EP 1038070 A1 20000927 - HYDRAULIC CONTROL MECHANISM FOR A MOBILE MACHINE TOOL, ESPECIALLY A WHEEL LOADER, FOR DAMPING LONGITUDINAL OSCILLATIONS
Title (en)
HYDRAULIC CONTROL MECHANISM FOR A MOBILE MACHINE TOOL, ESPECIALLY A WHEEL LOADER, FOR DAMPING LONGITUDINAL OSCILLATIONS
Title (de)
HYDRAULISCHE STEUERANORDNUNG FÜR EINE MOBILE ARBEITSMASCHINE, INSBESONDERE FÜR EINEN RADLADER, ZUR DÄMPFUNG VON NICKSCHWINGUNGEN
Title (fr)
SYSTEME DE COMMANDE HYDRAULIQUE POUR ENGIN MOBILE, NOTAMMENT POUR CHARGEUSE SUR ROUES, AFIN D'AMORTIR LES OSCILLATIONS DUES AU TANGAGE
Publication
Application
Priority
- DE 19754828 A 19971210
- EP 9807509 W 19981121
Abstract (en)
[origin: DE19754828A1] The invention relates to a hydraulic control mechanism for a mobile machine tool, especially a wheel loader, for damping longitudinal oscillations. The inventive hydraulic control mechanism comprises at least one hydraulic cylinder (12) which helps to move a working tool, a directional control valve (11) for controlling the paths of the hydraulic fluid between a pressure chamber (15) of the hydraulic cylinder (12), a source of hydraulic fluid and a tank (27), and a hydraulic accumulator (21) which can be connected to a source of hydraulic fluid by means of a filling valve (22; 71) located in a filling line (20), whose charge pressure can be increased to a maximum pressure by means of said filling valve (22; 71) and which can be connected to the pressure chamber (15) of the hydraulic cylinder (12) in order to dampen the longitudinal oscillations. The inventive mechanism also has a shut-off valve (22; 75) which can be moved into a through position in which hydraulic fluid can flow through from the hydraulic accumulator (21) to the pressure chamber (15) of the hydraulic cylinder (12) and vice versa, when a first condition is fulfilled. According to the invention, the shut-off valve (22; 75) can also be moved into its shut-off position when the first condition is fulfilled in the event that the charge pressure in the pressure chamber (15) of the hydraulic cylinder (12) or the accumulator pressure reaches a maximum pressure.
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01); F15B 1/02 (2006.01); F15B 21/14 (2006.01)
CPC (source: EP KR US)
E02F 9/2207 (2013.01 - EP KR US); E02F 9/2217 (2013.01 - EP KR US); E02F 9/2267 (2013.01 - EP KR US); E02F 9/2271 (2013.01 - EP US); E02F 9/2285 (2013.01 - KR); F15B 1/021 (2013.01 - EP KR US)
Citation (search report)
See references of WO 9929970A1
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 19754828 A1 19990624; DE 19754828 C2 19991007; EP 1038070 A1 20000927; JP 2001526335 A 20011218; KR 20010032948 A 20010425; US 6351944 B1 20020305; WO 9929970 A1 19990617
DOCDB simple family (application)
DE 19754828 A 19971210; EP 9807509 W 19981121; EP 98963493 A 19981121; JP 2000524525 A 19981121; KR 20007006293 A 20000609; US 58130100 A 20000609