JP6130347B2 - Reactor - Google Patents

Description

  The present invention relates to a reactor that suppresses misalignment when a reactor body is fixed to a case.

  Reactors are used in various applications including drive systems for hybrid vehicles and electric vehicles. For example, as a reactor used in an in-vehicle booster circuit, an annular core made of a magnetic material, a resin member covering the outer periphery of the annular core, and a coil wound around a part of the outer periphery of the annular core via the resin member In many cases, a reactor main body provided with a housing is housed in a metal case. In order to form a resin member by disposing resin around the annular core, a molding method is generally employed.

  In order to fix the reactor main body to the case, conventionally, a method has been adopted in which the reactor main body is accommodated in the case and fastened with a screw to be fixed to the case. That is, the reactor body is provided with a metal fixture having a screw hole at the tip, and the screw hole is aligned with the screw hole provided in the case, and the screw is inserted into both screw holes. The reactor main body is fixed to the case by fastening with.

JP 2013-149868 A

  As described above, when fastening with screws, the reactor body may move relative to the case. Therefore, even if the screw hole of the fixing tool is aligned with the screw hole of the case, the screw hole of the fixing tool and the screw hole of the case at an unfastened location may be misaligned and the screw may not be inserted.

  Therefore, conventionally, the fixture has been fastened by two types of fixtures, one having a screw hole with a small hole diameter serving as a main reference and one having a screw hole with a large hole diameter serving as a secondary reference. For example, in the case where the screw holes of the fixing tool are provided at the four corners of the reactor and screws are fastened to the case at the four locations, first, the screw holes of the fixing tool and the screw holes of the case are matched. Next, the reactor main body is accommodated in the case. Next, the main reference screw hole is tightened, and then the sub reference screw hole positioned diagonally to the main reference screw hole is tightened. When tightening the main reference screw hole, for example, the reactor main body rotates in the same direction as the screw tightening direction with the position of the main reference screw hole being the center of the circle. However, since the hole diameter of the secondary reference screw hole is increased, the screw hole of the corresponding case can be faced from the secondary reference screw hole even if there is a slight deviation, enabling screw fastening Become.

  In this way, by making the tolerances of the screw hole diameters of the fixture different, the reactor body is positioned with respect to the case without requiring re-alignment.

  However, the technique using the tolerance of the screw hole diameter of the fixture needs to produce fixtures having different screw hole diameters. Therefore, at least two molds must be prepared, and there is a problem that the manufacturing cost increases. It was not possible to meet the desire to reduce manufacturing costs by using as many fixtures as possible.

  Also, bend the tip of the fixture and insert the tip into a recess in the case to position the reactor body relative to the case, or provide a protrusion or dent on the flat part of the fixture. A method of positioning by fitting into a recess provided in the case has also been adopted. However, it is difficult to produce a fixture having such a special shape. In addition, a mold for molding these special fixtures is required separately, and there is a problem that the manufacturing cost increases.

  The present invention has been made in order to solve the above-described problems, and its purpose is to fix the reactor main body to the case using a common fixture as much as possible, thereby reducing the manufacturing cost. An object of the present invention is to provide a reactor capable of reducing and suppressing a positional shift at the time of screw fastening.

The reactor of this invention is a reactor provided with the reactor main body provided with the core and the coil with which the said core was mounted | worn, and the case which accommodates the said reactor main body, Comprising: It has the following structures, It is characterized by the above-mentioned.
(1) The reactor body includes a plurality of fixing portions provided with screw through holes.
(2) The case is provided with a plurality of pedestal portions on which the fixing portions are provided, in which screw holes are provided.
(3) The diameters of the screw through holes of the plurality of fixing portions are the same.
( 4 ) The reactor main body and the case have the fixing portion mounted on the pedestal portion and are screwed together via the screw through hole and the screw hole.
( 5 ) The pedestal portion is provided with a wall along at least a part of the outer shape of the fixed portion.

The present invention may have the following configuration.
( 6 ) The fixing portion has a shape having a pair of parallel two sides and a side connecting the two sides,
At least two of the pedestal portions are provided with two parallel walls along the two sides of the fixed portion so as to sandwich the fixed portion.
( 7 ) Any two of the pedestal portions are provided with a wall along a side connecting the two sides of the fixed portion.
( 8 ) The fixed portion is provided at four corners of the reactor body, and the pedestal portion is provided at the four corners of the case.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing manufacturing cost, the reactor which can suppress the position shift at the time of screw fastening can be obtained.

It is a perspective view which shows the whole structure of the reactor which concerns on 1st Embodiment. It is a disassembled perspective view which shows the whole structure of the reactor which concerns on 1st Embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on 1st Embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment. It is the schematic diagram which planarly viewed the reactor which concerns on other embodiment.

