The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5') and whose absorption volume can be regulated by means of
The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5') and whose absorption volume can be regulated by means of a regulator (40, 41). One respective hydraulic motor (6, 25) for a drive train is provided per respective right or left vehicle side. The regulators ( 40, 41) are actuated by a respective regulator piston (7, 26). The regulator pistons (7, 26) of both hydraulic motors (6, 25) can be subjected to a force by means of a common high pressure, which equals the highest pressure that prevails in the service lines ( 4, 41, 5, 5') of both hydraulic motors (6, 25). Each force is opposed to a respective counter-force, which is generated by a control pressure in a control pressure chamber (11, 11'). The pressure in the control pressure chamber (11)/(11') of the first and second regulator pistons (7)/(27) of the first and second hydraulic motors (6)/(25) can be reduced by means of first and second pressure regulating valves (17)/(30) in relation to a tank (20) and the first and second pressure regulating valves (17)/(30) are impinged by the respectively higher pressure of the first and second service lines (4, 5)/(4', 5') that are allocated to the first and second hydraulic motors (6)/( 20), in the form of a controlled variable.
대표청구항▼
The invention claimed is: 1. Hydrostatic drive having at least one hydraulic pump ( 1) and a first and a second hydraulic motor (6, 25), 5 which are each connected by two working lines (4, 4', 5, 5') to the hydraulic pump (1) and the absorption volume of which is adjustable in each case by means o
The invention claimed is: 1. Hydrostatic drive having at least one hydraulic pump ( 1) and a first and a second hydraulic motor (6, 25), 5 which are each connected by two working lines (4, 4', 5, 5') to the hydraulic pump (1) and the absorption volume of which is adjustable in each case by means of an adjusting device (40, 41), wherein in each case one hydraulic motor (6, 25) is provided for a drive train for in each case a right or a left vehicle side, characterized in that the adjusting devices (40, 41) are actuable in each case by means of an adjusting piston (7, 26 ), wherein the adjusting pistons (7, 26) of both hydraulic motors (6, 25) are loadable with a force by means of a common high pressure and the common high pressure is equal to the highest working pressure prevailing in the working lines (4, 4', 5, 5') of both hydraulic motors (6, 25), and the force is counteracted in each case by a counterforce, which is generated by an actuating pressure in an actuating pressure chamber (11, 11'), and that the actuating pressure chamber (11) of the first adjusting piston (7) of the first hydraulic motor (6) is relievable through a first pressure regulating valve (17) towards a tank (20) and the first pressure regulating valve (17) is loaded with the in each case higher pressure of the working lines ( 4, 5) associated with the first hydraulic motor (6) as a controlled variable and the actuating pressure chamber (11') of the second adjusting piston (27) of the second hydraulic motor ( 25) is relievable through a second pressure regulating valve ( 30) towards the tank (20) and the second pressure regulating valve (30) is loaded with the in each case higher pressure of the working lines (4', 5') associated with the second hydraulic motor (25) as a controlled variable, and wherein the pressure regulating valves (17, 30) in their initial position establish a connection, through which flow is possible in both directions, of in each case one control pressure valve (19, 29) to in each case on actuating pressure chamber (11, 11'). 2. Hydrostatic drive according to claim 1, characterized in that the pressure regulating valves (17, 30) are designed as spring-loaded, infinitely variable 3/2-way valves. 3. Hydrostatic piston machine according to claim 1, characterized in that, for loading the first and/or second pressure regulating valve (17; 30) with the in each case higher pressure of the working lines (4, 5; 4', 5') of the first and/or second hydraulic motor (6; 25), the first and/or second pressure regulating valve (17, 30) is connected to the working lines (4, 5; 4', 5') of the first and/or second hydraulic motor (6; 25) in each case by a check valve (23a, 23b, 23a', 23b') opening in the direction of the pressure regulating valves (17, 30). 4. Hydrostatic piston machine according to claim 3, characterized in that formed parallel to the check valves (23a, 23b, 23a', 23b') there is in each case a line having a throttling device (24a, 24 b, 24a', 24b'). 5. Hydrostatic drive having at least one hydraulic pump ( 1) and a first and a second hydraulic motor (6, 25), 5 which are each connected by two working lines (4, 4', 5, 5') to the hydraulic pump (1) and the absorption volume of which is adjustable in each case by means of an adjusting device (40, 41), wherein in each case one hydraulic motor (6, 25) is provided for a drive train for in each case a right or a left vehicle side, characterized in that the adjusting devices (40, 41) are actuable in each case by means of an adjusting piston (7, 26 ), wherein the adjusting pistons (7, 26) of both hydraulic motors (6, 25) are loadable with a force by means of a common high pressure and the common high pressure is equal to the highest working pressure prevailing in the working lines (4, 4', 5, 5') of both hydraulic motors (6, 25), and the force is counteracted in each case by a counterforce, which is generated by an actuating pressure in an actuating pressure chamber (11, 11 '), and that the actuating pressure chamber (11) of the first adjusting piston (7) of the first hydraulic motor (6) is relievable through a first pressure regulating valve (17) towards a tank (20) and the first pressure regulating valve (17) is loaded with the in each case higher pressure of the working lines ( 4, 5) associated with the first hydraulic motor (6) as a controlled variable and the actuating pressure chamber (11') of the second adjusting piston (27) of the second hydraulic motor ( 25) is relievable through a second pressure regulating valve ( 30) towards the tank (20) and the second pressure regulating valve (30) is loaded with the in each case higher pressure of the working lines (4', 5') associated with the second hydraulic motor (25) as a controlled variable, and wherein the actuating pressures are adjustable in each case by means of a control pressure valve (19; 29). 6. Hydrostatic piston machine according to claim 5, characterized in that the setting of the pressure of the control valve ( 19;29) arises as an equilibrium of forces between a measuring area loaded with a control pressure and at least one oppositely acting compression spring, the spring force of which is fed back by the adjusting piston (7; 26).
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이 특허에 인용된 특허 (7)
Ikari, Masanori; Matsuyama, Nobuo, Apparatus for controlling a plurality of hydraulic motors and clutch.
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