Seal structure and shock absorber
OwnerShigeru Kojimainventor
Life of this patent
Estimating the term…
Abstract
A piston rod (3) is connected to a piston (2) in a cylinder (1) and projects axially from the cylinder (1). A rod guide (7) guiding the piston rod (3) in an axial direction and a ring shaped member (5) disposed in the vicinity of the rod guide (6) are respectively fixed to the cylinder (1). An oil seal (6) for the piston rod (3) comprises a flange portion (21) and a lip portion (20) projecting from the flange portion (21) so as to be in contact with the piston rod (3). By gripping the flange member (21) with the rod guide (7) and the ring shaped member (5), fitting and replacement of the oil seal (6) is facilitated. Further, by forming a space (25) in the rod guide (7) for housing the lip portion (20), stress occurring in the oil seal (6) can be suppressed.
Claims10
A seal structure between a cylinder and a rod which projects axially from the cylinder, comprising:
- a rod guide fixed to the cylinder for guiding the rod in an axial direction;
- a ring shaped member disposed adjacent to the rod guide and fixed to the cylinder, the ring shaped member having an opening through which the rod penetrates;
- and
- an oil seal in contact with the rod, the oil seal comprising a flange portion which is gripped by the rod guide and the ring shaped member, and a lip portion projecting inward from the flange portion to be in contact with the rod.
A hydraulic shock absorber comprising:
- a cylinder;
- a piston housed in the cylinder;
- a rod connected to the piston and projecting axially from the cylinder;
- a rod guide fixed to the cylinder for guiding the rod in an axial direction;
- a ring shaped member disposed adjacent to the rod guide and fixed to the cylinder, the ring shaped member having an opening through which the rod penetrates;
- and
- an oil seal in contact with the rod, the oil-seal comprising a flange portion which is gripped by the rod guide and the ring shaped member, and a lip portion projecting inward from the flange portion to be in contact with the rod.
Dependencies are inferred from the claim text.