  Hereinafter, a reactor according to an embodiment of the present invention will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Schematic configuration]
FIG. 1 is a perspective view showing the overall configuration of the reactor according to the present embodiment, and FIG. 2 is an exploded perspective view thereof. FIG. 3 is a schematic view of the reactor according to the present embodiment viewed in plan. However, a part of the case 4 is omitted.

  A reactor is an electromagnetic component that converts electric energy into magnetic energy and stores and discharges it, and is used for voltage step-up / step-down and the like. The reactor according to the present embodiment is a large-capacity reactor used in, for example, a drive system for a hybrid vehicle or an electric vehicle. The reactor is a main component of the booster circuit mounted on these automobiles. The booster circuit has a semiconductor switching element such as an IGBT in addition to the reactor. The reactor turns on and off the semiconductor switching element at high speed, thereby converting electric energy supplied from an external power source into magnetic energy, repeatedly storing and releasing the energy, and boosting the voltage.

  The reactor is configured to be fixed in a state where the reactor main body 1 is accommodated in the case 4. As shown in FIGS. 1 and 2, the reactor main body 1 covers the outer periphery of the annular core 10, the coil 5 attached to a part of the outer periphery of the annular core 10, and the annular core 10 and the coil 5. And fixing portions 31 a to 31 d for fixing the reactor main body 1 to the case 4.

  The annular core 10 is an annular magnetic body, and has a pair of parallel straight portions and a U-shaped connecting portion that connects these straight portions to a part of the annular shape. As shown in FIG. 2, the linear portion around which the coil 5 is wound in the annular core 10 is a leg portion where magnetic flux is generated. The legs of the annular core 10 of this embodiment are a pair of linear portions wound around a pair of parallel coils 51a and 51b. The reason why the magnetic flux is generated in the leg portion is that when a current flows through the coil 5, a magnetic flux interlinking the coil 5 is generated. The U-shaped connecting portion around which the coil 5 is not wound is a yoke portion through which the magnetic flux generated at the leg portion passes. That is, the yoke portion connects the pair of straight portions. An annular closed magnetic circuit is formed in the annular core 10 by the magnetic flux generated at the leg portion passing through the yoke portion.

  The resin member 2 covers the outer periphery of the annular core 10 and has an annular shape as the entire annular core 10. That is, it has a pair of parallel straight portions and a connecting portion that connects these straight portions. In the present embodiment, the resin member 2 is divided into two parts, and includes a first separator 21 and a second separator 22.

  The first separator 21 includes a pair of straight portions 21a and 21b and a U-shaped connecting portion 21c that connects the straight portions 21a and 21b. The second separator 22 has a C-shaped connecting portion 22a. The straight portions 21a and 21b are portions around which the coil 5 is wound, and are also referred to as bobbins. The pair of straight portions 21a and 21b is a pair of straight portions of the resin member 2, and the connecting portions 21c and 22a are connecting portions that connect the pair of straight portions.

  Thus, the reactor main body 1 has an annular shape including a pair of parallel linear portions and a connecting portion connecting the linear portions, following the shape of the annular core 10.

  Such a reactor main body 1 is fixed in a case 4 having a substantially rectangular parallelepiped accommodation space formed of a metal having high thermal conductivity and light weight such as an aluminum alloy. For this fixing, plate-like metal fittings 3 extending in one direction are embedded in the connecting portions 21c and 22a of the resin member 2, and the tip portions protruding from the connecting portions 21c and 22a of the metal fittings 3 are fixed portions 31a. ~ 31d.

  The fixing portions 31a to 31d have a substantially quadrangular shape, and have a shape having a pair of parallel two sides and a side connecting the two sides. Screw through holes 33a to 33d are provided in the fixing portions 31a to 31d.

  The case 4 accommodates the reactor body 1 and is provided with pedestal portions 42a to 42d for mounting the fixing portions 31a to 31d at the four corners thereof. Screw holes 421a to 421d are provided in the base portions 42a to 42d. The reactor body 1 and the case 4 are fastened by screws 35a to 35d through screw through holes 33a to 33d and screw holes 421a to 421d in a state where the fixing portions 31a to 31d are placed on the pedestals 42a to 42d. Fixed.

  Here, the pedestal portions 42a to 42d are provided with a wall 43 along at least a part of the outer shape of the fixing portions 31a to 31d. For this reason, in the state in which the fixing portions 31a to 31d are placed on the pedestal portions 42a to 42d, the wall 43 is located at a part of the periphery of the fixing portions 31a to 31d. Therefore, when the reactor body 1 is screwed to the case 4, at least any one of the fixing portions 31 a to 31 d comes into contact with the peripheral wall 43, so that the displacement of the reactor body 1 is suppressed. That is, the wall 43 functions as a stopper.

