Shock absorber
AssigneeHitachi Astemo, Ltd.
InventorYuki Kurihara
Life of this patent
Estimating the term…
Abstract
A shock absorber includes a cylinder and a movable piston rod inserted into the cylinder to be movable to generate a damping force and having one end which extends to the outside of the cylinder. A seal member is fixed to the cylinder to be in sliding contact with the piston rod, and a friction member generates a frictional force with respect to relative movement between the cylinder and the piston rod. The friction member includes first and second friction parts, respectively fixed to one of the cylinder and the piston rod to be in sliding contact with the other of the cylinder and the piston rod. The second friction part is configured to start to slide with respect to relative movement of the cylinder and the piston rod at a timing different from that of the first friction part and generate an adjustable frictional force.
Claims6
A shock absorber comprising:
- a cylinder;
- a piston rod inserted into an inside of the cylinder to be movable to generate a damping force at a time of moving in the cylinder and having one end which extends to an outside of the cylinder;
- a seal member fixed to the cylinder to be in sliding contact with the piston rod;
- and
- a friction member generating a frictional force with respect to a relative movement between the cylinder and the piston rod,
- wherein the friction member includes:
- a first friction part fixed to one of the cylinder and the piston rod to be constantly in sliding contact with another of the cylinder and the piston rod;
- and
- a second friction part fixed to one of the cylinder and the piston rod to be constantly in sliding contact with another of the cylinder and the piston rod and configured to start to slide with respect to a relative movement of the cylinder and the piston rod at a timing different from that of the first friction part and has a higher rigidity than the first friction part, and
- wherein the friction member is a unitary member.
A shock absorber comprising:
- a first member connected to a wheel side;
- a second member connected to a vehicle body side to be movable relative to the first member and configured to generate a damping force at a time of moving with respect to the first member;
- a seal member provided to the first member;
- and
- a friction member generating a frictional force with respect to a relative movement between the first member and the second member,
- wherein the friction member includes:
- a first friction part fixed to one of the first member and the second member to be constantly in contact with another of the first member and the second member;
- and
- a second friction part, formed of a material different from that of the first friction part such that a coefficient of dynamic friction and a coefficient of static friction of the material of the second friction part is different than a material of the first friction part, and fixed to one of the first member and the second member to be constantly in contact with another of the first member and the second member.
Dependencies are inferred from the claim text.