Bushing for a hydraulic valve
View Patent ↗A bushing for a hydraulic valve has a bushing wall having openings allowing passage of a hydraulic medium to and from an interior of the bushing. The openings have an opening wall that at least across a portion of a circumference of the opening wall is formed as a molded bevel. The molded bevel is positioned at an acute angle to a radial plane of the bushing wall. The bushing wall has outer annular channels and the openings open into the outer annular channels, respectively.
1. A bushing for a hydraulic valve, the bushing comprising:
a bushing wall defining an interior of the bushing;
the bushing wall having openings allowing passage of a hydraulic medium to and from the interior;
wherein the openings have an opening wall that at least across a portion of a circumference of the opening wall is formed as a molded bevel;
wherein several of the openings are arranged adjacent one another in a circumferential direction of the bushing;
wherein the openings arranged adjacent one another in the circumferential direction, viewed in a cross-section of the bushing, have a first wall portion extending substantially radially and a second wall portion opposite the first wall portion, wherein the second wall portion is part of the molded bevel;
wherein two of the openings neighboring one another in the circumferential direction are arranged such that the molded bevels are neighboring one another;
wherein the molded bevels facing one another are positioned at an acute angle to a radial plane of the bushing wall, which radial plane is positioned centrally between the molded bevels neighboring one another;
wherein the acute angle opens radially inwardly toward the interior.
2. The bushing according to claim 1 , wherein the bushing wall has outer annular channels and wherein the openings open into the outer annular channels, respectively.
3. The bushing according to claim 2 , wherein the interior of the bushing wall has an inner wall provided with inner annular channels.
4. The bushing according to claim 3 , wherein the inner annular channels and the outer annular channels are connected with one another by the openings.
5. The bushing according to claim 4 , wherein the outer annular channels and the inner annular channels are separated from one another by annular webs, respectively.
6. The bushing according to claim 5 , wherein the annular webs separating the inner annular channels have identical inner diameter.
7. The bushing according to claim 1 formed as a diecast part.
8. The bushing according to claim 7 formed as a light metal diecast part.
9. The bushing according to claim 1 formed as an injection molded part.
10. The bushing according to claim 9 , wherein the bushing is an injection molded plastic part.
11. The bushing according to claim 1 , wherein at least some of the openings are provided with at least one fine control opening.
12. The bushing according to claim 1 , wherein the at least one fine control opening is formed by a recess in the opening wall.
13. The bushing according to claim 1 , wherein the interior of the bushing wall has a constant inner diameter.