  A filler is filled and solidified in a gap between the reactor body 1 and the case 4 to form a filled resin portion 6. As the filler, a resin that is relatively soft and has high thermal conductivity is suitable for ensuring heat dissipation performance of the reactor body 1 and reducing vibration propagation from the reactor body 1 to the case 4.

[1-2. Detailed configuration]
Next, each structure of the reactor of this embodiment is demonstrated in detail. The annular core 10 is a magnetic body such as a dust core, a ferrite core, or a laminated steel plate. As shown in FIG. 2, the annular core 10 has a plurality of divided cores 11 to 13 and a plurality of spacers 14, and the spacers 14 are arranged between the divided cores 11 to 13 to be annular by an adhesive. So connected.

  The split cores of the present embodiment are a plurality of I-shaped cores 13 constituting left and right leg portions and two U-shaped cores 11 and 12 constituting yoke portions. The I-shaped core 13 is a substantially rectangular parallelepiped magnetic body. The U-shaped cores 11 and 12 are magnetic bodies having a U-shaped cross section. The corners of these U-shaped cores 11 and 12 are chamfered.

  In addition, the leg part of the annular core 10 is a part around which the coil 5 is wound as described above. In this embodiment, in addition to the two I-shaped cores 13, the ends of the U-shaped cores 11 and 12. Contains parts. The yoke portion of the annular core 10 is a curved portion of the U-shaped cores 11 and 12 where the coil 5 is not wound. However, depending on the number of turns of the coil 5 or the number of I-shaped cores 13, a plurality of I-shaped cores 13 may be used as legs, and the U-shaped cores 11 and 12 may be used as yoke parts. Which part of the split core is used as the leg part and the yoke part can be appropriately changed depending on the design.

  The spacer 14 is a plate-shaped gap spacer. The spacer 14 is disposed between the divided cores 11 to 13 and is bonded and fixed to the bonding end surfaces of the divided cores 11 to 13 on both sides of the spacer 14 with an adhesive. The spacer 14 provides a magnetic gap having a predetermined width between the divided cores 11 to 13 to prevent a decrease in inductance on the high current side of the reactor. As a material of the spacer 14, a non-magnetic material, ceramic, non-metal, resin, carbon fiber, or a composite material of two or more of these or gap paper can be used. Note that the spacer 14 is not necessarily provided.

  The resin member 2 is a member that covers the outer periphery of the annular core 10 with resin. Therefore, the resin member 2 is formed in an annular shape following the shape of the annular core 10. A coil 5 is wound around a part of the outer periphery of the resin member 2, and the resin member 2 insulates the annular core 10 from the coil 5.

  Examples of the resin include an epoxy resin, an unsaturated polyester resin, a urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulphide), and PBT (Polybutylene Terephthalate).

  The resin member 2 is divided into two. That is, the resin member 2 is configured by molding the substantially U-shaped first separator 21 and the substantially C-shaped second separator 22 separately and butting the ends of each other. Is done. The first separator 21 and the second separator 22 are formed separately in order to accommodate the I-shaped core 13 constituting the leg portion of the annular core 10 and by fitting the coil 5 therein. This is because the coil 5 is attached to the resin member 2.

  Specifically, the first separator 21 includes a pair of cylindrical straight portions 21a and 21b and a connecting portion 21c that connects the straight portions 21a and 21b. The second separator 22 has a C-shaped connecting portion 22a and a hook 22b. The hook 22b is used for positioning a temperature sensor 9 described later. The hook 22 b may be formed as a separate member from the second separator 22 and provided between the coils 51 a and 51 b in the reactor body 1.

  U-shaped cores 11 and 12 are embedded in the connecting portions 21c and 22a by a molding method. In other words, the outer peripheral portions of the U-shaped cores 11 and 12 covered with the connecting portions 21c and 22a are fitted with the inner periphery of the connecting portions 21c and 22a. However, the adhesion end faces of the U-shaped cores 11 and 12 are exposed.

  Inside the straight portions 21 a and 21 b, I-shaped cores 13 and spacers 14 are alternately stacked along the linear direction of the annular core 10. Openings are respectively provided at the ends of the straight portions 21a and 21b, and the I-shaped core 13 and the spacer 14 are inserted from the openings of the straight portions 21a and 21b.

  The fixing portions 31 a to 31 d are used for fixing the reactor main body 1 to the case 4. In the present embodiment, the fixing portions 31a to 31d are constituted by both end portions of the plate-like metal fitting 3 extending in one direction.

