Power conversion device

Abstract

The present application provides a kind of power conversion device capable of inhibiting gasket buckling.The power conversion device includes frame body (10), connector (20) with insertion part (22) and gasket (30) arranged between insertion part and opening part (13), frame body has inner wall surface (13b) in contact with gasket (30) and frame body side guide surface (13c) arranged at the inner side of frame body than inner wall surface, frame body side guide surface is located at the inner circumferential side of opening part than inner wall surface (13b), insertion part has: outer circumferential surface (22b) in contact with gasket;And insertion part side guide surface (22e4) arranged at the inner side of frame body (10) than outer circumferential surface, when the distance between front surface (11a) and frame body side guide surface (13c) is set as L1, the distance between gasket (30) and the front end (22f) of insertion part side guide surface (22e4) is set as L2, distance L2 is longer than distance L1.

Description

Technical Field

[0001] This disclosure relates to an electric power conversion device including a washer. Background Technology

[0002] Patent Document 1 describes a waterproof structure for a light-emitting diode (LED) unit. This waterproof structure comprises an LED chip, a housing, a retainer, and a gasket. The LED chip is housed within the housing. The housing has an opening for mounting the retainer. The retainer is mounted in the opening of the housing. A gasket is mounted on the outer periphery of the retainer. The inner wall of the housing and the outer periphery of the retainer are sealed by the gasket. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2012-186075 Summary of the Invention

[0004] In the assembly process of the aforementioned waterproof structure, the retainer is sometimes inserted off-center relative to the opening of the housing. In this case, when the retainer is inserted into the opening, the gasket interferes with the housing, posing a technical problem that the gasket may curl up.

[0005] This disclosure is made to solve the above-mentioned technical problems, and its purpose is to provide a power conversion device that can suppress gasket warping.

[0006] The power conversion device disclosed herein includes: a frame having a front side with an opening and housing electrical components therein; an insertion member having an insertion portion that inserts into the opening from the front side; and a gasket disposed between the insertion portion and the opening. The frame has: an inner wall surface that contacts the gasket; and a frame-side guide surface disposed on an inner side of the frame closer to the inner wall surface than the inner wall surface in the insertion direction of the insertion portion, the frame-side guide surface being located on an inner peripheral side of the opening closer to the inner wall surface than the inner wall surface. The insertion portion has: an outer peripheral surface that contacts the washer; and at least one insertion component side guide surface, the insertion component side guide surface being disposed on the inner side of the frame body closer to the outer peripheral surface than the outer peripheral surface in the insertion direction, the at least one insertion component side guide surface being opposite to the frame body side guide surface, and when the distance along the insertion direction between the front surface and the frame body side guide surface is set as L1, and the distance along the insertion direction between the washer and the front end of the at least one insertion component side guide surface in the insertion direction is set as L2, the distance L2 is longer than the distance L1.

[0007] According to this disclosure, it is possible to suppress gasket warping. Attached Figure Description

[0008] Figure 1 This is a perspective view showing the appearance of the power conversion device according to Embodiment 1. Figure 2 This is a top view showing the appearance of the power conversion device according to Embodiment 1. Figure 3 This is a perspective view showing the structure of the connector and gasket of the power conversion device according to Embodiment 1. Figure 4 This is a perspective view showing the structure of the main body of the power conversion device of Embodiment 1 as viewed from the inside. Figure 5 This is a perspective view showing the structure of the opening formed in the main body of the power conversion device in Embodiment 1 as viewed from the outside. Figure 6 It means Figure 2 A sectional view of section VI-VI. Figure 7 It is an enlarged representation Figure 6 The illustration for Part VII. Figure 8 This is a cross-sectional view showing the process of inserting the connector insertion part into the opening in the manufacturing process of the power conversion device of Embodiment 1. Detailed Implementation

[0009] Implementation Method 1 The power conversion device of Embodiment 1 will be described. The power conversion device includes a power converter such as an inverter. The power conversion device is a device that converts electricity supplied from a power source into alternating current (AC) at a predetermined voltage and supplies the AC power to a load. The load is, for example, a motor.

[0010] Figure 1 This is a perspective view showing the appearance of the power conversion device according to this embodiment. Figure 2 This is a top view showing the appearance of the power conversion device according to this embodiment. Figure 3 This is a perspective view showing the structure of the connector and gasket of the power conversion device according to this embodiment. Figure 4 This is a perspective view showing the structure of the main body of the power conversion device of this embodiment as viewed from the inside. Figure 5 This is a perspective view showing the structure of the opening formed in the main body of the power conversion device of this embodiment, viewed from the outside. Figure 6 It means Figure 2 A sectional view of section VI-VI. Figure 7 It is an enlarged representation Figure 6 The illustration for Part VII.

