The lifting platform with a hydraulic working device, as well as hydraulic working device

摘要

The invention relates to a working device (12) as well as a lifting platform (10), in particular a lowerable lifting platform, with a working device (12). The working means (12) has two mutually spaced telescopic lifting units (20, 120) which, jointly synchronously a load can raise and lower, wherein each of the lifting units (20, 120) at least one first telescopic stage (i) and a second telescopic stage (ii), wherein each of the lifting units (20, 120) further comprises a double-acting primary foundation for strength lifting cylinder (22, 122), a secondary foundation for strength lifting cylinder (26, 126), a double-acting primary load-side lifting cylinder (24, 124) and a secondary load-side lifting cylinder (28, 128), a working chamber (36, 136) of the primary foundation for strength lifting cylinder (22, 122) of the respective lifting unit (20, 120) hydraulically with a working space (50, 150) of the primary load-side lifting cylinder (24, 124) of the hoist unit (20, 120) is connectable, whereby an annular gap (38, 138) of the primary foundation for strength lifting cylinder (22, 122) of the respective lifting unit (20, 120) hydraulically with an annular space (52, 152) of the primary load-side lifting cylinder (24, 124) of the hoist unit (20, 120) is connectable, and wherein the working chamber (64, 164) of the secondary foundation for strength lifting cylinder (26, 126) of the respective lifting unit (20, 120) hydraulically to the working chamber (78, 178) of the secondary load lifting cylinder (28, 128) of the hoist unit (20, 120) is connectable.