JP6528614B2 - Mounting structure of winding parts and power converter provided with this mounting structure - Google Patents

Description

  The present invention relates to a mounting structure of winding parts for fixing a winding part such as a reactor to a housing, and a power conversion device provided with the mounting structure.

In a power conversion device such as an AC / DC converter mounted on a hybrid vehicle or an electric vehicle, winding parts such as a reactor are accommodated in a housing, and the winding parts are fixed to the housing Is common. In the attachment structure of the winding parts, since the winding parts have a relatively heavy weight, it is required that the vibration resistance after fixing the winding parts to the housing is good.
The reactor is a component including a ring-shaped core and a coil wound along an inner circumferential surface and an outer circumferential surface of the core alternately.

As a mounting structure which fixes a reactor to a housing | casing, the structure of patent document 1 is known, for example.
In the mounting structure of the reactor of Patent Document 1, the reactor is mounted on the top surface of the housing, and at least two flat spring mounting portions are provided on the top surface of the housing so as to sandwich the reactor therebetween. Then, a plate spring is disposed so as to cover the upper portion of the reactor, and both ends of the plate spring are attached to the plate spring attachment portion to generate a spring force in the plate spring. While fixed.

JP 2007-227640 A

By the way, when manufacturing a reactor, since bending R occurs when bending a coil along the corner of the upper surface and lower surface of a core, gaps are generated between the upper surface, lower surface, outer periphery and core of the core, and every product The reactor has a variation in external dimensions (height and outside diameter).
Here, when the reactor having a small external dimension is fixed by the mounting structure of Patent Document 1, the spring force of a plate spring pressing the reactor becomes weak, and there is a possibility that the reactor may be detached from the housing by vibration input.
In addition, when the reactor having a large external dimension is fixed by the mounting structure of Patent Document 1, the spring force of the plate spring becomes excessively large, which may damage the plate spring and the reactor.
Therefore, the present invention has been made to solve these problems, and improves the vibration resistance even if a winding component such as a reactor having a different external dimension for each product is mounted on a hybrid car, an electric car or the like. It is an object of the present invention to provide a mounting structure of winding parts that can be securely fixed to a housing and a power conversion device provided with the mounting structure.

In order to achieve the above object, according to one aspect of the present invention, there is provided a winding component mounting structure including: a winding component formed by winding a coil a plurality of times along inner and outer peripheral surfaces of a ring-shaped core; A mounting member made of an insulating material disposed in contact with the fixing surface of the housing in a state where the lower surface of the winding component is mounted, and a mounting member of the winding component A pressing member made of an insulating material disposed in contact with the upper surface, the mounting member, the pressing member, and the housing are connected, and from the pressing member toward the fixing surface with respect to the winding component and the mounting member A pressing force application unit for applying a pressing force, wherein the pressing force application unit follows the change in height of the winding component and the distance between the mounting member and the pressing member is variable, and A part of the lower surface of the wire part is placed on the mounting member, and the remaining part of the lower surface of the winding part Between the fixed surface, is fixed pressing the winding part on the fixed side in a state of sandwiching the cushioning material for absorbing the vibrations have been transmitted to the housing.
Moreover, the power converter device which concerns on this invention is equipped with the attachment structure of said winding components.

  According to the mounting structure of the winding parts according to the present invention and the power conversion device provided with this mounting structure, even if the winding parts such as a reactor having different external dimensions for each product are mounted on a hybrid car, an electric car, etc. Vibration resistance characteristics can be improved and fixed to the housing with certainty.

It is a figure showing winding parts, such as a reactor concerning the present invention. It is a top view which shows the attachment structure of the winding components of 1st Embodiment which concerns on this invention. It is an III-III arrow line view of FIG. It is an IV-IV arrow line view of FIG. It is a figure which shows the state which attached the winding components from which height differs in the attachment structure of the winding components of 1st Embodiment.

