Hydraulic steering
View Patent ↗The invention concerns a hydraulic steering ( 1 ) with a supply connection arrangement (P, T), a steering motor ( 2 ) and a steering unit ( 3 ) between the supply connection arrangement and the steering motor ( 2 ), the steering unit ( 3 ) having a directional section ( 4 ) and a measuring section ( 5 ), a steering valve ( 9 ) being arranged in parallel to the steering unit ( 3 ). With such a steering, it is endeavored to achieve the best possible safety. For this purpose, it is ensured that for each steering direction the directional section ( 4 ) comprises a first outlet (A 1 L, A 1 R), which is connected to the steering motor ( 2 ) by means of a first pipe ( 23, 24 ), and a second outlet (A 2 L, A 2 R), which is connected to the steering motor ( 2 ) by means of a second pipe ( 25, 26 ), the first outlet (A 1 L, A 1 R) being, in the neutral position of the directional section ( 4 ), connected to the measuring section ( 5 ), and the first pipe ( 23, 24 ) being interruptible by means of a valve arrangement ( 27, 27 a ).
1. A hydraulic steering with:
a supply connection arrangement;
a steering motor;
a steering unit between the supply connection arrangement and the steering motor, the steering unit having a directional section and a measuring section; and
a steering valve being arranged in parallel to the steering unit, wherein for each steering direction the directional section comprises a first outlet connected to the steering motor by means of a first pipe, and a second outlet directly connected to the steering motor at all times by means of a second pipe, the first outlet being in the neutral position of the directional section is connected to the measuring section, and the first pipe being interruptible by means of a valve arrangement.
2. The steering according to claim 1 , wherein the valve arrangement is made as a normally open valve arrangement.
3. A hydraulic steering with:
a supply connection arrangement;
a steering motor;
a steering unit between the supply connection arrangement and the steering motor, the steering unit having a directional section and a measuring section; and
a steering valve being arranged in parallel to the steering unit, wherein for each steering direction the directional section comprises a first outlet connected to the steering motor by means of a first pipe, and a second outlet connected to the steering motor by means of a second pipe, the first outlet being in the neutral position of the directional section is connected to the measuring section, and the first pipe being interruptible by means of a valve arrangement;
wherein the valve arrangement is activated by a signal that activates the steering valve.
4. The steering according to claim 1 , wherein the valve arrangement is hydraulically activated.
5. The steering according to claim 1 , wherein during activation the two outlets of the directional section are connected to the inlet that is connected to the measuring section.
6. A hydraulic steering comprising:
a supply connection arrangement;
a steering motor;
a steering unit between the supply connection arrangement and the steering motor, the steering unit having a directional section and a measuring section; and
a steering valve being arranged in parallel to the steering unit, wherein for each steering direction the directional section comprises a first outlet connected to the steering motor by means of a first pipe, and a second outlet connected to the steering motor by means of a second pipe, the first outlet being in the neutral position of the directional section is connected to the measuring section, and the first pipe being interruptible by means of a valve arrangement, wherein the steering valve is connectable to the steering motor via the valve arrangement.
7. A hydraulic steering comprising:
a supply connection arrangement;
a steering motor;
a steering unit between the supply connection arrangement and the steering motor, the steering unit having a directional section and a measuring section; and
a steering valve being arranged in parallel to the steering unit, wherein for each steering direction the directional section comprises a first outlet connected to the steering motor by means of a first pipe, and a second outlet connected to the steering motor by means of a second pipe, the first outlet being in the neutral position of the directional section is connected to the measuring section, and the first pipe being interruptible by means of a valve arrangement, wherein the valve arrangement connects a load-sensing pipe to a low-pressure connection, when the first pipe is open.
8. A hydraulic steering with:
a supply connection arrangement;
a steering motor;
a steering unit between the supply connection arrangement and the steering motor, the steering unit having a directional section and a measuring section; and
a steering valve being arranged in parallel to the steering unit, wherein for each steering direction the directional section comprises a first outlet connected to the steering motor by means of a first pipe, and a second outlet connected to the steering motor by means of a second pipe, the first outlet being in the neutral position of the directional section is connected to the measuring section, and the first pipe being interruptible by means of a valve arrangement;
wherein the valve arrangement has one first valve, which releases or interrupts the first pipe, and a second valve, which releases or interrupts a supply to the steering valve.
9. The steering according to claim 8 , wherein the first valve and the second valve have a common activation signal and an opposite interruption behaviour.
10. The steering according to claim 1 , wherein the first pipe is interrupted by a common valve arrangement.
11. The steering according to claim 6 , wherein the valve arrangement is made as a normally open valve arrangement.
12. The steering according to claim 6 , wherein the valve arrangement is activated by a signal that activates the steering valve.
13. The steering according to claim 6 , wherein the valve arrangement is hydraulically activated.
14. The steering according to claim 6 , wherein during activation the two outlets of the directional section are connected to the inlet that is connected to the measuring section.
15. The steering according to claim 6 , wherein the valve arrangement connects a load-sensing pipe to a low-pressure connection, when the first pipe is open.
16. The steering according to claim 6 , wherein the valve arrangement has one first valve, which releases or interrupts the first pipe, and a second valve, which releases or interrupts a supply to the steering valve.
17. The steering according to claim 16 , wherein the first valve and the second valve have a common activation signal and an opposite interruption behaviour.
18. The steering according to claim 6 , wherein the first pipe is interrupted by a common valve arrangement.