  The plate-like metal fitting 3 has a flat central portion and both tip portions constituting the fixing portions 31a to 31d, and is bent between the center portion and both tip portions. The plate-shaped metal fitting 3 has a substantially rectangular shape, and the fixing portions 31a to 31d configured at both ends thereof have a pair of parallel sides and a side connecting the two parallel sides. In the present embodiment, the fixed portions 31 a to 31 d are parallel to a direction X (also simply referred to as a direction X) in which the linear portion of the reactor body 1 extends, and a pair of parallel sides Is provided in the resin member 2 so as to be parallel to a direction Y (also simply referred to as a direction Y) orthogonal to the direction X.

  Specifically, as shown in FIGS. 1 and 2, the plate-shaped metal fitting 3 is embedded so that the center portion thereof is positioned above the U-shaped cores 11 and 12 by, for example, a molding method, Both end portions of the metal fitting protrude from the surfaces of the connecting portions 21c and 22a. Of the protruding portions, bent portions bent from the surfaces of the connecting portions 21c and 22a toward the bottom surfaces of the U-shaped cores 11 and 12 absorb the linear expansion of each member such as the annular core 10 and the resin member 2. A total of four fixed portions 31a to 31d are formed at the tip of the bent portion.

  The fixing portions 31a to 31d are provided with screw through holes 33a to 33d into which the screws 35a to 35d are inserted, and the hole diameters thereof are the same. The fixing portions 31 a to 31 d are placed on pedestal portions 42 a to 42 d provided at the four corners of the case 4. The screws 35 a to 35 d are inserted into the screw through holes 33 a to 33 d and fastened, and the reactor body 1 is fixed to the case 4.

  On the surface of the connecting portion 21c, a resin connector 8 capable of connecting other members is provided. In this embodiment, a temperature sensor 9 is attached to the connector 8. The temperature sensor 9 includes a temperature detection unit 9a and a lead wire 9b connected to the temperature detection unit 9a.

  The temperature detector 9a is positioned by the hook 22b and is disposed between the coils 51a and 51b, and detects the temperature inside the reactor. The lead wire 9b is wound around the hook 22b, the end is attached to the connector 8 through the positioning through hole 21d provided in the connecting portion 21c, and the temperature information detected by the temperature detecting portion 9a is transmitted to the outside of the reactor. To do. As the temperature sensor 9, for example, a thermistor whose electric resistance changes with respect to a temperature change can be used, but is not limited thereto.

  The coil 5 is a conducting wire having an insulating coating. In the present embodiment, the coil 5 is a flat wire edgewise coil. However, the wire material and winding method of the coil 5 are not limited to the rectangular wire edgewise coil, and may be in other forms. The coil 5 is wound around the outer periphery of the split core that forms the leg portion of the annular core 10. More specifically, in the present embodiment, the coil 5 includes left and right coils 51a and 51b. These coils 51 a and 51 b are wound around the outer periphery of a pair of linear portions of the resin member 2.

  The coils 51a and 51b are each constituted by a single enamel-coated copper wire and are connected by a connecting wire 51c made of the same material as the coils 51a and 51b. The end portion 52 a of the coil 51 a and the end portion 52 b of the coil 51 b are pulled out above the connecting portion 22 a of the second separator 22 and are connected to the end portions of the bus bars 72 a and 72 b arranged on the terminal block 71.

  That is, the terminal block 71 is substantially Z-shaped when viewed from the side, the upper side portion is provided above the connecting portion 22a, the middle side is provided along the side wall of the case 4, and the lower side portions are bolts 73a and 73b. Thus, the flat plate portion 44 is fixed to the bottom surface of the case 4. On the bottom surface, which is the lower side portion of the terminal block 71, a protrusion (not shown) for positioning is provided. The bus bars 72a and 72b are embedded in the terminal block 71 by a molding method leaving both ends. The flat plate portions 74a and 74b, which are one end of the bus bar 72a, are fitted into the recesses 75a and 75b provided in the terminal block 71, and the other end rises toward the end portions 52a and 52b of the coils 51a and 51b. It is welded to 52b.

  The flat plate portions 74a and 74b are respectively provided with screw insertion holes. By inserting and fastening screws into these screw insertion holes, the flat plate portions 74a and 74b are connected to wiring of an external device such as an external power source. When power is supplied from an external power source, a current flows through the coils 51 a and 51 b to generate a magnetic flux penetrating the coils 51 a and 51 b, and an annular closed magnetic circuit is formed in the annular core 10.

  Next, the case 4 will be described in detail. The case 4 has a bathtub shape with an opening on the upper surface, accommodates the reactor body 1, and supports the reactor body 1. The case 4 is made of a light metal having a high thermal conductivity such as an aluminum alloy. The case 4 has thermal conductivity in order to release heat generated by energization of the coil 5. Specifically, the case 4 includes an accommodating portion 41, pedestal portions 42 a to 42 d, a wall 43, and a flat plate portion 44.