Next, a first embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between the thickness and the planar dimension, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Moreover, it is a matter of course that parts having different dimensional relationships and ratios among the drawings are included.
In addition, the first embodiment described below exemplifies an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention includes materials, shapes, and structures of component parts. , Arrangement, etc. are not specified to the following. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

[Shape of reactor as winding parts]
Fig.1 (a), (b) shows the reactor 1 as a winding component which concerns on this invention. The reactor 1 is a component including a ring-shaped core 2 and a coil 3 wound a plurality of times along an inner circumferential surface and an outer circumferential surface of the core 2 alternately.
When manufacturing this reactor 1, as shown in FIG. 1 (b), when bending the coil 3 along the corners on the inner diameter side and the outer surface side of the upper surface 2a and the lower surface 2b of the core 2, bending R portions 4 to 7 As a result, gaps 8 to 11 are generated between the upper surface, the inner periphery, the lower surface and the outer periphery of the core 2 and the coil. For this reason, the manufactured reactor 1 has a variation in outer dimensions (height dimension H and outer diameter dimension D) for each product.
The reactor 1 is mounted inside a housing as a power conversion control unit of an AC / DC converter for a hybrid vehicle or an electric vehicle.

[Mounting Structure of Winding Parts of First Embodiment]
FIGS. 2 to 5 show the attachment structure of the winding parts according to the first embodiment of the present invention. 2 is a plan view showing the attachment structure of the winding parts of the first embodiment, FIG. 3 is a view taken along the line III-III in FIG. 2, and FIG. 4 is a view taken along the line IV-IV in FIG. FIG.
The attachment structure of the winding parts according to the first embodiment is, as shown in FIG. 2, an attachment structure of two reactors 1A and 1B which are arranged and fixed to the parts fixing surface 12a of the AC / DC converter housing 12 From the mounting member 13 on which a part of the lower surface of the two reactors 1A and 1B is mounted, the pressing member 14 disposed in contact with the top surfaces of the two reactors 1A and 1B, and the pressing member 14 Two pressing force application units 15a and 15b for applying pressing force downward to the component fixing surface 12a to the two reactors 1A and 1B, and sandwiched between the component fixing surface 12a and the lower surface of the reactors 1A and 1B And the heat transfer buffer members 30 and 31.

The housing 12 has a rectangular component fixing surface 12a as shown in FIG. As shown in FIG. 4, a cylindrical shape is provided between the mounting positions of the two reactors 1A and 1B arranged and fixed to the component fixing surface 12a at two positions separated from each other in the width direction. The protrusion 32 is formed. A female screw 33 is formed in the inside from the upper end of the projection 32.
The mounting member 13 is formed of an insulating member such as a synthetic resin, and as shown in FIGS. 3 and 4, the lower openings of the hollow portions 1a and 1b of the two reactors 1A and 1B arranged side by side are closed. A receiving portion 16 extending to a position and receiving a part of the lower surface of reactors 1A and 1B, and a mounting member side connecting portion 17 extending in a cross shape (see FIG. 2) with respect to receiving portion 16 And two positioning portions 18 and 19 which project from the upper surface of the receiving portion 16 and are respectively inserted into the lower openings of the hollow portions 1a and 1b of the two reactors 1A and 1B, and two upper surface central portions of the receiving portion 16 The wall portion 20 rising from between the positions where the reactors 1A and 1B are disposed, and the connecting post 21 protruding from the upper portion of the wall portion 20.

The mounting member side connection part 17 is integrally formed in the upper part of the cylindrical outer fitting part 17a which the projection part 32 of the housing | casing 12 fits in, and this outer fitting part 17a, as shown in FIG. And a cylindrical mounting member side loose fitting portion 17b.
The mounting member side loose fitting portion 17b is formed with a screw passage hole 17c through which the male screw portion 34a of the connecting screw 34 passes.
The pressing member 14 is formed of an insulating material such as a synthetic resin, and as shown in FIGS. 3 and 4, the pressing portion 23 evenly abutted on the upper surfaces of the two reactors 1A and 1B, and the pressing portion An engaging recess 26 which protrudes from the lower surface of the longitudinal central portion 23 and into which the connecting pillar 21 of the mounting member 13 fits in a state of providing a clearance, and an opening on the upper surface of the pressing portion 23 for mounting the mounting member 13 A tubular pressing member side connecting portion 27 formed at a position corresponding to the member side connecting portion 17 is provided.