[0011] exist Figure 3 as well as Figure 4In the diagram, the direction from bottom to top indicates the direction in which the insertion part 22 of the connector 20 is inserted into the opening 13, i.e., the insertion direction. Figure 3 as well as Figure 4 The area below indicates the outer side of the frame 10 in the insertion direction. Figure 3 as well as Figure 4 The upper part indicates the inner side of the frame 10 in the insertion direction. Figures 5-7 In the diagram, the direction from top to bottom indicates the insertion direction. Figures 5-7 The upper part indicates the outer side of the frame 10 in the insertion direction. Figures 5-7 The area below indicates the inner side of the frame 10 in the insertion direction.

[0012] like Figures 1 to 7 As shown, the power conversion device has a frame 10, a connector 20, and a gasket 30. Electrical components 51 and a control board 50 are housed inside the frame 10. The electrical components 51 constitute the power converter. The electrical components 51 are mounted on the control board 50.

[0013] The frame 10 is a rectangular box shape. The frame 10 has a main body 11 and a cover 12. One side of the main body 11, i.e. Figure 1 The lower surface of the frame body 11 is open. The opening of the frame body 11 is sealed by the cover 12.

[0014] The frame body 11 has a front side 11a and a back side 11b. The front side 11a is planar. An opening 13 is formed in a portion of the front side 11a. The opening 13 extends from the front side 11a through the frame body 11 to the back side 11b. In this embodiment, the opening 13 has an elongated oval shape. However, the shape of the opening 13 is not limited to an elongated oval. The central axis 13a of the opening 13 is perpendicular to the front side 11a. Furthermore, the central axis 13a is parallel to the insertion direction.

[0015] The back face 11b is formed on the back side of the front face 11a. The back face 11b faces the interior space of the frame 10. A plurality of frame-side guide portions 14a1, 14a2, 14a3, and 14a4 are formed on the back face 11b. The frame-side guide portions 14a1, 14a2, 14a3, and 14a4 protrude from the back face 11b toward the interior side of the frame 10. The frame-side guide portions 14a1, 14a2, 14a3, and 14a4 are formed around the opening 13.

[0016] When viewed along the insertion direction, the frame-side guide portions 14a1, 14a2, 14a3, and 14a4 are arranged at 90° intervals with the central axis 13a as the center. Second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4, described later, are formed on the frame-side guide portions 14a1, 14a2, 14a3, and 14a4, respectively.

[0017] The frame body 11 has an inner wall surface 13b, a first frame side guide surface 13c, a frame side layer difference surface 13d, and a plurality of second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4. The inner wall surface 13b, the first frame side guide surface 13c, the frame side layer difference surface 13d, and the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are respectively formed on the inner side of the opening 13 and face the opening 13.

[0018] The inner wall surface 13b contacts the washer 30. The inner wall surface 13b is positioned adjacent to the front surface 11a. The inner wall surface 13b is formed parallel to the central axis 13a, i.e. perpendicular to the front surface 11a. The inner wall surface 13b is formed over the entire circumference of the opening 13.

[0019] The first frame-side guide surface 13c is located on the inner side of the frame 10, closer to the inner wall surface 13b in the insertion direction. The first frame-side guide surface 13c is adjacent to the back surface 11b. The first frame-side guide surface 13c is formed parallel to the central axis 13a, that is, perpendicular to the front surface 11a. The first frame-side guide surface 13c is located on the inner circumference of the opening 13, closer to the central axis 13a than the inner wall surface 13b. The first frame-side guide surface 13c is formed throughout the entire circumference of the opening 13.

[0020] A frame side layering surface 13d is formed between the inner wall surface 13b and the first frame side guide surface 13c. That is, the frame side layering surface 13d is located on the inner side of the frame 10, closer to the washer 30, and on the outer side of the frame 10, closer to the first frame side guide surface 13c, in the insertion direction. The frame side layering surface 13d faces the outer side of the frame 10, i.e., the washer 30 side, in the insertion direction. The frame side layering surface 13d is formed throughout the entire circumference of the opening 13. The frame side layering surface 13d can also be formed parallel to the front surface 11a.

[0021] Second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are respectively disposed on the inner side of the frame 10, which is closer to the first frame side guide surface 13c in the insertion direction. Second frame side guide surface 13e1 is formed in frame side guide portion 14a1. Second frame side guide surface 13e2 is formed in frame side guide portion 14a2. Second frame side guide surface 13e3 is formed in frame side guide portion 14a3. Second frame side guide surface 13e4 is formed in frame side guide portion 14a4.