  The accommodating part 41 is provided with an opening, and the reactor main body 1 is accommodated from the opening. The pedestal portions 42a to 42d are portions on which the fixing portions 31a to 31d of the reactor main body 1 are placed. The pedestal portions 42 a to 42 d are provided at the four corners of the accommodating portion 41 so as to be positioned at the four corners of the reactor body 1. In other words, the pedestal portions 42 a to 42 d are provided at the four corners of the case 4 so as to protrude from the outer wall of the case 4.

  The pedestal portions 42a to 42d are positioned higher than the bottom surface of the accommodating portion 41, and are flat so that the fixing portions 31a to 31d can be placed. The shapes of the flat portions in plan view are the fixing portions 31a to 31d. It has a copied shape. The pedestal portions 42a to 42d support the reactor main body 1 in a state where the fixing portions 31a to 31d are placed.

  That is, the distance from the bottom surface of the reactor body 1 to the fixing portions 31a to 31d is shorter than the distance from the bottom surface of the housing portion 41 to the pedestal portions 42a to 42d. Therefore, in a state where the fixing portions 31 a to 31 d are placed on the pedestal portions 42 a to 42 d, a gap is generated between the storage portion 41 and the reactor body 1. Accordingly, the reactor main body 1 is supported by the pedestals 42a to 42d in a state where the reactor main body 1 floats in the air in the accommodating portion 41. In addition, the filling resin part 6 is arrange | positioned in the said clearance gap, and the reactor main body 1 is supported also by the filling resin part 6. FIG.

  Screw holes 421a to 421d are provided in the pedestal portions 42a to 42d, and are aligned with the screw through holes 33a to 33d of the fixing portions 31a to 31d and fastened with screws 35a to 35d.

  The wall 43 will be described with reference to FIGS. The wall 43 is provided on the pedestal portions 42a to 42d so as to protrude from the edges of the pedestal portions 42a to 42d along at least part of the outer shape of the fixed portions 31a to 31d. The wall 43 is a stopper that suppresses the movement of the fixing portions 31 a to 31 d when the reactor body 1 is fixed to the case 4.

  More specifically, the wall 431a of the pedestal 42a and the wall 431b of the pedestal 42b extend from the bottom surface of the case 4 as the outer wall of the case 4 along the side connecting the two parallel sides of the fixing portions 31a and 31b. Is provided. In other words, the walls 431a and 431b are provided in parallel with the direction X so as to sandwich the fixing portions 31a and 31b from the outside, and the direction Y and the fastening direction θ1 of the screws 35a to 35d and the opposite direction θ2 thereof. The position shift of Further, the wall 431c of the pedestal 42d is provided on the same straight line as the wall 431a of the pedestal 42a, and suppresses a positional deviation in the direction Y from the fixed portion 31c to the fixed portion 31d. Further, the displacement in the clockwise direction when the fastening direction θ1 of the screws 35a to 35d, that is, the reactor main body 1 is viewed in plan is suppressed.

  The walls 432a and 432b of the pedestal portion 42c and the walls 433a and 433b of the pedestal portion 42d are spaced apart by about the width in the X direction of the fixing portions 31c and 31d, and are provided in parallel with the direction Y, respectively. The two walls 432a and 432b are provided along a pair of two parallel sides of the fixing portion 31c so as to sandwich the fixing portion 31c, and the two walls 433a and 433b are arranged so as to sandwich the fixing portion 31d. It is provided along a pair of parallel two sides 31d. Therefore, when the reactor main body 1 is fixed to the case 4, the outer edges of the fixing portions 31c and 31d hit at least one of the walls 432a, 432b, 433a, and 433b, so that the positional deviation in the direction X of the reactor main body 1 is suppressed. Further, the displacement of the screws 35a to 35d in the fastening direction θ1 and the opposite direction θ2 is suppressed.

  One end portions of the walls 432a and 432b are connected to the outer wall surface of the case 4, and the wall 43 is not provided between the walls 432a and 432b of the pedestal portion 42c. On the other hand, the walls 433a and 433b of the pedestal portion 42d are connected to the wall 431c, and these walls 433a, 431c and 433b are connected like a mountain range to form the wall 43 of the pedestal portion 42d. In other words, the wall 43 of the pedestal portion 42d is provided along its outer shape so as to surround the fixed portion 31d.

  Note that the wall 43 may be provided with a slight gap between the outer edges of the fixing portions 31a to 31d. The slight gap is a gap that allows the screws 35a to 35d to be inserted into the screw holes 421a to 421d of the pedestal portions 42a to 42d from the screw through holes 33a to 33d even if the position of the reactor body 1 is displaced.