As shown in FIG. 4, the pressing member side connecting portion 27 is a screw through which the cylindrical pressing member side loose fitting portion 27a and the male screw portion 34a of the connecting screw 34 pass and the screw head 34b engages at the opening peripheral edge. And a passage hole 27b.
The pressing member side loose fitting portion 27 a is fitted on the outer periphery of the placing member side loose fitting portion 17 b of the placing member side connecting portion 17. Here, the pressing member side loose fitting portion 27a and the placing member side loose fitting portion 17b allow the distance between the placing member 13 and the pressing member 14 to be variable while allowing the eccentricity of the axial center of each other. It is fitted in the state which has a play.

The heat transfer buffer members 30 and 31 are insulating materials made of silicon or the like having good thermal conductivity and elasticity, and as shown in FIGS. 2 and 3, the periphery of the receiving portion 16 of the mounting member 13 is It arrange | positions on the components fixed surface 12a, encircling.
The pressing force applying portion according to the present invention corresponds to the pressing force applying portions 15a and 15b, and the pressing force applying portions 15a and 15b are female screw portions 33 formed on the projecting portion 32 of the housing 12, and the pressing member 14 A screw passage hole 27b formed in the screw hole, a screw passage hole 17c formed in the mounting member side loose fitting portion 17b of the mounting member 13, and a screw passage hole 27b formed in the pressing member side connection portion 27 of the pressing member 14; And a connecting screw 34.
Further, the pair of loosely fitting portions according to the present invention corresponds to the placing member side loosely fitting portion 17b of the placing member 13 and the pressing member side loosely fitting portion 27a of the pressing member 14 and fixes the casing according to the present invention The surface corresponds to the component fixing surface 12a.

[Procedure of Mounting Structure of Winding Parts of First Embodiment]
Next, a procedure for fixing the two reactors 1A and 1B to the component fixing surface 12a will be described.
First, the mounting member 13 is disposed on the component fixing surface 12 a in a state where the outer fitting portion 17 a is fitted to the outer periphery of the protrusion 32 of the housing 12.
In addition, the heat transfer buffer members 30 and 31 are disposed on the component fixing surface 12 a while surrounding the periphery of the receiving portion 16 of the mounting member 13.
Next, the positioning portion 18 of the mounting member 13 is inserted into the lower opening of the hollow portion 1a of one reactor 1A, and on the heat transfer buffer member 30 disposed on the positioning portion 18 side of the mounting member 13. Load a part of the lower surface of the reactor 1A. Moreover, while inserting the positioning part 19 of the mounting member 13 in the lower opening part of the hollow part 1b of the other reactor 1B, on the heat-transfer buffer member 31 arrange | positioned at the positioning part 19 side of the mounting member 13 Load a part of the lower surface of the reactor 1B.

Next, with the positioning portions 24 and 25 inserted in the upper openings of the hollow portions 1a and 1b of the two reactors 1A and 1B disposed on the mounting member 13, the pressing member 14 is the upper surface of the reactors 1A and 1B. Place on
Next, the two connecting screws 34 constituting the pressing force applying portions 15 a and 15 b are inserted downward through the opening hole communicating with the cylindrical pressing member side connecting portion 27 of the pressing member 14.
Then, the male screw portion 34a of the two connecting screws 34 is passed through the screw passage hole 17c of the mounting member side loose fitting portion 17b of the placing member 13, and the pressing member side loose fitting portion 27a of the pressing member 14 is placed The male screw portion 34 a is screwed into the female screw portion 33 of the projection 32 positioned in the outer fitting portion 17 a of the mounting member 13 in a state of being fitted into the member side loose fitting portion 17 b.
Then, while the screw heads 34b of the two connection screws 34 are engaged with the periphery of the screw passage hole 27b of the pressing member side connection portion 27, the screwed state of the male screw portion 34a and the female screw portion 22a of the mounting member 13 To set the distance between the mounting member 13 and the pressing member 14 to a predetermined value.

