coil 12 is housed in the case 2 and inserted into the gap between the core 11 and the case 2 so that the contact portion 32 of the plate 3 contacts the side surface of the U-shaped core portion 11a. The Then, the bolt 4 is inserted into the two bolt insertion holes 31 a formed in the main body portion 31 of the plate 3, and the bolt 4 is attached to the case 2 so that the main body portion 31 is positioned on the upper surface side of the U-shaped core portion 11 a. The plate 3 and the case 2 are fixed from above and below by being screwed into the bolt holes 21.

  Furthermore, a pressing screw 6 is inserted into each of the two pressing screw holes 31 b formed in the main body portion 31 of the plate 3 fixed to the case 2, and the core 11 is connected to the bottom surface portion of the case 2 by the pressing screw 6. Pressed between. That is, in FIG. 2B, the pressing screw 6 which is a fixing means in the vertical direction in the drawing is inserted into the main body 31 from the same direction as the insertion direction of the reactor 1 into the case 2, and the core 11 is placed on the upper surface side. The core 11 is urged toward the bottom surface side of the case 2 by being pressed, and fixed.

  In this way, the plate fixed to the pressing screw 6 and the case 2 by pressing the upper surface of the U-shaped core portion 11a using the pressing screw 6 inserted through the pressing screw hole 31b of the main body 31. 3, the core 11 and the case 2 are fixed from the vertical direction. Therefore, even if the dimensions of the core 11 vary, it can be dealt with by adjusting the length of the pressing screw 6 inserted through the pressing screw hole 31b.

  Then, by inserting the screw 5 from the screw hole 23 formed on the side surface of the case 2 with respect to the contact portion 32 of the plate 3 inserted in the gap between the case 2 and the reactor 1, the contact portion 32. Is urged to the core 11 side, and the contact portion 32 of the plate 3 and the core 11 are fixed from the horizontal direction. That is, since the plate 3 is fixed to the case 2 from the vertical direction by the bolt 4, the contact portion 32 can be pressed against the side surface of the U-shaped core portion 11 a by pressing with the screw 5, and the contact portion 32. The core 11 and the case 2 are fixed by closely contacting the side surface of the core 11 opposite to the case 2. As a result, the reactor 1 is attached and fixed to the case 2 by using the plate 3, the pressing screw 6 and the screw 5, and a fixing structure as shown in FIG. 3 is realized.

  According to the present embodiment as described above, as shown in FIGS. 2B and 2C, the plate 3 having the main body portion 31 and the abutting portion 32 that forms a right angle with the main body portion 31, and horizontal in the figure. It is possible to fix the reactor 1 with respect to the case 2 from the two axial directions of the horizontal direction and the vertical direction by the directional screws 5 and the vertical bolts 4 and the pressing screws 6 in the drawing.

  That is, the upper surface of the core 11 is pressed by the pressing screw 6 inserted into the main body portion 31 of the plate 3 fixed to the case 2, and the core 11 is urged toward the bottom surface of the case 2 so that the core 11 can be lifted from the vertical direction. It is possible to prevent the reactor 1 including the core 11 from popping out. On the other hand, the screw 5 as an urging member is inserted from the side of the case 2 toward the abutting portion 32 inserted in the gap, and the abutting portion 32 is urged from the inner surface side of the case 2 to the core 11 side. By doing so, the core 11 can be fixed to the case 2 from the horizontal direction, and the horizontal vibration of the reactor 1 can be suppressed and fixed reliably.

  Therefore, since the core 11 is fixed to the case 2 using the plate 3, the screw 5 and the pressing screw 6, the space required for the leaf spring adopted as the prior art can be reduced, and the use of the filler can thereby be reduced. The amount can be reduced. Further, since a leaf spring is not employed, it is not necessary to use a mounting jig required when the leaf spring is inserted into the gap between the case 2 and the reactor 1. Thereby, it becomes possible to implement | achieve the fixing structure of the reactor 1 which can be assembled easily and can reduce cost with the simple structure which reduced the assembly man-hour.