[0022] The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are connected to the first frame side guide surface 13c and extend from the first frame side guide surface 13c along the insertion direction. The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are formed parallel to the central axis 13a, i.e., perpendicular to the front surface 11a. The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are formed on the same surface as the first frame side guide surface 13c.

[0023] The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4, together with the first frame side guide surface 13c, function as frame side guide surfaces to guide the insertion part 22. Hereinafter, the first frame side guide surface 13c and the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are sometimes collectively referred to as "frame side guide surfaces".

[0024] The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are mutually divided in the circumferential direction of the opening 13. The second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are arranged at intervals around the periphery of the opening 13. When viewed along the insertion direction, the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 are arranged at 90° intervals around the central axis 13a. A gap 14b is formed between two adjacent second frame side guide surfaces. When viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap 14b.

[0025] When viewed along the insertion direction, the positions of the second frame side guide surface 13e1 and the second frame side guide surface 13e3 are 180° apart with respect to the central axis 13a. Similarly, when viewed along the insertion direction, the positions of the second frame side guide surface 13e2 and the second frame side guide surface 13e4 are 180° apart with respect to the central axis 13a.

[0026] Connector 20 is an insertion component mounted on housing 10. Connector 20 has a connector body 21 and an insertion portion 22. Connector body 21 protrudes from housing 10. Connector body 21 has a socket 23 for insertion of a target-side connector (not shown). Connector body 21 is fastened to housing 10 by screws 40.

[0027] The connector body 21 is formed in a flange shape relative to the insertion portion 22. The connector body 21 has a planar flange surface 21a formed around the insertion portion 22. The flange surface 21a is formed perpendicular to the central axis 22a of the insertion portion 22. The flange surface 21a faces the inner side of the housing 10 in the insertion direction. The flange surface 21a faces the front surface 11a of the housing 10. The flange surface 21a contacts the front surface 11a.

[0028] The insertion portion 22 is inserted into the opening portion 13 from the front side 11a. The insertion portion 22 protrudes from the connector body portion 21 and extends along the insertion direction. The insertion portion 22 has the same cross-sectional shape as the opening shape of the opening portion 13. The central axis 22a of the insertion portion 22 is perpendicular to the flange surface 21a. The central axis 22a of the insertion portion 22 coincides with the central axis 13a of the opening portion 13. Therefore, the flange surface 21a is parallel to the front side 11a. Both the central axis 22a and the central axis 13a are parallel to the insertion direction.

[0029] Multiple terminals 24 and multiple connector-side guides 25a1, 25a2, 25a3, and 25a4 are formed at the end of the insertion portion 22 in the insertion direction. The terminals 24 are electrically connected to the control board 50 inside the frame 10 via connecting members such as solder. Thus, signal input from the outside to the power conversion device and signal output from the power conversion device to the outside can be realized via the connector 20.

[0030] Connector-side guide portions 25a1, 25a2, 25a3, and 25a4 are formed along the outer periphery of the insertion portion 22. The connector-side guide portions 25a1, 25a2, 25a3, and 25a4 protrude from the end of the insertion portion 22 in the insertion direction toward the inner side of the frame 10.

[0031] When viewed along the insertion direction, the connector-side guide portions 25a1, 25a2, 25a3, and 25a4 are arranged at 90° intervals with the central axis 22a as the center. Connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4, which will be described later, are formed on the connector-side guide portions 25a1, 25a2, 25a3, and 25a4, respectively.

[0032] The insertion portion 22 has a first outer peripheral surface 22b, a second outer peripheral surface 22c, a connector-side interlayer surface 22d, and a plurality of connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4. The first outer peripheral surface 22b, the second outer peripheral surface 22c, the connector-side interlayer surface 22d, and the plurality of connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are respectively formed on the outer peripheral side of the insertion portion 22.

[0033] The first outer peripheral surface 22b contacts the washer 30. The first outer peripheral surface 22b faces the inner wall surface 13b of the frame body 11 in a manner that clamps the washer 30. In addition, the first outer peripheral surface 22b faces the first frame side guide surface 13c of the frame body 11. A gap is formed between the first outer peripheral surface 22b and the first frame side guide surface 13c. This gap is set to prevent difficulty in inserting the insertion part 22 into the opening 13, taking into account the component dimensional tolerances of the frame body 11 and the connector 20. The first outer peripheral surface 22b is formed parallel to the central axis 22a, that is, perpendicular to the flange surface 21a. The first outer peripheral surface 22b is formed over the entire circumference of the insertion part 22.