Thus, the two reactors 1A and 1B are fixed to the component fixing surface 12a in a state where the two reactors 1A and 1B are pressed toward the housing 12 by the pressing member 14.
Here, as shown in FIG. 5, when the height H1 of one of the reactors 1A is higher than the height H2 of the other reactor 1B (H1> H2), the pressing portion that contacts the upper surface of the reactors 1A and 1B Since 23 is inclined, the axial center P1 of the pressing member side connecting portion 27 and the axial center P2 of the mounting member side connecting portion 17 are in an eccentric state.
The pressing member side loose fitting portion 27a of the pressing member 14 and the placing member side loose fitting portion 17b of the placing member 13 have a distance between the placing member 13 and the pressing member 14 while allowing eccentricity of each other's axial center In the state of having play so as to be variable, no local stress is generated at any portion of the mounting member 13 and the pressing member 14.

[Effects of Mounting Structure of Winding Parts of First Embodiment]
Next, the effect of the attachment structure of the winding parts of the first embodiment will be described.
The mounting structure of the winding parts of the first embodiment follows the height change of the reactors 1A and 1B to cope with the change in height of the reactors 1A and 1B even if the reactors 1A and 1B are prone to variations in external dimensions for each product. Since the distance between the pressing members 14 is variable, it can be securely fixed to the housing 12.
That is, when the height dimensions of the two reactors 1A and 1B are high, the pressing force application portions 15a and 15b increase the distance between the mounting member 13 and the pressing member 14, and the height dimensions of the reactors 1A and 1B. When the value of V is low, the pressing force application units 15a and 15b reduce the distance between the mounting member 13 and the pressing member 14 to fix the reactors 1A and 1B to the housing 12 with an optimal pressing force.

When the heights of the reactors 1A and 1B are different, the pressing portion 23 in contact with the upper surfaces of the reactors 1A and 1B is inclined, but the pressing member side loose fitting portion 27a of the pressing member 14 and the mounting member 13 Since the mounting member side loose fitting portion 17b is fitted with a play so that the distance between the mounting member 13 and the pressing member 14 can be varied while allowing the eccentricity of each other's axial center, the reactor 1A and 1B can be fixed to the housing 12 with an optimum pressing force.
Therefore, the mounting structure of the winding parts of the first embodiment has vibration resistance characteristics of the two reactors 1A and 1B used as a power conversion control unit of a power conversion device mounted on a hybrid vehicle or an electric vehicle. It can be improved and fixed to the housing 12 with certainty.
When the heights of the reactors 1A and 1B are different, the pressing member side loose fitting portion 27a and the placing member side loose fitting portion 17b are fitted in a state having play, so the placing member 13 and the pressing The local stress does not occur in any part of the member 14, and the reactors 1A and 1B can be fixed to the housing 12 for a long time.

In addition, since the heat transfer buffer members 30 and 31 are sandwiched in a compressed state between the lower surfaces of the reactors 1A and 1B not mounted on the receiving portion 16 of the mounting member 13 and the component fixing surface 12a. The vibration transmitted to the housing 12 is easily absorbed by the heat transfer buffer members 30 and 31, and the vibration resistance can be further improved.
In addition, since the mounting member 13 made of an insulating material and the heat transfer buffer members 30 and 31 are disposed between the housing 12 and the coil 3 of the reactors 1A and 1B, between the housing 12 and the coil 3 A sufficient insulation distance can be secured.

Further, the positioning of the reactors 1A and 1B with respect to the mounting member 13 and the pressing member 14 is completed only by inserting the positioning portions 18 and 19 of the mounting member 13 into the hollow portions 1a and 1b of the two reactors 1A and 1B. Therefore, the installation work of reactors 1A and 1B can be easily performed.
Furthermore, the pressing force application units 15a and 15b can change the distance between the pressing member 14 and the placement member 13 by adjusting the screwing length of the male screw portion 34a of the connection screw 34 and the female screw portion 33 of the housing 12. Therefore, the mounting structure of the reactor can be simplified.

