# US 12,000,440 B2 · Torsionally elastic shaft joint and method of making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,440 B2 - Document ID: US12000440B2 - Status: Granted - Kind: B2 - Application number: 17/348,800 - Filed: 2021-06-16 - Published: 2021-12-23 - Granted: 2024-06-04 - Earliest claimed: 2020-06-17 - Assignees: IFA-Technologies GmbH - Applicants: IFA-Technologies GmbH - Inventors: David Schmicker; Paul Geppert - Web page: https://patentgrep.com/patent/US12000440B2 ## CPC - F16D 3/62: the links or their attachments being elastic - F16D 3/78: shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A torsion-elastic cardan joint for connecting a shaft with a second component that is not continuously coaxial during torque transmission, which comprises a torsion-elastic power transmission system, a flange connected to this in a torque-proof manner, and a second flange connected to this in a torque-proof manner on the opposite end face of the torsion-elastic power transmission system. The shaft-side flange is coaxially connected to the shaft and the second flange is coaxially connected to the second component in a torque-proof manner. The shaft-side flange consists of a dimensionally stable disk-shaped flange part (1, 10, 12). The shaft is directly connected to this disk-shaped flange part (1, 10, 12) in a torque-proof manner, for example, via friction welding. As a result, there is no need to adapt the shaft-side flange to the dimensions of the shaft. ## Claims ### Claim 1 A torsion-elastic cardan coupling for connecting a shaft with a second component that is not continuously coaxial during torque transmission, which comprises a torsion-elastic power transmission system, a shaft-side flange connected to this in a torque-proof manner, and a second flange connected to this in a torque-proof manner on the opposite end face of the torsion-elastic power transmission system, wherein the shaft-side flange is connected to the shaft, the second flange is coaxially connected to the second component in a torque-proof manner, and the shaft-side flange is comprised of a disk-shaped semi-finished product (1, 10, 12), characterized in that, the shaft is directly connected to this disk-shaped semi-finished product (1, 10, 12) in a torque-proof manner, without any adaptation for the dimensions of the shaft or any attachment being required to join the shaft to the disk-shaped semi-finished product (1, 10, 12). ### Claim 2 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that the disk-shaped semi-finished product is a star flange (10), a triangle flange or arm flange. ### Claim 3 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that the sheet metal semi-finished product comprises reinforcing beads (13). ### Claim 4 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that the sheet metal semi-finished product has a U-shaped cross-sectional profile. ### Claim 5 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that, in the disk-shaped semi-finished product, a coaxial groove is introduced on the shaft side, in which a pipe piece (2) of a shaft is inserted. ### Claim 6 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that the disk-shaped semi-finished product has a flat coaxial bulge (7), on which the shaft is fixed to rotation or in which the shaft is inserted in a torque-proof manner. ### Claim 7 (depends on 1) The torsion-elastic cardan coupling according to claim 1, characterized in that the disk-shaped semi-finished product (1, 10, 12) comprises a central drill hole. ### Claim 8 (depends on 7) The torsion-elastic cardan coupling according to claim 7, characterized in that the central drill hole has a coaxial sleeve-like deep draw (9) in the direction of the torsion-elastic power transmission system. ### Claim 9 (depends on 1) The torsion-elastic cardan coupling according to claim 1, wherein the torsion-elastic power transmission (3) is a flexible joint disk. ### Claim 10 A method for producing a torsion-elastic cardan coupling for connecting a shaft with a second component that is not continuously coaxial during torque transmission, which has a torsion-elastic power transmission system, a shaft-side flange connected to this in a torque-proof manner and a second flange connected to this in a torque-proof manner on the opposite end face of the torsion-elastic power transmission system, wherein the shaft-side flange is connected to the shaft, and the second flange is coaxially connected to the second component in a torque-proof manner, and the shaft-side flange is comprised of a disk-shaped semi-finished product (1, 10, 12), characterized in that, the shaft is connected directly to this disk-shaped semi-finished product (1, 10, 12) in a torque-proof manner, without a connection attachment adapted to the shaft being required to join the shaft to the disk-shaped semi-finished product (1, 10, 12). ### Claim 11 (depends on 10) The method according to claim 10, characterized in that the shaft is connected to the disk-shaped semi-finished product by means of friction welding.