Telescopic lift vehicle comprising an arm (B) hydraulically operated in elevation by means of- a one-way hydraulic pump arranged to be rotated by a prime mover,- a hydraulic oil accumulation tank (T),- a damping tank (HST),- a double-action hydraulic actuator (HA), comprising a first chamber (HA1), for lifting the arm (B), and a second chamber (HA2), for lowering the arm, opposite the first, arranged to be hydraulically powered by- a hydraulic circuit (HC) comprising+ a proportional main valve (V) , arranged to assume a rest position (Vb) in which the hydraulic circuit is isolated from both the hydraulic pump and the accumulation tank (T), and a first actuation position (Vc), to connect the second chamber (HA2) of the hydraulic actuator with the hydraulic pump (P) and the first chamber (HA1) of the hydraulic actuator with the buffer tank (T),+ a first valve (V1) arranged to assume at least one energized position (Vlb), in which it allows bidirectional communication between the hydraulic damping reservoir (HST) and the first chamber (HA1) of the hydraulic actuator,+ a second valve (V2) arranged to assume an energized position (V2b), in which it allows a bidirectional circulation of the hydraulic oil between the two chambers;the vehicle comprising processing means (ECU) configured to perform- a first operating configuration (C1) in which said first valve (V1) is energized (ON) and said second valve (V2) is de-energized (OFF) when said main valve (V) is in rest position (Vb) and the arm is raised,- a second operating configuration (C2) in which said second valve (V2) is energized and said first valve (V1) is de-energized when said main valve (V) is in said first actuation position (Vc).
TELESCOPIC HANDLER
TELESKOPISCHE HANDHABUNGSVORRICHTUNG
MANIPULATEUR TÉLESCOPIQUE
2024-07-03
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
Online Contents | 2010