| 摘要 |
The present invention reduces the number of components in a mechanism for absorbing pressure fluctuations during liquid expansion, simplifies assembly, and reduces component costs. In order to do so, this accumulator has a seal holder provided in a bellows cap, and a plate-shaped seal held by the seal holder. The seal holder is provided with an inward-facing flange-shaped outer-circumferential-side engaging part, while the seal is provided with an outward-projection-shaped inner-circumferential-side engaging part which comprises a rubber elastic, engages the outer-circumferential-side engaging part, and is provided on the outer circumference of the seal body. When a liquid expands inside a liquid chamber while the liquid chamber is closed, the outer-circumferential-side engaging part elastically deforms the inner-circumferential-side engaging part, the seal remains seated on the seating surface as a result of the difference between the pressure-receiving surface areas on both surfaces thereof, and the bellows cap moves to a position at which the liquid pressure and the gas pressure are balanced. |
