Working cylinder
AssigneeBuemach Engineering International B.V.
InventorJosef Bueter
Life of this patent
Estimating the term…
Abstract
A cylinder includes a cylinder tube, a first closure part, a second closure part, and a piston unit. The cylinder tube has a first tube end and a second tube end. The tube and end closure parts define a cylinder interior. The piston unit defines at least one working space in the cylinder interior. The first closure part is connected to the tube by a first peripheral laser ring weld and the second closure part is connected to the tube by a second peripheral laser ring weld. The laser ring welds each define a fluid-tight sealing plane. A peripheral sealing ring is located between each closure part and a tube inner wall at an axial distance from the associated laser ring weld seam. The peripheral sealing ring defines a pressure-separated ring section between the peripheral sealing ring and the associated laser ring weld seam.
Claims6
A working cylinder, comprising:
- a cylinder tube, a first closure part, a second closure part and a piston unit;
- said cylinder tube having a first cylinder tube end and a second cylinder tube end;
- said first closure part being arranged at the first cylinder tube end and said second closure part being arranged at said second cylinder tube end, said cylinder tube and said first and second closure parts define a cylinder interior;
- said piston unit defining at least one working chamber in said cylinder interior, said piston unit slidably passing through the first closure part;
- said first closure part being joined to the cylinder tube in a positive-locking manner by a first circumferential laser ring weld seam, said second closure part being joined to the cylinder tube in a positive-locking manner by a second circumferential laser ring weld seam, and each of the laser ring weld seams defining a fluid-tight sealing plane, each of the laser ring weld seams having a ring weld seam depth, said ring weld seam depth having a ratio of 1.1 to 2.5 relative to a cylinder tube wall thickness;
- a first circumferential sealing ring being arranged axially spaced from said first laser ring weld seam in said cylinder interior between said first closure part and a cylinder tube inner wall of said cylinder tube at said first cylinder tube end, said sealing ring defining a first pressure-separated annular section between said first circumferential sealing ring and said first laser ring weld seam, and/or a second circumferential sealing ring being arranged at an axial distance from the second laser ring weld seam in the cylinder interior between the second closure part and said cylinder tube inner wall at said second cylinder tube end, and said second circumferential sealing ring defining a second pressure-separated annular section arranged between said second circumferential sealing ring and said second laser ring weld seam.
A working cylinder, comprising:
- a cylinder tube, a first closure part, a second closure part and a piston unit;
- said cylinder tube having a first cylinder tube end and a second cylinder tube end;
- said first closure part being arranged at the first cylinder tube end and said second closure part being arranged at said second cylinder tube end, said cylinder tube and said first and second closure parts define a cylinder interior;
- said piston unit defining at least one working chamber in said cylinder interior, said piston unit slidably passing through the first closure part;
- said first closure part being joined to the cylinder tube in a positive-locking manner by a first circumferential laser ring weld seam, said second closure part being joined to the cylinder tube in a positive-locking manner by a second circumferential laser ring weld seam, and each of the laser ring weld seams defining a fluid-tight sealing plane;
- a first circumferential sealing ring being arranged axially spaced from said first laser ring weld seam in said cylinder interior between said first closure part and a cylinder tube inner wall of said cylinder tube at said first cylinder tube end, said sealing ring defining a first pressure-separated annular section between said first circumferential sealing ring and said first laser ring weld seam, and/or a second circumferential sealing ring being arranged at an axial distance from the second laser ring weld seam in the cylinder interior between the second closure part and said cylinder tube inner wall at said second cylinder tube end, and said second circumferential sealing ring defining a second pressure-separated annular section arranged between said second circumferential sealing ring and said second laser ring weld seam;
- and
- at least one closure part having an axially opening, circumferential concave receiving contour in which the cylinder tube engages, said receiving contour radially overlapping the cylinder tube, and in that a ring weld seam inclination angle alpha is 110 to 160 degrees.
Dependencies are inferred from the claim text.