Title:
SPOOL VALVE TYPE SHOCK ABSORBER
Document Type and Number:
Japanese Patent JP2020180691
Kind Code:
A
Abstract:
To provide a spool valve type shock absorber which can generate attenuation forces in an elongation stroke and a contraction stroke without generating a seating sound.SOLUTION: The spool valve type shock absorber includes an attenuation force generation device 16 comprising a spool valve element 52 which is reciprocally fit into a cylindrical portion 14A, and pressurized by a pair of compression coiled springs 54, 56 from both sides. The cylindrical portion has openings 48, 50 for a first elongation stroke and a first contraction stroke, and the spool valve element has openings 66, 68 for a second elongation stroke and a second contraction stroke. When a piston 14 is displaced to a cylinder 12, the attenuation force generation device 16 displaces the spool valve element 52 by a pressure difference between a cylinder upper chamber and a cylinder lower chamber, and changes a degree of the overlap of the openings for the first and second elongation strokes in the elongation stroke, and a degree of the overlap of the openings of the first and second contraction strokes in the contraction stroke.SELECTED DRAWING: Figure 2
Inventors:
MIZUNO KAZUYUKI
Application Number:
JP2019086355A
Publication Date:
November 05, 2020
Filing Date:
April 26, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F16F9/46; F16F9/34
Domestic Patent References:
| JP2006292041A | 2006-10-26 | |||
| JPH0436142U | 1992-03-26 | |||
| JPH0242224A | 1990-02-13 | |||
| JP2017180563A | 2017-10-05 | |||
| JPH0244115Y2 | 1990-11-22 |
Attorney, Agent or Firm:
Patent business corporation Prospec patent office