  The flat plate portion 44 is provided so as to extend the bottom surface of the case 4. The flat plate portion 44 has an L shape when the case 4 is viewed in plan view. The flat plate portion 44 has a large-diameter opening 44a for positioning the terminal block 71, a small-diameter opening 44b, and screw fastening. A screw hole 44c for fixing is provided. A protrusion (not shown) provided on the bottom surface of the terminal block 71 is fitted into each of the large-diameter and small-diameter openings 44a and 44b, and the terminal block 71 is fixed to the case 4 by fastening with screws through the screw holes 44c. The

[1-3. Effect]
(1) The reactor of this embodiment is provided with the reactor main body 1 provided with the annular core 10 and the coil 5 with which this annular core 10 was mounted | worn, and the case 4 which accommodates the reactor main body 1, The reactor main body 1 is The case 4 includes a plurality of fixing portions 31a to 31d provided with screw through holes 33a to 33d, and the case 4 includes a plurality of pedestal portions 42a for mounting the fixing portions 31a to 31d provided with screw holes 421a to 421d. ˜42d, the reactor body 1 and the case 4 are fixed to the pedestal portions 42a to 42d with the fixing portions 31a to 31d, and are fastened with screws through the screw through holes 33a to 33d and the screw holes 421a to 421d. 42a to 42d are provided with a wall 43 along at least a part of the outer shape of the fixing portions 31a to 31d placed on the pedestal portions 42a to 42d.

  Accordingly, even when the reactor main body 1 is displaced when the reactor main 1 is screwed to the case 2, the fixing portions 31 a to 31 d hit the wall 43 of the pedestal portions 42 a to 42 d, and thus the screw through holes 33 a of the fixing portions 31 a to 31 d. It is possible to avoid a situation in which the screws 35a to 35d cannot be inserted due to a mismatch between .about.33d and the screw holes 421a to 421d of the case 4. Therefore, in order to cope with the displacement of the reactor main body 1, it is not necessary to separately prepare a fixing part having a different hole diameter of the screw through hole. Therefore, since the cost required for producing the mold for the fixed part can be reduced, a reactor capable of reducing the manufacturing cost can be obtained.

(2) The fixing portions 31a to 31d have a shape having a pair of parallel two sides and a side connecting the two sides, and at least two pedestal portions 42a to 42d include the pedestal portions 42a to 42d. Two parallel walls 43 along a pair of parallel two sides of the fixing portions 31a to 31d are provided so as to sandwich the corresponding fixing portions 31a to 31d. In particular, in the present embodiment, the fixing portion 31c is sandwiched between the walls 432a and 432b, and the fixing portion 31d is sandwiched between the walls 433a and 433b.

  Thereby, when the reactor main body 1 is fixed to the case 4, even if the reactor main body 1 is displaced in the direction X, the fixing portions 31c and 31d hit at least one of the walls 432a, 432b, 433a, and 433b. Deviation can be suppressed. Further, even when the reactor body 1 rotates in a plane, the fixing portions 31c and 31d come into contact with at least one of the walls 432a, 432b, 433a, and 433b, so that the clockwise rotation θ1 and the counterclockwise rotation θ2 are also suppressed. can do. Furthermore, for example, the walls 432a and 432b are provided only in parallel and can be provided with a minimum number of walls, so that the space can be reduced and the reactor can be downsized.

(3) Any two of the pedestal portions 42a to 42d are provided with the walls 43 along the side connecting the pair of parallel sides of the fixing portions 31a to 31d. In particular, in this embodiment, the walls 431a to 431c are provided. Thereby, when the reactor main body 1 shifts in the direction Y, the fixing portions 31a and 31c hit the walls 431a and 431c, or the fixing portion 31b hits the wall 431b, so that the displacement of the reactor main body 1 in the direction Y is suppressed. Can do. Even when the reactor main body 1 rotates in a plane, when the clockwise rotation θ1, for example, the fixed portion 31b hits the wall 431b, and when it is counterclockwise θ2, the fixed portion 31a hits the wall 431a. Further, the rotation of clockwise θ1 and counterclockwise θ2 can be suppressed.

(4) The fixing portions 31 a to 31 d are provided at the four corners of the reactor body 1, and the pedestal portions 42 a to 42 d are provided at the four corners of the case 4. Thereby, since the dead space of the both sides of the round part of the U-shaped cores 11 and 12 can be utilized, size reduction of a reactor is attained.

[2. Other Embodiments]
The present invention is not limited to the first embodiment, and includes other embodiments described below. In addition, the present invention also includes a combination of the following other embodiments.

