EP 2597319 B1 20180919 - HYDRAULIC OIL CYLINDER, CORRELATIVE DEVICE THEREOF, HYDRAULIC CUSHION SYSTEM, EXCAVATOR AND CONCRETE PUMP TRUCK
Title (en)
HYDRAULIC OIL CYLINDER, CORRELATIVE DEVICE THEREOF, HYDRAULIC CUSHION SYSTEM, EXCAVATOR AND CONCRETE PUMP TRUCK
Title (de)
HYDRAULIKÖLZYLINDER, KORRELATIVE VORRICHTUNG DAMIT, HYDROKISSENSYSTEM, BAGGER UND BETONMISCHER
Title (fr)
VÉRIN À HUILE HYDRAULIQUE, DISPOSITIF ASSOCIÉ À CELUI-CI, SYSTÈME D'AMORTISSEUR HYDRAULIQUE, EXCAVATRICE ET CAMION-POMPE À BÉTON
Publication
Application
Priority
- CN 201010235137 A 20100723
- CN 2011076025 W 20110621
Abstract (en)
[origin: EP2597319A1] A hydraulic oil cylinder has a cushion collar (4), which is sleeved in the cushion position of a piston rod and can axially slide along the piston rod (3). In the oil cylinder cavity between an oil hole (1-1) of the rod cavity and the terminal position of the piston end surface of the rod cavity during the piston (6) extending movement, a sealing end surface of the rod cavity (1-2) is provided, which can block the cushion collar and contact with the first end surface of the cushion collar to form a sealing surface. At least a throttle oil channel (3-5) is provided between the cushion collar and the piston rod. During the piston extending movement, from the moment that the first end surface of the cushion collar contacts with the sealing end surface of the rod cavity and a sealing surface is formed to the moment that the piston reaches the terminal position of the extending movement, the hydraulic oil at the side of the sealing surface close to the piston can be discharged towards the oil hole of the rod cavity through the throttle oil channel. The hydraulic oil cylinder has advantages of facility of manufacturing the cushion structure and good effect. The hydraulic oil cylinder can be used in a hydraulic cushion system, an excavator and a concrete pump truck.
IPC 8 full level
F15B 15/14 (2006.01); F04B 7/04 (2006.01); F15B 15/22 (2006.01)
CPC (source: EP US)
F04B 7/04 (2013.01 - US); F15B 15/222 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2597319 A1 20130529; EP 2597319 A4 20150715; EP 2597319 B1 20180919; AU 2011282321 A1 20130207; AU 2011282321 B2 20160922; AU 2011282321 B9 20161215; BR 112013001759 A2 20160531; BR 112013001759 B1 20210420; CA 2805789 A1 20120126; CA 2805789 C 20180501; CN 102108990 A 20110629; CN 102108990 B 20111228; RU 2013100913 A 20140827; RU 2564161 C2 20150927; US 2013209296 A1 20130815; WO 2012010032 A1 20120126
DOCDB simple family (application)
EP 11809220 A 20110621; AU 2011282321 A 20110621; BR 112013001759 A 20110621; CA 2805789 A 20110621; CN 201010235137 A 20100723; CN 2011076025 W 20110621; RU 2013100913 A 20110621; US 201113811636 A 20110621