Furthermore, the two connecting screws 34 locked to the pressing member 14 B are directly screwed into the female screw portion 33 formed in the projection 32 of the housing 12, so that the space between the pressing member 14 and the placement member 13 is Thus, the reactors 1A and 1B can be firmly fixed.
In addition, although the attachment structure of the winding components of 1st Embodiment demonstrated the case where two reactors 1A and 1B were fixed to the component fixing surface 12a, when fixing three or more reactors to the component fixing surface 12a The same effect can be achieved.

1A, 1B Reactor 1a, 1b Hollow part 2 Core 2a Upper surface 2b Lower surface 3 Coil 12 Case 12a Component fixing surface 13 Mounting member 14 Pressing member 15a, 15b Pressing force receiving portion 16 Receiving portion 17 Mounting member side connection portion 17a outside Fitting portion 17b Mounting member side loose fitting portion 17c Screw passing holes 18, 19 Positioning portion 20 Wall portion 21 Connecting post 23 Pressing portion 26 Engaging recess 27 Pressing member side connecting portion 27a Pressing member side loose fitting portion 27b Screw passing hole 30 , 31 Heat transfer buffer member 32 Protrusion 33 Female thread 34 Connection screw 34a Male thread 34b Screw head

Claims (7)

A winding component mounting structure for fixing a winding component comprising a plurality of turns of a coil along an inner circumferential surface and an outer circumferential surface of a ring-shaped core to a casing,
A mounting member made of an insulating material disposed in contact with the fixing surface of the housing in a state in which the lower surface of the winding component is mounted;
A pressing member made of an insulating material disposed in contact with the upper surface of the winding part;
A pressing force application unit that connects the placing member, the pressing member, and the housing, and applies pressing force from the pressing member to the winding component and the placing member toward the fixing surface; Equipped
The pressing force applying portion follows the change in height of the winding component to make the distance between the placing member and the pressing member variable.
A part of the lower surface of the winding part is placed on the placing member, and is transmitted to the housing between the remaining part of the lower surface of the winding part and the fixing surface. A mounting structure of a winding component characterized in that the winding component is pressed and fixed to the fixed surface side in a state in which a shock absorbing material that absorbs vibration is sandwiched. The pressing force application unit
A female screw formed in the housing;
A pressing member side screw passage hole formed through the upper and lower surfaces of the pressing member;
A mounting member side screw passage hole formed through the upper and lower surfaces of the mounting member;
And a connecting screw,
A state in which the male screw portion of the connection screw passes through the pressing member side screw passage hole and the placing member side screw passage hole, and the screw head of the connection screw is engaged with the opening periphery of the pressing member side screw passage hole The male screw portion is screwed into the female screw portion of the housing, and the screwing position of the male screw portion with respect to the female screw portion is changed to change the distance between the placing member and the pressing member. The attachment structure of the winding parts according to claim 1 characterized by making it do. The pressing force application unit is provided with a pair of loose fitting portions fitted to each other on both the pressing member and the placing member,
The pair of loosely fitting portions allow the eccentricity of the axial center of the pressing member side screw passage hole and the axial center of the placing member side screw passage hole, while the distance between the placing member and the pressing member is 3. The mounting structure of a winding component according to claim 2, wherein the winding component is fitted with play so as to be variable. At least two or more of the winding parts are arranged in a row in the mounting member;
The pressing force application parts are provided at two positions separated in a direction orthogonal to the direction in which the winding parts are disposed between two adjacent winding parts. The attachment structure of the winding parts according to any one of claims 1 to 3.   The winding according to any one of claims 1 to 4, wherein the placing member includes a positioning portion that protrudes upward and is inserted into the hollow portion of the winding component from the lower opening. Mounting structure of wire parts.   The mounting structure of a winding component according to any one of claims 1 to 5, wherein the shock absorbing material is a member having a good heat conductivity.   A power converter comprising the mounting structure for a winding component according to any one of claims 1 to 6.

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