(1) In the first embodiment, the two fixing portions 31a and 31b are constituted by a single plate-like metal fitting 3a, and the two fixing portions 31c and 31d are constituted by a single plate-like metal fitting 3b. However, each of the fixed portions 31 a to 31 d may be configured by a single plate-shaped metal fitting 3. In that case, for example, one end of the plate-shaped metal fitting 3 is embedded in the resin member 2, and the tip protruding from the resin member 2 is used as a fixing portion.

(2) In 1st Embodiment, although the fixing | fixed part 31a-31d was comprised with the metal fitting 3, you may comprise with resin.

(3) In 1st Embodiment, although the base parts 42a-42d were provided in the high position from the bottom face of the case 2, it is not limited to this. That is, the pedestal portion 42 may be provided on the bottom surface of the case 2.

(4) Although the wall 43 of the first embodiment is provided as shown in FIG. 3, it is sufficient if the displacement of the reactor body 1 can be suppressed, and the configuration other than the wall 43 is the same, as shown in FIGS. 4 to 7. May be provided. That is, as shown in FIG. 4, the wall 43 of the pedestal portions 42a and 42c is parallel to the direction Y along a pair of parallel sides of the fixing portions 31a and 31c so as to sandwich the fixing portions 31a and 31c. The wall 43 of the pedestal portions 42b and 42d may be provided in parallel with the direction X along the side connecting the pair of parallel sides of the fixing portions 31b and 31d. As shown in FIG. 5, the wall 43 of the pedestal portion 42a is provided so as to surround the periphery of the three sides of the fixed portion 31a, the walls 43 of the pedestal portions 42b and 42c are provided in a direction parallel to the direction X, and the pedestal portion 42d. The wall 43 may be provided parallel to the direction Y so as to sandwich the fixing portion 31d.

  Further, as shown in FIG. 6, the wall 43 of the pedestal portion 42a is provided in parallel with the direction Y, the walls 43 of the pedestal portions 42b and 42c are provided in a direction parallel to the direction X, and the wall 43 of the pedestal portion 42d is provided. Similarly to the first embodiment, the fixing portion 31d may be provided so as to surround the periphery of the three sides. As shown in FIG. 7, the wall 43 of the pedestal portion 42a is provided in parallel to the direction Y, the wall 43 is not provided in the pedestal portion 42b, the wall 43 of the pedestal portion 42c is provided in parallel to the direction X, and the pedestal portion 42d. Similarly to the first embodiment, the wall 43 may be provided so as to surround the periphery of the three sides of the fixing portion 31d.

  Moreover, the form which changed the installation location of the wall 43 shown in FIGS. 4-7 to left-right symmetry centering on the centerline C parallel to the direction X is also included in the scope of the present invention.

(5) In the first embodiment, four fixing portions 31a to 31d are provided, but the embodiment in the case of three and the embodiment in the case of two are also included in the scope of the present invention. For example, when there are three fixing portions, as shown in FIG. 8, the fixing portions 31a and 31b are provided at the same positions as the fixing portions 31a and 31b of the first embodiment, and the fixing portion 31c is the connecting portion 22a. It is provided so as to protrude in the X direction from the central portion of the. Similarly, the pedestal portions 42a to 42c are provided at positions where the fixing portions 31a to 31c can be placed.

  Each of the fixing portions 31a to 31c is constituted by, for example, a substantially rectangular piece of metal, one end of which is embedded in the connecting portions 21c and 22a, and the other end is provided with screw through holes 33a to 33c. A wall 43 is provided on the periphery of the fixing portions 31a to 31c so as to surround the three sides of the fixing portions 31a to 31c. That is, the walls 43 of the pedestals 42a to 42c are configured by connecting the walls 434a to 434c, the walls 435a to 435c, and the walls 436a to 436c, respectively.

  Specifically, the walls 434a and 434b are spaced about the width in the direction X of the fixing portions 31a and 31b in parallel with the direction Y so that the fixing portions 31a are sandwiched and the walls 435a and 435b are sandwiched between the fixing portions 31b. Is provided. The wall 434c is provided in parallel with the direction X so as to connect the walls 434a and 434b, and the wall 435c is provided so as to connect the walls 435a and 435b. The walls 436a and 436b are provided in parallel with the direction X so as to sandwich the fixing portion 31c, and the wall 436c is provided in parallel with the direction Y so as to connect the walls 436a and 436b.

  As described above, even when the number of the fixing portions 31a to 31c is three, it is possible to suppress the displacement in the direction X and the direction Y and the fastening direction θ1 of the screws 35a to 35d and the opposite direction θ2. Note that at least one of the walls 434c, 435c, and 436c may not be provided, and in this case as well, the positional deviation in the four directions can be similarly suppressed, and the wall of the portion serving as the outer edge of the reactor is provided. Since it is not provided, space can be saved correspondingly, and it is possible to cope with severe design conditions.