  Further, since the reactor 1 is urged in the horizontal direction with respect to the case 2 by the plate 3 and the screw 5, the case 2 made of an aluminum alloy or the like is fixed in an extended state, and heat due to a temperature change of the reactor 1. It can cope with expansion and contraction. Specifically, when the reactor 1 is thermally expanded due to a high temperature, the difference in expansion rate between the case 2 and the reactor 1 is absorbed through the plate 3 and the screw 5, and the case 2 follows the expansion of the reactor 1. It corresponds to the thermal expansion by extending while. On the other hand, when the reactor 1 contracts due to low temperature, the difference in contraction rate between the case 2 and the reactor 1 is absorbed through the plate 3 and the screw 5, and the case 2 contracts while following the contraction of the reactor 1. Correspond with.

[2. Other Embodiments]
The present invention is not limited to the above embodiment in which the single plate 3 having the main body portion 31 and the contact portion 32 is fixed to the case 2 and the core 11, but the plate attached in FIGS. Similarly, an embodiment in which the plate 3 is attached to the case 2 is also included in a position opposite to the position 3. That is, the core 11 is attached to the case 2 by pressing the two U-shaped core portions 11a exposed at both ends of the pair of formed coils 12 from the plate 3 fixed on the opposite side from the vertical direction by the pressing screw 6. Fix it.

  Thereby, since the two U-shaped core parts 11a which form the core 11 are urged | biased to the case 2 bottom face side, the close_contact | adherence degree of the said core 11 and the case 2 increases, and the fixed degree of the reactor 1 with respect to the case 2 improves. In addition, a further heat dissipation effect can be expected.

  At this time, a similar screw hole 23 is opened at a position opposite to the screw hole 23 formed in the case 2 shown in FIG. 2B, and the plate attached at the opposite position as described above. An embodiment in which the screw 5 is inserted toward the three abutting portions 32 can also be adopted.

  Further, the present invention is not limited to the number of one screw 5 and two pressing screws 6 employed in the above embodiment as shown in FIGS. 1 to 3, but toward the abutting portion 32 of the plate 3. An embodiment in which the number of screws 5 to be inserted is plural or the number of pressing screws 6 that urge the core 11 from the upper surface to the bottom surface of the case 2 is one or three or more is also included.

The disassembled perspective view of the reactor in embodiment of this invention. The top view (a) of the reactor in embodiment of this invention, AA sectional drawing (b) in (a), and BB sectional drawing (c) in (a). The whole perspective view of the reactor in the embodiment of the present invention. The perspective view which shows the conventional reactor fixing structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reactor 2 ... Case 3 ... Plate 4 ... Bolt 5 ... Screw 6 ... Press screw 11 ... Core 11a ... Character core part 11b ... Middle core part 12 ... Coil 13 ... Bobbin 20 ... Leaf spring 21 ... Bolt hole 22 ... For fixation Hole 23 ... Screw hole 30 ... Receiving member 31 ... Body portion 31a ... Bolt insertion hole 31b ... Press screw hole 32 ... Abutting portion

Claims (7)

In the reactor fixing structure that fixes the reactor to the reactor case that is the support,
A plate for fixing the reactor to the reactor case;
The plate is disposed on the reactor case so as to be positioned on the upper surface side of the reactor, and the plate is disposed perpendicularly to the body portion, and is inserted into a gap between the reactor case and the reactor and is disposed on a side surface of the reactor. An abutting portion that abuts,
The main body has a fixing means for urging and fixing the reactor from the upper surface side of the reactor to the reactor case bottom surface side,
The reactor fixing structure, wherein the abutting portion is urged from an inner surface side of the reactor case to a reactor side by an urging member inserted from the outer side of the reactor case.   The reactor fixing structure according to claim 1, wherein the plate is made of a vibration damping alloy.   The reactor fixing structure according to claim 1, wherein the plate is fastened and fixed to the reactor case by a bolt.   The reactor fixing structure according to claim 1, wherein the reactor case is made of a ductile material.   The reactor fixing structure according to claim 4, wherein the reactor case is made of an aluminum alloy or a magnesium alloy.   2. The reactor according to claim 1, wherein the fixing means is a pressing screw that is inserted into the main body portion from an insertion direction of the reactor into the reactor case and presses the reactor toward a bottom surface side of the reactor case. Fixed structure.   The reactor fixing structure according to claim 1, wherein the biasing member is a screw.

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