[0034] The second outer peripheral surface 22c is formed between the first outer peripheral surface 22b and the flange surface 21a in the insertion direction. The second outer peripheral surface 22c is positioned adjacent to the flange surface 21a. The second outer peripheral surface 22c is located on the outer peripheral side of the insertion portion 22, closer to the first outer peripheral surface 22b. The second outer peripheral surface 22c is positioned opposite the inner wall surface 13b of the frame body 11 with a gap. The second outer peripheral surface 22c may also contact the inner wall surface 13b. The second outer peripheral surface 22c is formed over the entire circumference of the insertion portion 22.

[0035] The connector side-layer surface 22d is located on the outer side of the frame 10, closer to the washer 30 in the insertion direction. The connector side-layer surface 22d is formed between the first outer peripheral surface 22b and the second outer peripheral surface 22c. The connector side-layer surface 22d faces the inner side of the frame 10, i.e., the washer 30 side, in the insertion direction. The connector side-layer surface 22d is formed over the entire circumference of the insertion portion 22. The washer 30 contacts the connector side-layer surface 22d. The connector side-layer surface 22d is opposite to the frame side-layer surface 13d in a manner that clamps the washer 30. The connector side-layer surface 22d is formed parallel to the flange surface 21a.

[0036] The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are respectively located on the inner side of the frame 10, which is closer to the first outer peripheral surface 22b in the insertion direction. That is, the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are respectively located on the inner side of the frame 10, which is closer to the first outer peripheral surface 22b in the insertion direction.

[0037] A connector-side guide surface 22e1 is formed on a connector-side guide portion 25a1. A connector-side guide surface 22e2 is formed on a connector-side guide portion 25a2. A connector-side guide surface 22e3 is formed on a connector-side guide portion 25a3. A connector-side guide surface 22e4 is formed on a connector-side guide portion 25a4.

[0038] Connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are connected to the first outer peripheral surface 22b and extend from the first outer peripheral surface 22b along the insertion direction. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are respectively formed parallel to the central axis 22a, i.e., perpendicular to the flange surface 21a. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are formed on the same surface as the first outer peripheral surface 22b.

[0039] The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are mutually divided in the circumferential direction of the insertion portion 22. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are arranged at intervals around the periphery of the insertion portion 22. When viewed along the insertion direction, the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are arranged with the central axis 22a as the center and at 90° intervals. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are respectively provided at positions corresponding to the second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4. For example, the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4, as well as the second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4, are only formed at positions required for the self-alignment of the insertion portion 22 and the opening portion 13.

[0040] A gap 25b is formed between two adjacent connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4. When viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap 25b.

[0041] When viewed along the insertion direction, the positions of the connector-side guide surfaces 22e1 and 22e3 are 180° apart with respect to the central axis 22a. Similarly, when viewed along the insertion direction, the positions of the connector-side guide surfaces 22e2 and 22e4 are 180° apart with respect to the central axis 22a.

[0042] The connector-side guide surface 22e1 faces the second frame-side guide surface 13e1. A gap is formed between the connector-side guide surface 22e1 and the second frame-side guide surface 13e1. The connector-side guide surface 22e2 faces the second frame-side guide surface 13e2. A gap is formed between the connector-side guide surface 22e2 and the second frame-side guide surface 13e2. The connector-side guide surface 22e3 faces the second frame-side guide surface 13e3. A gap is formed between the connector-side guide surface 22e3 and the second frame-side guide surface 13e3. The connector-side guide surface 22e4 faces the second frame-side guide surface 13e4. A gap is formed between the connector-side guide surface 22e4 and the second frame-side guide surface 13e4. These gaps are designed to prevent difficulty in inserting the insertion part 22 into the opening part 13, taking into account the dimensional tolerances of the frame body 11 and the connector 20. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 can also be opposite to the first frame-side guide surface 13c. In the above case, a gap is also formed between each of the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 and the first frame-side guide surface 13c.

[0043] The washer 30 is formed in a ring shape. The washer 30 is disposed between the insertion portion 22 and the opening portion 13. The washer 30 is installed on the first outer peripheral surface 22b of the insertion portion 22. The washer 30 covers the entire circumference and is in close contact with both the first outer peripheral surface 22b and the inner wall surface 13b of the frame body 11. Because the first outer peripheral surface 22b and the inner wall surface 13b are sealed by the washer 30, a waterproof structure is formed to prevent water from intruding into the interior of the frame 10.

[0044] Furthermore, the washer 30 contacts the connector side interlayer surface 22d all the way around the circumference. Thus, the washer 30 is positioned in the insertion direction.

