JPS57171134A - Hydraulic buffer - Google Patents

Hydraulic buffer

Info

Publication number
JPS57171134A
JPS57171134A JP5530381A JP5530381A JPS57171134A JP S57171134 A JPS57171134 A JP S57171134A JP 5530381 A JP5530381 A JP 5530381A JP 5530381 A JP5530381 A JP 5530381A JP S57171134 A JPS57171134 A JP S57171134A
Authority
JP
Japan
Prior art keywords
oil
piston rod
passage
spring bearer
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5530381A
Other languages
Japanese (ja)
Inventor
Tomeo Fuse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Corp
Original Assignee
Showa Seisakusho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Showa Seisakusho Co Ltd filed Critical Showa Seisakusho Co Ltd
Priority to JP5530381A priority Critical patent/JPS57171134A/en
Publication of JPS57171134A publication Critical patent/JPS57171134A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PURPOSE:To prevent the bottom of a hydraulic buffer from being hit, by providing a fluid passage in a piston rod and equipping the passage with a shutoff valve which closes when the speed of a piston has exceeded a prescribed level in the pushing process. CONSTITUTION:A spring bearer 7, which is screwed on the tip of a piston rod 1, is provided with a plurality of oil holes 10 extending in radial directions. The piston rod 1 is provided with an oil passage 11 which extends in the axial direction and communicates with the oil holes 10 of the spring bearer 7. The oil passage 11 communicates with an oil chamber A on the top of a piston through oil passages 11a extending in radial directions. A step 12 is provided at the lower end of the axial oil passage 11 of the piston rod 1. A cylindrical shutoff valve 13 is provided between the step 12 and the closed part of the spring bearer 7 so that the valve can slide in the axial direction. The valve 13 is normally pushed on the lower closed part of the spring bearer 7 by a coiled spring 14. The upper oil chamber A and a lower oil chamber B communicate with each other through the oil holes 10, 16 and the oil passages 11, 11a.
JP5530381A 1981-04-13 1981-04-13 Hydraulic buffer Pending JPS57171134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5530381A JPS57171134A (en) 1981-04-13 1981-04-13 Hydraulic buffer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5530381A JPS57171134A (en) 1981-04-13 1981-04-13 Hydraulic buffer

Publications (1)

Publication Number Publication Date
JPS57171134A true JPS57171134A (en) 1982-10-21

Family

ID=12994795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5530381A Pending JPS57171134A (en) 1981-04-13 1981-04-13 Hydraulic buffer

Country Status (1)

Country Link
JP (1) JPS57171134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562707A (en) * 2012-03-26 2012-07-11 南通久久液压机械制造有限公司 Compact buffering cylinder
US11187299B1 (en) * 2021-03-30 2021-11-30 Ningbo Fenghua Rising New Energy Technology Co., Ltd. Bidirectional self-locking damper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562707A (en) * 2012-03-26 2012-07-11 南通久久液压机械制造有限公司 Compact buffering cylinder
US11187299B1 (en) * 2021-03-30 2021-11-30 Ningbo Fenghua Rising New Energy Technology Co., Ltd. Bidirectional self-locking damper

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