Hydrostatic traveling mechanism

Hydrostatic drive (1) having

• at least one hydraulic pump (4),
• a first hydraulic motor (8) which is connected to the hydraulic pump (4) via a hydraulic working circuit (2) and drives a first drive train (17),
• a second hydraulic motor (10) which is connected via the hydraulic working circuit (2) to the hydraulic pump (4) and drives a second drive train (19),
• a third hydraulic motor (23) coupled to the first drive train (17),
• a fourth hydraulic motor (24) coupled to the second drive train (19),
• a hydraulic secondary circuit (3) with a first secondary line (26) connecting a first connection (25) of the third hydraulic motor (23) to a first connection (27) of the fourth hydraulic motor (24) and a second secondary line (29) connecting a second connection (28) of the fourth hydraulic motor (24) to a second connection (30) of the third hydraulic motor (23),
• characterised in that the first secondary line (26) and the second secondary line (29) of the hydraulic secondary circuit (3) are in closed loop configuration, whereby one of said first and second lines has a braking pressure in the case of a slip of the first drive train (17) or of the second drive train (19).

Hydrostatic drive (1) having

• at least one hydraulic pump (4),
• a first hydraulic motor (8) which is connected to the hydraulic pump (4) via a hydraulic working circuit (2) and drives a first drive train (17),
• a second hydraulic motor (10) which is connected via the hydraulic working circuit (2) to the hydraulic pump (4) and drives a second drive train (19),
• a third hydraulic motor (23) coupled to the first drive train (17),
• a fourth hydraulic motor (24) coupled to the second drive train (19), characterised in that the fourth hydraulic motor (24) is connectable to the third hydraulic motor (23) via a hydraulic secondary circuit (3) independent of the working circuit (2), and a fifth hydraulic motor (72) being provided which is connected to the hydraulic pump (4) via the hydraulic working circuit (2) and drives a third drive train (71) and a sixth hydraulic motor (73) being provided coupled to the third the drive train (71) the sixth hydraulic motor (73) being connectable to the third hydraulic motor (24) via the hydraulic secondary circuit (3).

Hydrostatic drive (1) having

• at least one hydraulic pump (4),
• a first hydraulic motor (8) which is connected to the hydraulic pump (4) via a hydraulic working circuit (2) and drives a first drive train (17),
• a second hydraulic motor (10) which is connected via the hydraulic working circuit (2) to the hydraulic pump (4) and drives a second drive train (19),
• a third hydraulic motor (23) coupled to the first drive train (17),
• a fourth hydraulic motor (24) coupled to the second drive train (19),
• characterised in that the fourth hydraulic motor (24) is connectable to the third hydraulic motor (23) via a hydraulic secondary circuit (3) independent of the working circuit (2), the secondary circuit (3) being connected to a feed line (33) for feeding hydraulic fluid, and a low pressure-carrying secondary line (26;
• 29) of the secondary circuit (3) is connected via a nonreturn valve (39;
• 40) to the feed line (33) or the switching valve (50).