[0045] Here, the distance along the insertion direction between the front surface 11a and the first frame side guide surface 13c is set as L1. The distance along the insertion direction between the washer 30 and the front end surfaces 22f of the connector side guide surfaces 22e1, 22e2, 22e3, and 22e4 in the insertion direction is set as L2. At this time, the distance L2 is longer than the distance L1 (L2 > L1).

[0046] Figure 8 This is a cross-sectional view showing the process of inserting the connector's insertion portion into the opening during the manufacturing process of the power conversion device according to this embodiment. Figure 8 In the diagram, the direction from top to bottom indicates the direction in which the insertion part 22 is inserted into the opening part 13, i.e., the insertion direction. Figure 8 The upper part indicates the outer side of the frame 10 in the insertion direction. Figure 8 The area below indicates the inner side of the frame 10 in the insertion direction.

[0047] The washer 30 is installed on the first outer peripheral surface 22b of the insertion portion 22 before the insertion portion 22 is inserted into the opening portion 13. The washer 30 contacts the connector side interlayer surface 22d all around the circumference.

[0048] like Figure 8 As shown, in the process of inserting the insertion portion 22 of the connector 20 into the opening 13, firstly, the front ends 22f of each of the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are inserted to a position closer to the inner circumference than the first frame-side guide surface 13c. This substantially aligns the insertion portion 22 with the opening 13, and the central axis 22a of the insertion portion 22 is substantially aligned with the central axis 13a of the opening 13. However, as described above, a gap, taking into account component dimensional tolerances, is provided between each of the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 and the frame-side guide surface. Therefore, at this point in time, an offset equivalent to the aforementioned gap is allowed between the central axis 22a and the central axis 13a. At this point in time, the washer 30 has not yet been inserted into the opening 13.

[0049] If the insertion part 22 continues to be inserted along the insertion direction, the washer 30 is inserted into the opening 13. The washer 30 is inserted into the opening 13 together with the insertion part 22, with the central axis 22a and the central axis 13a approximately aligned. When the washer 30 is inserted into the opening 13, under the action of the reaction force of the washer 30, the central axis 22a and the central axis 13a are aligned.

[0050] Subsequently, the insertion part 22 is inserted into the opening 13 until the flange surface 21a contacts the front surface 11a. Thus, the insertion part 22 is inserted into the opening 13 with its central axis 22a aligned with the central axis 13a. The washer 30 inserted into the opening 13 is in close contact with both the first outer peripheral surface 22b of the insertion part 22 and the inner wall surface 13b of the frame body 11. The position of the washer 30 along the direction of the central axis 22a and the central axis 13a is determined by the connector side-layer surface 22d.

[0051] In the power conversion device of this embodiment, the distance L2 is longer than the distance L1. Therefore, as Figure 8 As shown, before the washer 30 is inserted into the opening 13, that is, before the washer 30 contacts the front surface 11a of the frame body 11, the insertion portion 22 and the opening 13 are approximately aligned. Therefore, the washer 30 is inserted into the opening 13 with the insertion portion 22 and the opening 13 approximately aligned. Therefore, according to this embodiment, it is possible to prevent the washer 30 from contacting the front surface 11a when the insertion portion 22 and the opening 13 are misaligned. As a result, it is possible to suppress the washer 30 from curling.

[0052] Here, as a guide structure for aligning the insertion part and the opening, a structure with a pin on one side of the connector and a pin hole on the side of the frame body is conceivable. However, in the above case, in order to align the insertion part and the opening before the washer is inserted into the opening, the length of the pin needs to be increased and the depth of the pin hole needs to be increased. Therefore, the configuration of the electrical components inside the frame becomes complicated, and the height dimension of the power conversion device along the insertion direction of the insertion part increases.

[0053] In contrast, in this embodiment, as Figure 6 As shown, when viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap portion 25b. That is, when viewed along the insertion direction, the electrical component 51 is configured not to overlap with each of the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4. Therefore, it is possible to suppress the increase in the length of each of the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 along the insertion direction, and it is also possible to suppress the increase in the height dimension of the power conversion device along the insertion direction. In other words, even when the distance L2 is increased, the increase in the height dimension of the power conversion device can be suppressed.

[0054] Furthermore, in this embodiment, when viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap 14b. That is, when viewed along the insertion direction, the electrical component 51 is configured not to overlap with each of the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4. Therefore, it is possible to suppress the length increase of each of the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 along the insertion direction, and it is also possible to suppress the increase in the height dimension of the power conversion device along the insertion direction.

[0055] In addition, in this embodiment, the length of the guide surfaces on both the connector side and the frame side can be increased in the insertion direction, thereby improving the self-aligning accuracy of the insertion part 22 and the opening part 13.

