Hydraulic automatic-shock-absorbing hinge device
OwnerJong-bok Janginventor
Life of this patent
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Abstract
In a hinge device, right-hand spiral cams formed on a lower portion of a rotational shaft are engaged with right-hand spiral guides grooves, and left-hand inclinated guide protrusions are engaged with left-hand spiral guide grooves formed on an outer circumference of an elevating pipe. When the elevating pipe moves upwardly or downwardly, the load produced by hydraulic pressure can be applied uniformly to the shaft. Therefore, it is improbable to break out or cut out the spiral cam formed on the shaft, the spiral guide grooves on the elevating pipe and the guide protrusion on the stationary pipe. As a result, the hinge device has a relatively long life-time. Also, the hinge device can reduce or prevent damage in respect of life and property.
Claims7
An automatic hydraulic shock-absorbing hinge device comprising:
- an outer moving body formed integrally with one coupling piece, including a first uneveness portion formed vertically on an upper end and inner circumference portion of the outer moving body;
- a cylinder disposed in an inner lower portion of the outer moving body including a flow path on the one side thereof, and an oil supplement tank on an outer circumference thereof;
- an oil leak preventing cover threadedly engaged with the outer moving body on the lower end portion of the body for sealing the lower end of the cylinder;
- a stationary pipe threadedly engaged and fixed with the outer moving body on a middle and inner circumference portion of the body, and the stationary pipe including a pair of left-hand inclinated guide protrusions extending opposedly with each other;
- an elevating pipe inserted within the stationary pipe, and the elevating pipe including a pair of left-hand spiral guide grooves on the outer circumference and having opposed potions with each other and a pair of right-hand spiral grooves on the inner circumference and having opposed portions with each other, so that the pair of the left-hand spiral grooves are engaged and guided with the guide protrusions of the stationary pipe;
- a piston disposed on a lower end of the elevating pipe and inserted in the cylinder for being moved upwardly and downwardly, and the piston including a check valve on a middle and end portion thereof;
- a rotational shaft disposed on an upper portion of the outer moving body, and the shaft including a pair of right-hand spiral cams protruded and opposed with each other on a lower portion of the shaft and a restricting wheel having an oil leakage preventing 0-ring fitted therearound on an upper end of the cams, wherein the pair of the right-hand spiral cams can be engaged and guided with the right-hand spiral guide grooves of the elevating pipe;
- a support pipe for supporting the shaft, including a second uneveness portion formed vertically on a lower and outer circumference portion of the support pipe and engaged with the first uneveness portion for preventing the outer moving body and the support pipe from idling with each other, and a recess groove formed along and on the outer circumference of the support pipe and matched with a vertical removal-preventing snap ring;
- a first cap and a second cap fitted, respectively, on both upper end and lower end of another coupling piece;
- an oil leakage preventing cover around which the second cap is fitted;
- and
- a coil spring within the second cap, of which one end is fixed on the oil leakage preventing cover, and of which another end is fixed on a lower cover.
Dependencies are inferred from the claim text.