摘要:
Es wird ein Federungssystem für ein land- oder bauwirtschaftliches Fahrzeug (10) beschrieben. Das Federungssystem (22) umfasst zwei Hydraulikzylinder (18, 20), die einen Rahmen (12) gegenüber einer Achse (14, 16) des Fahrzeugs (10) abstützen, wobei die Hydraulikzylinder (18, 20) jeweils eine kolbenseitige Kammer (26, 28) und eine kolbenstangenseitige Kammer (30, 32) aufweisen und wobei jeweils die Kammern (26, 28, 30, 32) der Hydraulikzylinder (18, 20) über mit einem Schaltventil (42, 44) versehene Verbindungsleitungen (34, 36, 38, 40) miteinander verbindbar sind, eine erste Versorgungsleitung (46), die über ein Schaltventil (50) mit der kolbenseitigen Verbindungsleitung (36) des ersten Hydraulikzylinders (18) verbindbar ist, eine zweite Versorgungsleitung (48), die über ein Schaltventil (52) mit der kolbenseitigen Verbindungsleitung (40) des zweiten Hydraulikzylinders (20) verbindbar ist, jeweils einen mit den Versorgungsleitungen (46, 48) über proportional verstellbare Blenden (58, 64) verbindbaren Hydraulikspeicher (54, 60), eine Hydraulikquelle (126), einen Hydrauliktank (100), eine Steuerventileinrichtung (24, 24') und eine elektronische Steuereinheit (120). Um die Aktivierung eines Federungszustands in kritischen Fahrzeugzuständen zu vermeiden, wird vorgeschlagen, dass Mittel zur Detektion und Kompensation von Lastzuständen des Fahrzeugs (10) im Federungssystem (22) vorgesehen sind.
摘要:
A suspension (1300) for a vehicle is provided. The suspension includes a frame (402) and a releasable locking assembly (1314, 1318, 1320, 1322). The releasable locking assembly has a first assembly (1314) movably coupled to the frame, and a second assembly (1318) movably coupled to the frame, and wherein movement of the frame relative to the first and second assemblies causes the first and second assemblies to engage each other to limit further movement of the frame in at least a first direction.
摘要:
An axle tilt control apparatus for forklifts is disclosed. The forklift includes a rear axle (13) pivotally supported by a body frame (2) and a rear axle (50) rigidly fixed to the body frame (2). A mast (3) is supported at the front portion of the body frame (2) to tilt forward and backward. Forks (5) are supported by the mast (3) to be lifted and lowered. The center of gravity of the forklift in the fore-and-aft direction approaches the front axle (50) as the mast (3) is tilted forward. Pivoting of the rear axle (13) is restricted by the hydraulic cylinder (17) when the height of the forks (5) is higher than a predetermined height determination value (HA) and the weight of a load on the forks (5) is heavier than a predetermined weight determination value (WA) to improve the vehicle's stability. The weight determination value (WA) increases as the mast (3) is tilted forward. When a load on the forks (5) is being unloaded, tilting of the rear axle (13) is permitted regardless of the height of the forks (5) and the weight of the load on the forks (5). Therefore, the rear axle (13) is not unnecessarily locked.
摘要:
An industrial vehicle has a frame (10a) and an axle (11) pivotally coupled with the frame (10a) by way of a pair of hydraulic cylinders (12). The cylinders (12) each have a hollow body (12a) that defines a hydraulic chamber (R) therein, a piston (12b) fitted in the chamber (R) and a piston rod (12c) that has a distal end located outside the body (12a) to engage an upper surface (11b) of the axle (11). The chamber (R) communicates with a hydraulic circuit (P) to regulate the cylinders (12). The piston rod (12c) has at its end a follower (17a; 21a; 22a) contacting the upper surface (11b) of the axle (11).
摘要:
A forklift (1) has a frame (4) and a rear axle (3), which is pivotally joined to the frame (4) about a center pivot axis. Front and rear supporting members support the frame on the axle. A damper (9) is located between the frame (4) and the axle (3). The damper (9) has an upper end connected to the frame (4) and a lower end connected to the axle (3). A bracket (25, 27) for joining the upper end of the damper to the frame is located no further forward than the front end of the front support member (22) and no further rearward than the rear support member (22). This structure suppresses torsion and bending force applied to the damper.
摘要:
An industrial vehicle has a body frame (1a) and an axle (10) pivotally supported by the body frame. The vehicle also includes a damper (13) located between the body frame and the axle. An passage supplies oil to the damper in accordance with tilting of the axle and receives oil discharged from the damper. A control valve (14) is located in the passage to control oil flow into and out of the damper. A tilt angle sensor detects the tilt angle of the axle. A controller controls the control valve in accordance with locking conditions for locking and unlocking the axle. When the locking conditions are not satisfied, the controller monitors whether the tilt angle of the axle detected by the tilt angle sensor exceeds a predetermined maximum tilt angle. The controller locks the axle if the tilt angle exceeds the maximum tilt angle, and thereafter unlocks the axle if the forces on the rear axle tend to decrease the tilt angle.