[0056] In this embodiment, the connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are arranged with the central axis 22a at 90° intervals. For example, in Figure 6 In the cross-section shown, the connector-side guide surface 22e2 and the connector-side guide surface 22e4 are positioned 180° apart from each other about the central axis 22a. Therefore, during the process of inserting the insertion part 22 into the opening 13, the connector-side guide surfaces 22e2 and 22e4 can suppress the tilting of the insertion part 22 relative to the central axis 13a of the opening 13. Here, the tilting of the insertion part 22, limited by the connector-side guide surfaces 22e2 and 22e4, is such that it is along the axis 22a... Figure 6The paper is tilted in the direction of rotation of the axis perpendicular to the paper surface.

[0057] Similarly, the connector-side guide surface 22e1 and the connector-side guide surface 22e3 are positioned 180° apart from each other about the central axis 22a. Therefore, during the process of inserting the insertion part 22 into the opening 13, the connector-side guide surface 22e1 and the connector-side guide surface 22e3 can also suppress the tilting of the insertion part 22 relative to the central axis 13a of the opening 13. Here, the tilting of the insertion part 22, limited by the connector-side guide surface 22e1 and the connector-side guide surface 22e3, is along... Figure 6 The tilt is in the direction of rotation of the axis in the left and right directions.

[0058] As described above, the power conversion device of this embodiment includes a housing 10, a connector 20, and a washer 30. The housing 10 has a front surface 11a with an opening 13 formed therein. The housing 10 houses the electrical component 51 inside. The connector 20 has an insertion portion 22. The insertion portion 22 is inserted into the opening 13 from the front surface 11a side. The washer 30 is disposed between the insertion portion 22 and the opening 13.

[0059] The frame 10 has an inner wall surface 13b and a frame side guide surface. The frame side guide surface includes a first frame side guide surface 13c and second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4. The inner wall surface 13b contacts the washer 30. The frame side guide surface is located on the inner side of the frame 10, closer to the inner wall surface 13b in the insertion direction. The frame side guide surface is located on the inner peripheral side of the opening 13, closer to the inner wall surface 13b.

[0060] The insertion portion 22 has a first outer peripheral surface 22b and connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4. The first outer peripheral surface 22b contacts the washer 30. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are located on the inner side of the frame 10 in the insertion direction, closer to the first outer peripheral surface 22b. The connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are opposite to the frame-side guide surfaces.

[0061] Let L1 be the distance along the insertion direction between the front surface 11a and the guide surface of the frame. Let L2 be the distance along the insertion direction between the washer 30 and the front ends 22f of each of the connector side guide surfaces 22e1, 22e2, 22e3, and 22e4. In this case, distance L2 is longer than distance L1.

[0062] Here, connector 20 is an example of an insertion component. The first outer peripheral surface 22b is an example of an outer peripheral surface. Connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are examples of insertion component-side guide surfaces.

[0063] According to the above structure, since the distance L2 is longer than the distance L1, the insertion part 22 and the opening part 13 can be approximately aligned before the washer 30 contacts the front surface 11a. Therefore, it is possible to prevent the washer 30 from contacting the front surface 11a when the insertion part 22 and the opening part 13 are misaligned, thus suppressing the warping of the washer 30. As a result, the waterproofness of the power conversion device can be ensured.

[0064] In the power conversion device of this embodiment, a plurality of connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are arranged around the insertion portion 22. A gap portion 25b is formed between two adjacent connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4. When viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap portion 25b. Here, the gap portion 25b is an example of a first gap portion.

[0065] According to the above structure, the length of each of the connector side guide surfaces 22e1, 22e2, 22e3, and 22e4 along the insertion direction can be suppressed from becoming longer, and the height dimension of the power conversion device along the insertion direction can be suppressed from increasing.

[0066] In the power conversion device of this embodiment, when viewed along the insertion direction, the positions of the connector-side guide surface 22e2 and the connector-side guide surface 22e4 differ by 180° from each other with respect to the central axis 22a of the insertion portion 22. Similarly, when viewed along the insertion direction, the positions of the connector-side guide surface 22e1 and the connector-side guide surface 22e3 differ by 180° from each other with respect to the central axis 22a of the insertion portion 22. Here, the connector-side guide surface 22e2 and the connector-side guide surface 22e1 are examples of first insertion member side guide surfaces. The connector-side guide surface 22e4 and the connector-side guide surface 22e3 are examples of second insertion member side guide surfaces.

[0067] According to the above structure, the inclination of the insertion part 22 relative to the central axis 13a of the opening part 13 can be limited.

