The invention relates to a power steering system (2) for a working machine (4), comprising: at least one steering cylinder (10) comprising two compartments separated by a piston (11); a liquid tank (12); a steering unit (14) comprising a steering valve (16) and a metering device (18) for supplying a metered flow of liquid to one compartment of the steering cylinder; a hydraulic pump (22) to pump liquid from the liquid tank through a supply line (24) to the steering unit; a return line (26) through which the liquid can flow from the diverting unit back to the liquid tank; a recirculation line (28) connecting the return line to the supply line, on which a check valve (44) is arranged to prevent liquid from flowing from the supply line to the return line; two control lines (30, 32) respectively connecting the steering unit to the two compartments of the steering cylinder; and a liquid accumulator (34) which is connected to the return line (26) by means of a branch (35). A pressure relief valve (36) is arranged on the return line (26) between the liquid tank (12) and the connection point (38) of the energy accumulator (34).
本发明涉及一种用于作业机器(4)的动力转向系统(2),所述动力转向系统包括:至少一个转向缸(10),其包括被活塞(11)分离的两个隔室;液体箱(12);转向单元(14),其包括转向阀(16)和计量装置(18),用以向转向缸的一个隔室供应经计量的液体流;液压泵(22),用以将液体从液体箱通过供应管线(24)泵送到转向单元;返回管线(26),所述液体可以从转向单元通过返回管线流回液体箱;再循环管线(28),所述再循环管线将返回管线连接到供应管线,在再循环管线上布置有止回阀(44)以防止液体从供应管线流动到返回管线;两条控制管线(30、32),分别将转向单元连接到转向缸的所述两个隔室;以及液体蓄能器(34),所述液体蓄能器通过支路(35)连接到返回管线(26)。泄压阀(36)在返回管线(26)上被布置在液体箱(12)与蓄能器(34)的连接点(38)之间。
POWER STEERING SYSTEM FOR WORK MACHINE
用于作业机器的动力转向系统
2023-01-31
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
Steering system, steering method, electronic apparatus, and work machine
European Patent Office | 2023
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