Pressure-compensated, directly controlled valve
AssigneeRobert Bosch GmbH
InventorAndreaś Dutt
Life of this patent
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Abstract
The invention relates to a valve for high-pressure hydraulics, having a valve bore provided in a valve housing in which bore at least one valve seat dividing a guide on the high-pressure side of the valve bore from a guide on the low-pressure side of the valve bore and a valve needle actuatable directly by an actuator which needle is guided in the valve bore and has at least one sealing face which can cooperate with the at least one valve seat in which the valve needle is constructed in multiple parts and, in the region of the guide on the low-pressure side, has at least one sleeve.
Claims19
In a valve for high-pressure hydraulics, comprising
- a valve bore (3), provided in a valve housing (2), in which bore at least one valve seat (5;
- 19;
- 23) is embodied that divides a guide (8) on the high-pressure side of the valve bore (3) from a guide (12) on the low-pressure side of the valve bore (3), and a valve needle (1) actuatable directly by an actuator (4), which needle is guided in the valve bore (3) and has at least one sealing face (9;
- 28), which can cooperate with the at least one valve seat (5;
- 19;
- 23), the improvement wherein the valve needle (1) is constructed in multiple parts and, in the region of the guide (12) on the low-pressure side, has at least one sleeve (13;
- 21, 22;
- 24, 25), wherein the at least one sleeve (13;
- 21, 22;
- 24, 25) is axially braced at one end, and further comprising a chamfer (17) on an end of the at least one sleeve (13;
- 21, 22;
- 24, 25) which is disposed opposite to the one end, and a snap ring (16) disposed in the chamfer (17) and in a groove on the valve needle (1).
In a valve for high-pressure hydraulics, comprising
- a valve bore (3), provided in a valve housing (2), in which bore at least one valve seat (5;
- 19;
- 23) is embodied that divides a guide (8) on the high-pressure side of the valve bore (3) from a guide (12) on the low-pressure side of the valve bore (3), and a valve needle (1) actuatable directly by an actuator (4), which needle is guided in the valve bore (3) and has at least one sealing face (9;
- 28), which can cooperate with the at least one valve seat (5;
- 19;
- 23), the improvement wherein the valve needle (1) is constructed in multiple parts and, in the region of the guide (12) on the low-pressure side, has at least one sleeve (13;
- 21, 22;
- 24, 25), wherein the at least one sleeve (13;
- 21, 22;
- 24, 25) is axially braced on a shoulder by means of an elastic element (15), and further comprising a chamfer (17) on the at least one sleeve (13;
- 21, 22;
- 24, 25) opposite the elastic element (15), and a snap ring (16) disposed in the chamfer (17) and in a groove on the valve needle (1).
Dependencies are inferred from the claim text.