[0068] In the power conversion device of this embodiment, the connector 20 also has a flange surface 21a. The flange surface 21a contacts the front surface 11a. The insertion portion 22 also has a connector side layer difference surface 22d. The connector side layer difference surface 22d faces the inner side of the frame 10 in the insertion direction. The connector side layer difference surface 22d is located on the outer side of the frame 10 in the insertion direction, closer to the washer 30 than the washer 30. The washer 30 contacts the connector side layer difference surface 22d. Here, the connector side layer difference surface 22d is an example of an insertion component side layer difference surface.

[0069] Based on the above structure, the position of the washer 30 in the insertion direction can be determined by the connector side layer difference surface 22d. Therefore, by inserting the insertion part 22 into the opening part 13 until the flange surface 21a contacts the front surface 11a, the washer 30 in the insertion direction can be positioned.

[0070] In the power conversion device of this embodiment, connector-side guide surfaces 22e1, 22e2, 22e3, and 22e4 are each formed on the same surface as the first outer peripheral surface 22b. According to the above structure, the shape of the insertion portion 22 of the connector 20 can be simplified.

[0071] In the power conversion device of this embodiment, the frame 10 further has a frame side layering surface 13d. The frame side layering surface 13d faces the outer side of the frame 10 in the insertion direction. The frame side layering surface 13d is formed between the inner wall surface 13b and the first frame side guide surface 13c.

[0072] According to the above structure, when the insertion part 22 is inserted into the opening part 13 or after the insertion part 22 is inserted into the opening part 13, the frame side layer surface 13d acts as an anti-detachment member to prevent the washer 30 from falling off the insertion part 22. Therefore, it is not necessary to form a groove for receiving the washer 30 on the first outer peripheral surface 22b of the insertion part 22. Therefore, when the connector 20 is a molded part formed using a mold, a sliding mold for forming the groove is not required. As a result, the mold structure for forming the connector 20 can be simplified, and thus, the manufacturing cost of the power conversion device can be reduced.

[0073] In the power conversion device of this embodiment, the frame-side guide surface has a first frame-side guide surface 13c and a plurality of second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4. The plurality of second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4 are respectively disposed on the inner side of the frame 10, closer to the first frame-side guide surface 13c in the insertion direction. The plurality of second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4 are arranged around the opening 13. A gap 14b is formed between two adjacent second frame-side guide surfaces among the plurality of second frame-side guide surfaces 13e1, 13e2, 13e3, and 13e4. When viewed along the insertion direction, the electrical component 51 is configured to overlap with the gap 14b. Here, the gap 14b is an example of a second gap.

[0074] According to the above structure, the length of each of the second frame side guide surfaces 13e1, 13e2, 13e3, and 13e4 along the insertion direction can be suppressed from becoming longer, and the increase in the height dimension of the power conversion device along the insertion direction can be suppressed.

[0075] In this embodiment, connector 20 is exemplified as an insertion member, but the insertion member is not limited to connector 20. For example, if a frame cover is provided at the opening of the frame and a gasket is provided between the outer peripheral surface of the frame cover and the inner wall surface of the opening, the insertion member may also be the frame cover. (Symbol Explanation)

[0076] 10 Frame; 11 Frame body; 11a Front; 11b Back; 12 Cover; 13 Opening; 13a Central axis; 13b Inner wall surface; 13c First frame side guide surface; 13d Frame side layer difference surface; 13e1, 13e2, 13e3, 13e4 Second frame side guide surfaces; 14a1, 14a2, 14a3, 14a4 Frame side guide portions; 14b Gap portion; 20 Connector; 21 Connector body portion; 21a Flange surface ; 22 Insertion part; 22a Central shaft; 22b First outer peripheral surface; 22c Second outer peripheral surface; 22d Connector side layer difference surface; 22e1, 22e2, 22e3, 22e4 Connector side guide surface; 22f Front end; 23 Socket; 24 Terminal; 25a1, 25a2, 25a3, 25a4 Connector side guide part; 25b Gap part; 30 Washer; 40 Screw; 50 Control board; 51 Electrical components; L1, L2 distance.

