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US 2022/0120296 A1Published application
Method for manufacturing a piston rod unit and a hollow shaft
AssigneeLiebherr-Components Kirchdorf GmbH
InventorsChristoph GUHL, Bernhard MÜLLER
Life of this patent
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Abstract
A piston rod unit and a method for producing a piston rod unit, or a shaft, in light-weight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
Claims14
-9. (canceled)
A piston rod unit comprising:
- a piston rod with a rod shank, wherein the rod shank comprises a deep bore, and
- a piston, wherein the piston rod is form-fittingly connected with the piston exclusively via an external connection type;
- wherein, the deep bore is formed by deep-hole drilling the rod shank and during drilling, a material excess is left at a rod end of the piston rod;
- and
- wherein the rod end of the piston rod having the material excess has a greater thickness than an immediately adjacent section of the piston rod.
2 more elements
(canceled)
A mining apparatus, with at least one piston rod unit, wherein a piston rod of the piston rod unit is hollow.
Dependencies are inferred from the claim text.