# US 11,306,623 B2 · System consisting of a camshaft and a camshaft sleeve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,623 B2 - Document ID: US11306623B2 - Status: Granted - Kind: B2 - Application number: 16/301,507 - Filed: 2017-05-19 - Published: 2019-09-26 - Granted: 2022-04-19 - Earliest claimed: 2016-05-23 - Assignees: Thyssenkrupp Presta Teccenter AG; thyssenkrupp AG - Applicants: Thyssenkrupp Presta Teccenter AG; thyssenkrupp AG - Inventors: Volker Junge; Falk Heitling - Web page: https://patentgrep.com/patent/US11306623B2 ## CPC - F01L 1/047: Camshafts - F16D 1/10: Quick-acting couplings in which the parts are connected by simply bringing them together axially - F16D 1/104: having retaining means rotating with the coupling and acting only by friction - F16D 1/108: having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling - F16H 53/025: {characterised by their construction, e.g. assembling or manufacturing features} - F01L 2001/0473: {Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod} - F16D 2001/103: {the torque is transmitted via splined connections} - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING ## Abstract A system including a camshaft and a camshaft sleeve. The camshaft sleeve has a sleeve-shaped main body for receiving an end region of the cam-shaft. The main body includes a joining region, a bearing region and a seat region. The main body and the camshaft are configured in such a way that, in the mounted state, the cam-shaft is joined in the joining region to the camshaft sleeve, the system having, in the bearing region, a clearance between the camshaft and the camshaft sleeve, and the camshaft and the camshaft sleeve are connected to one another in the seat region via a positively locking means and/or a frictionally lock, in particular a toothing system. ## Claims ### Claim 1 A system, comprising: a camshaft including an end region, and a camshaft sleeve including a main body configured to receive the end region, the main body comprising a joining region, a bearing region, and a seat region, with the joining region being disposed axially closer to a distal end of the camshaft where the end region is located than the bearing region and the seat region, wherein the main body and the camshaft are configured such that, in a mounted state, the camshaft is joined in the joining region to the camshaft sleeve, wherein the system has, in the bearing region, a clearance between the camshaft and the camshaft sleeve, and the camshaft and the camshaft sleeve are connected to one another in the seat region via at least one positive lock or a frictional lock. ### Claim 2 (depends on 1) The system of claim 1, wherein the at least one positive lock or the frictional lock that connects the camshaft and the camshaft sleeve is a toothing system. ### Claim 3 (depends on 1) The system of claim 1, wherein the bearing region is arranged axially between the joining region and the seat region. ### Claim 4 (depends on 1) The system of claim 1, wherein the main body has, in the bearing region, a cylindrical cavity, a diameter of which is greater than an external diameter of the end region of the camshaft which is arranged within the bearing region in the mounted state. ### Claim 5 (depends on 1) The system of claim 1, wherein the camshaft has a toothing system in a section which is provided for the seat region in the mounted state, wherein the toothing system of the camshaft constitutes at least part of the at least one positive lock or the frictional lock that connects the camshaft and the camshaft sleeve. ### Claim 6 (depends on 5) The system of claim 5, the toothing system of the camshaft engaging, in the mounted state, into an internal toothing system of the camshaft sleeve in the seat region of the main body, wherein the internal toothing system of the camshaft sleeve constitutes at least part of the at least one positive lock or the frictional lock that connects the camshaft and the camshaft sleeve. ### Claim 7 (depends on 6) The system of claim 6, the toothing system and the internal toothing system in the seat region having an overlap. ### Claim 8 (depends on 1) The system of claim 1, wherein the camshaft sleeve comprises a sinter-hardened component. ### Claim 9 (depends on 1) A method for assembling the system of claim 1, comprising: introducing the camshaft end region into the main body, orienting the camshaft by way of the at least one positive lock or the frictional lock in the seat region, and joining the distal end of the end region and the camshaft to the main body in the joining region. ### Claim 10 (depends on 1) The system of claim 1 wherein the joining region is disposed at the distal end of the end region of the camshaft. ### Claim 11 (depends on 1) The system of claim 1 wherein in the mounted state the camshaft is axially fixed in the joining region to the camshaft sleeve. ### Claim 12 (depends on 1) The system of claim 1 wherein the camshaft sleeve comprises a collar that projects radially outwards, wherein the distal end of the camshaft is disposed at an axial location that coincides with the collar. ### Claim 13 (depends on 1) The system of claim 1 wherein a radially most narrow portion of the camshaft sleeve is disposed at the joining region. ### Claim 14 (depends on 1) The system of claim 1 wherein the camshaft sleeve protrudes axially relative to the camshaft. ### Claim 15 (depends on 1) The system of claim 1 wherein an entirety of a transition between an inner diameter of the camshaft sleeve at the joining region and an inner diameter of the camshaft sleeve at the bearing region is oblique relative to a longitudinal axis of the camshaft. ### Claim 16 (depends on 1) The system of claim 1 wherein the end region of the camshaft is disposed in a blind hole of the camshaft sleeve.