Claims

1. A power conversion device, characterized in that, include: A frame having a front with an opening and housing electrical components inside; An insertion member having an insertion portion that inserts into the opening from the front side; and A washer is disposed between the insertion portion and the opening portion. The frame has: an inner wall surface that contacts the washer; and a frame side guide surface disposed on the inner side of the frame, in the insertion direction of the insertion portion, closer to the inner wall surface than the inner wall surface. The frame side guide surface is located on the inner peripheral side of the opening, which is closer to the inner wall surface. The insertion portion has: an outer peripheral surface that contacts the washer; and at least one insertion component-side guide surface, which is disposed on the inner side of the frame body in the insertion direction than the outer peripheral surface. At least one of the insertion component side guide surfaces is opposite to the frame side guide surface. When the distance along the insertion direction between the front surface and the side guide surface of the frame is defined as L1, and the distance along the insertion direction between the washer and the front end of at least one side guide surface of the insertion component is defined as L2, distance L2 is longer than distance L1. At least one of the insertion component side guide surfaces is a plurality of insertion component side guide surfaces. Multiple insertion component side guide surfaces are arranged around the insertion portion. A first gap is formed between two adjacent insertion component side guide surfaces in the plurality of insertion component side guide surfaces. When viewed along the insertion direction, the electrical component is configured to overlap with the first gap.

2. The power conversion device as described in claim 1, characterized in that, The plurality of insertion component side guide surfaces include a first insertion component side guide surface and a second insertion component side guide surface. When viewed along the insertion direction, the positions of the first insertion component side guide surface and the second insertion component side guide surface are 180° apart from each other with the central axis of the insertion part as the center.

3. The power conversion device as described in claim 1, characterized in that, The insertion component also has a flange surface that contacts the front side. The insertion part further has an insertion component side layer surface facing the inside of the frame in the insertion direction. The side layer of the insertion component is located on the outer side of the frame, which is closer to the washer than the washer in the insertion direction. The washer is in contact with the side layer of the insertion component.

4. The power conversion device as described in claim 2, characterized in that, The insertion component also has a flange surface that contacts the front side. The insertion part further has an insertion component side layer surface facing the inside of the frame in the insertion direction. The side layer of the insertion component is located on the outer side of the frame, which is closer to the washer than the washer in the insertion direction. The washer is in contact with the side layer of the insertion component.

5. The power conversion device as described in any one of claims 1 to 4, characterized in that, At least one of the insert component side guide surfaces is formed on the same surface as the outer peripheral surface.

6. The power conversion device as described in any one of claims 1 to 4, characterized in that, The frame also has a frame side layer difference surface facing the outer side of the frame in the insertion direction. The frame side layer is formed between the inner wall surface and the frame side guide surface.

7. The power conversion device as described in claim 5, characterized in that, The frame also has a frame side layer difference surface facing the outer side of the frame in the insertion direction. The frame side layer is formed between the inner wall surface and the frame side guide surface.

8. A power conversion device, characterized in that, include: A frame having a front with an opening and housing electrical components inside; An insertion member having an insertion portion that inserts into the opening from the front side; and A washer is disposed between the insertion portion and the opening portion. The frame has: an inner wall surface that contacts the washer; and a frame side guide surface disposed on the inner side of the frame, in the insertion direction of the insertion portion, closer to the inner wall surface than the inner wall surface. The frame side guide surface is located on the inner peripheral side of the opening, which is closer to the inner wall surface. The insertion portion has: an outer peripheral surface that contacts the washer; and at least one insertion component-side guide surface, which is disposed on the inner side of the frame body in the insertion direction than the outer peripheral surface. At least one of the insertion component side guide surfaces is opposite to the frame side guide surface. When the distance along the insertion direction between the front surface and the side guide surface of the frame is defined as L1, and the distance along the insertion direction between the washer and the front end of at least one side guide surface of the insertion component is defined as L2, distance L2 is longer than distance L1. The frame-side guide surface has: a first frame-side guide surface; and a plurality of second frame-side guide surfaces, wherein the plurality of second frame-side guide surfaces are disposed on the inner side of the frame in the insertion direction than the first frame-side guide surface. Multiple second frame side guide surfaces are arranged around the opening. A second gap is formed between two adjacent second frame side guide surfaces in a plurality of second frame side guide surfaces. When viewed along the insertion direction, the electrical component is configured to overlap with the second gap.

9. The power conversion device as described in claim 8, characterized in that, The insertion component also has a flange surface that contacts the front side. The insertion part further has an insertion component side layer surface facing the inside of the frame in the insertion direction. The side layer of the insertion component is located on the outer side of the frame, which is closer to the washer than the washer in the insertion direction. The washer is in contact with the side layer of the insertion component.

10. The power conversion device as claimed in claim 8, characterized in that, At least one of the insert component side guide surfaces is formed on the same surface as the outer peripheral surface.

11. The power conversion device as claimed in claim 9, characterized in that, At least one of the insert component side guide surfaces is formed on the same surface as the outer peripheral surface.

12. The power conversion device according to any one of claims 8 to 11, characterized in that, The frame also has a frame side layer difference surface facing the outer side of the frame in the insertion direction. The frame side layer is formed between the inner wall surface and the frame side guide surface.

Images