  Furthermore, as shown in FIG. 9, the same applies to the case where there are two fixing portions 31a and 31c. In this case, the fixing portions 31 a and 31 c are provided at diagonal positions of the four corners of the reactor body 1. Similarly, the pedestals 42 a and 42 c are provided at diagonal positions of the case 4. The wall 43 provided around the fixed portion 31a is provided in parallel with the direction X so as to be connected to the walls 437a and 437b provided in parallel with the direction Y and the walls 437a and 437b so as to sandwich the fixed portion 31a. Wall 437c. The wall 43 provided around the fixed portion 31c is parallel to the direction X so as to be connected to the walls 438a and 438b provided parallel to the direction Y and the walls 438a and 438b so as to sandwich the fixed portion 31c. And a wall 438c provided on the wall.

(6) In the first embodiment and the other embodiments shown in FIGS. 4 to 9, the wall 43 is continuously provided so as to extend in the direction X or the direction Y. You may comprise by several protrusion. In the case of providing a plurality of protrusions, the wall 431a provided on the pedestal portion 42a of the first embodiment will be described as an example. The wall 431a is provided so as to extend in the direction X. A plurality of protrusions protruding upward from the pedestal portion 42a may be provided apart from each other on a straight line.

(7) In the first embodiment and the other embodiments described above, the screw through holes 33a to 33d of the fixing portions 31a to 31d have a round shape, but may have a shape in which a part of the round shape is notched. good. In other words, the shape of the fixing portions 31a to 31d may be a saddle shape that is formed by bifurcating a part of any of the pair of parallel two sides and the side connecting them.

(8) In the first embodiment and the other embodiments described above, the U-shaped core and the I-shaped core are used as the split cores in order to configure the annular core 10, but the present invention is not limited to this. That is, the annular core 10 only needs to be configured by abutting a plurality of divided cores, and a core having a shape that can form the E-shaped core, the T-shaped core, or other annular core 10 is used as the divided core. be able to.

(9) In the first embodiment and the other embodiments described above, the annular core 10 having one ring is used. However, a ring having three or more legs such as an E-shaped core is used. May be an annular core 10 formed into two θ shapes.

DESCRIPTION OF SYMBOLS 10 Ring core 11, 12 U-shaped core 13 I-shaped core 14 Spacer 2 Resin member 21 1st isolation | separation body 21a, 21b Linear part 21c Connection part 21d Positioning through-hole 22 2nd isolation | separation body 22a Connection part 22b Hook 31a -31d Fixing part 33a-33d Screw through hole 35a-35d Screw 3 (3a, 3b) Metal fitting 4 Case 41 Housing part 42a-42d Pedestal part 421a-421d Screw hole 43 Wall 431a-431c Wall 432a Wall 432b Wall 433a Wall 433b Wall 434a to 434c Wall 435a to 435c Wall 436a to 436c Wall 437a to 437c Wall 438a to 438c Wall 44 Flat plate portion 44a Large diameter opening portion 44b Small diameter opening portion 44c Screw hole 5 Coil 51a, 51b Coil 52a, 52b End portion 6 Filling Resin portion 71 Terminal blocks 72a and 72b Bus bar 73 , 73b Bolts 74a, 74b Flat plate portions 75a, 75b Recess 8 Connector 9 Temperature sensor 9a Temperature detection portion 9b Lead wire C Center line X The direction in which the linear portion of the reactor body 1 extends Y The direction in which the linear portion of the reactor body 1 extends is orthogonal Direction θ1 Screw fastening direction θ2 Reverse direction of screw fastening direction

Claims (4)

A reactor body comprising a core and a coil attached to the core;
A case for housing the reactor body;
With
The reactor body includes a plurality of fixing portions provided with screw through holes,
The case is provided with a plurality of pedestal portions for mounting the fixing portion provided with screw holes,
The diameters of the screw through holes of the plurality of fixing portions are the same,
In the reactor main body and the case, the fixed portion is placed on the pedestal portion, and is screwed through the screw through hole and the screw hole,
The pedestal part is provided with a wall along at least a part of the outer shape of the fixed part placed on the pedestal part;
Reactor characterized by. The fixed portion has a shape having a pair of parallel two sides and a side connecting the two sides,
At least two of the pedestal portions are provided with two parallel walls along the two sides of the fixed portion so as to sandwich the fixed portion;
The reactor according to claim 1. Any two of the pedestal portions are provided with a wall along the side connecting the two sides of the fixed portion,
The reactor according to claim 2. The fixing portions are provided at four corners of the reactor body,
The pedestal is provided at four corners of the case;
The reactor according to claim 3.

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