JPS6225346U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the main parts of the hydraulic shock absorber;
The figure is a sectional view taken along the line 2--2 in the first figure, FIG. 3 is a sectional view of the main part showing the state in which the spool is pushed down, and FIG. 4 is a characteristic diagram of the damping force. 10: hydraulic shock absorber, 12: cylinder, 14: piston, 16: piston rod, 22, 24: liquid chamber, 44: hole, 46: first passage, 48: second passage, 50: spool, 52: Space, 54: 3rd
Passage, 56: Spring.

Claims (1)

[Scope of utility model registration request] a cylinder; a piston movably disposed within the cylinder and partitioning the interior of the cylinder into first and second liquid chambers; and a piston rod coupled to the piston and communicating with the first liquid chamber. a hole extending in the axial direction from the hole, a first passage extending from the hole to the outer peripheral surface and communicating with the second liquid chamber, and a portion of the hole located farther from the piston than the first passage to the outer peripheral surface. a piston rod having a second passage extending to and communicating with the second liquid chamber and having a diameter smaller than the diameter of the first passage; and a piston rod disposed movably in the axial direction within the hole of the piston rod. a spool that defines a space in which the second passage always communicates, the spool having a third passage that allows the hole to communicate with the first passage; and a spool that directs the spool toward the second passage. a hydraulic shock absorber comprising a spring biased by a spring;