# US 12,603,545 B2 · Axially securing a shaft component of an electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,545 B2 - Document ID: US12603545B2 - Status: Granted - Kind: B2 - Application number: 18/265,005 - Filed: 2021-12-03 - Published: 2024-01-04 - Granted: 2026-04-14 - Earliest claimed: 2020-12-07 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Julian Umlandt - Web page: https://patentgrep.com/patent/US12603545B2 ## CPC - H02K 7/003: {Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28)} - H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures - H02K 15/02: of stator or rotor bodies - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A shaft system including a shaft having a peripheral groove extending in the circumferential direction, and further including a securing device as well as an interlocking connection by a deformation of the securing device into the groove. The securing device forms a first axial stop for a shaft component. The securing device includes a second axial stop. Also disclosed are an electric machine having the shaft system as well as a process for manufacturing the shaft system. ## Claims ### Claim 1 A shaft system, comprising: a shaft with a peripheral groove extending in a circumferential direction; a shaft component; a securing device; an interlocking connection formed by a deformation of the securing device into the groove; the securing device forms a first axial stop for the shaft component; and the securing device includes a second axial stop; wherein the peripheral groove includes a first peripheral groove extending in the circumferential direction and a second peripheral groove extending in the circumferential direction, the securing device includes a first securing device and a second securing device, each of which comprises the interlocking connection, the first stop and the second stop, the first securing device has the first interlocking connection to the first groove at a first location on the shaft, and the second securing device has the second interlocking connection to the second groove at a second location of the shaft, wherein the shaft component is arranged adjacent the first axial stop of the first securing device and a further shaft component is arranged between the second axial stop of the first securing device and the second axial stop of the second securing device; and wherein the shaft component and the further shaft component are on opposite axial sides of the first securing device. ### Claim 2 (depends on 1) The shaft system according to claim 1, wherein the securing device is tubular with a constant wall thickness in a region of the deformation. ### Claim 3 (depends on 1) The shaft system according to claim 1, wherein the interlocking connection comprises a plurality of radial deformations of the securing device into the groove that are distributed in the circumferential direction. ### Claim 4 (depends on 1) The shaft system according to claim 1, wherein the first securing device and the second securing device are identical components. ### Claim 5 (depends on 1) The shaft system according to claim 1, wherein the shaft component includes multiple parts. ### Claim 6 (depends on 1) The shaft system according to claim 1, wherein the shaft component is a rotor core of an electric machine comprising a first balancing disk and a first laminated core. ### Claim 7 (depends on 1) An electric machine comprising the shaft system according to claim 1. ### Claim 8 A shaft system, comprising: a shaft with a peripheral groove extending in a circumferential direction; a shaft component located on the shaft; a ring-shaped securing device; a radial deformation of the ring-shaped securing device into the groove forming an interlocking connection of the securing device to the shaft; the ring-shaped securing device forms a first axial stop for the shaft component; and the ring-shaped securing device includes a second axial stop, wherein the peripheral groove includes a first peripheral groove extending in the circumferential direction and a second peripheral groove extending in the circumferential direction, the securing device includes a first securing device and a second securing device, each of which comprises the radial deformation forming the interlocking connection, the first stop and the second stop, the first securing device has the radial deformation forming the first interlocking connection to the first groove at a first location on the shaft, and the second securing device has the radial deformation forming the second interlocking connection to the second groove at a second location of the shaft, wherein the shaft component is arranged between the first axial stop of the first securing device and the first axial stop of the second securing device, and a further shaft component is arranged between the second axial stop of the first securing device and the second axial stop of the second securing device; and wherein the shaft component and the further shaft component are on opposite axial sides of the first securing device. ### Claim 9 (depends on 8) The shaft system according to claim 8, wherein the ring-shaped securing device has a constant wall thickness in a region of the radial deformation. ### Claim 10 (depends on 8) The shaft system according to claim 8, wherein the radial deformation comprises a plurality of radial deformations that extend into the groove and are distributed in the circumferential direction. ### Claim 11 (depends on 8) The shaft system according to claim 8, wherein the first securing device and the second securing device are identical components. ### Claim 12 (depends on 8) The shaft system according to claim 8, wherein the shaft component includes multiple parts. ### Claim 13 (depends on 8) The shaft system according to claim 8, wherein the shaft component is a rotor core of an electric machine comprising a first balancing disk and a first laminated core.