Pressure buffer device and suspension device
A pressure buffer device includes a bypass path configured to form a channel of the oil from the a second oil chamber to the a first oil chamber, a slit valve connected to the bypass path, configured to form an inflow route of the oil from the bypass path to a pressure chamber, and having a channel sectional area smaller than a channel sectional area of the bypass path, and a communication path connected to the bypass path, configured to form an inflow route of the oil from the bypass path to an annular recess, and having a channel sectional area larger than the channel sectional area of the slit valve and smaller than the channel sectional area of the bypass path.
1. A pressure buffer device comprising:
a cylinder configured to store liquid;
a partitioning member configured to partition a space in the cylinder into a first liquid chamber and a second liquid chamber for storing the liquid;
a channel section configured to form a channel of the liquid from the second liquid chamber to the first liquid chamber;
a releasing and blocking section configured to release and block a flow of the liquid flowing from the second liquid chamber to the first liquid chamber via the channel section;
a first space forming section opposed to one side of the releasing and blocking section and configured to form a space for receiving inflow of the liquid;
a second space forming section opposed to the other side of the releasing and blocking section and configured to form a space for receiving inflow of the liquid;
a first inflow section connected to the channel section, configured to form an inflow route of the liquid from the channel section to the first space forming section, and having a channel sectional area smaller than a channel sectional area of the channel section; and
a second inflow section connected to the channel section, configured to form an inflow route of the liquid from the channel section to the second space forming section, and having a channel sectional area larger than the channel sectional area of the first inflow section and smaller than the channel sectional area of the channel section.
2. The pressure buffer device according to claim 1 , wherein
the partitioning member includes a communication channel configured to allow the flow of the liquid between the first liquid chamber and the second liquid chamber,
the pressure buffer device further comprises a rod member, which is a bar-like member,
the rod member is configured to hold one end side of the partitioning member in an axis direction and move in the axis direction, and
the channel section is formed in the rod member.
3. The pressure buffer device according to claim 1 , further comprising:
an opposed member provided to be opposed to the releasing and blocking section,
wherein the second inflow section is configured by a cutout provided in the opposed member and formed to connect the channel section and the second space forming section.
4. The pressure buffer device according to claim 1 , further comprising:
an opposed member provided to be opposed to the releasing and blocking section,
wherein the second inflow section is configured by a hole provided in the opposed member and formed to connect the channel section and the second space forming section.
5. A suspension device comprising:
a spring configured to reduce a vibration and a shock; and
a pressure buffer device configured to damp a vibration by the spring, wherein
the pressure buffer device includes:
a cylinder configured to store liquid;
a partitioning member configured to partition a space in the cylinder into a first liquid chamber and a second liquid chamber for storing the liquid;
a channel section configured to form a channel of the liquid from the second liquid chamber to the first liquid chamber;
a releasing and blocking section configured to release and block a flow of the liquid flowing from the second liquid chamber to the first liquid chamber via the channel section;
a first space forming section opposed to one side of the releasing and blocking section and configured to form a space for receiving inflow of the liquid;
a second space forming section opposed to the other side of the releasing and blocking section and configured to form a space for receiving inflow of the liquid;
a first inflow section connected to the channel section, configured to form an inflow route of the liquid from the channel section to the first space forming section, and having a channel sectional area smaller than a channel sectional area of the channel section; and
a second inflow section connected to the channel section, configured to form an inflow route of the liquid from the channel section to the second space forming section, and having a channel sectional area larger than the channel sectional area of the first inflow section and smaller than the channel sectional area of the channel section.
6. The suspension device according to claim 5 , wherein
the partitioning member includes a communication channel configured to allow the flow of the liquid between the first liquid chamber and the second liquid chamber,
the pressure buffer device further comprises a rod member, which is a bar-like member,
the rod member is configured to hold one end side of the partitioning member in an axis direction and move in the axis direction, and
the channel section is formed in the rod member.
7. The suspension device according to claim 5 , further comprising:
an opposed member provided to be opposed to the releasing and blocking section,
wherein the second inflow section is configured by a cutout provided in the opposed member and formed to connect the channel section and the second space forming section.
8. The suspension device according to claim 5 , further comprising:
an opposed member provided to be opposed to the releasing and blocking section,
wherein the second inflow section is configured by a hole provided in the opposed member and formed to connect the channel section and the second space forming section.