Power conversion device
Provided is a power conversion device that has improved assembling workability and that realizes downsizing thereof. The power conversion device includes: an electrical component; a casing enclosing the electrical component and terminals connected to the electrical component and an outside, the casing having a plurality of opening portions in which the terminals are disposed; and a casing lid covering the opening portions. A shaft seal provided so as to be in contact with a side surface contiguous with a rim of an opening portion among the opening portions, and a surface seal provided so as to be in contact with a surface contiguous with a rim of an opening portion among the opening portions, are disposed so as to be in contact with the casing lid.
1. A power conversion device comprising:
an electrical component;
a casing enclosing the electrical component and terminals connected to the electrical component and an outside, the casing having opening portions in which the terminals are disposed; and
a casing lid covering the opening portions, and including bushes integrated with the casing lid and screws for attaching the casing lid to the casing,
wherein each of the screws is, at a non-rolled portion thereof between a rolled portion of the screw and a head portion of the screw, retained by a corresponding bush among the bushes, and
wherein a shaft seal provided so as to be in contact with a side surface contiguous with a rim of a first opening portion among the opening portions, and a surface seal provided so as to be in contact with a surface contiguous with a rim of a second opening portion among the opening portions, are disposed so as to be in contact with the casing lid.
2. The power conversion device according to claim 1 , wherein the terminal in the first opening portion on which the shaft seal is provided is an AC load terminal.
3. The power conversion device according to claim 1 , wherein the screws are arranged around the surface seal.
4. The power conversion device according to claim 1 , wherein, for each of internal thread portions which are provided to the casing and to each of which a corresponding screw is fastened, a counterbore to which the rolled portion is fitted is provided at a portion contiguous with the internal thread portion.
5. The power conversion device according to claim 1 , wherein the casing lid is formed by resin molding.
6. The power conversion device according to claim 1 , wherein the casing lid is formed by metal sheet press working.
7. The power conversion device according to claim 1 , wherein the casing lid is formed by aluminum die-casting.
8. The power conversion device according to claim 1 , wherein each of the bushes is formed by metal sheet deep drawing, machining, or forging.
9. The power conversion device according to claim 1 , wherein each of the bushes is made of an aluminum alloy.
10. The power conversion device according to claim 1 , wherein the casing lid includes an interlock connector to be engaged with a connector provided in the second opening portion.
11. The power conversion device according to claim 10 , wherein a housing portion of the interlock connector is formed by resin molding so as to be integrated with the casing lid.
12. The power conversion device according to claim 10 , wherein a terminal portion of the interlock connector is insert-molded into the casing lid.
13. The power conversion device according to claim 1 , wherein the casing lid includes a projection between the casing lid and the terminal in the second opening portion on which the surface seal is provided.
14. The power conversion device according to claim 1 , wherein the shaft seal includes a protrusion to be fitted to a hole formed in the casing lid.