# US 10,371,217 B2 · Starter freewheel and freewheel arrangement having a starter freewheel of this kind > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,217 B2 - Document ID: US10371217B2 - Status: Granted - Kind: B2 - Application number: 15/481,646 - Filed: 2017-04-07 - Published: 2017-07-27 - Granted: 2019-08-06 - Earliest claimed: 2013-12-05 - Assignees: BorgWarner Inc. - Applicants: BorgWarner Inc. - Inventors: Jochen Boelling; Dirk Achim Schmitt; Richard Baeumier - Web page: https://patentgrep.com/patent/US10371217B2 ## CPC - F16D 41/06: with intermediate wedging coupling members between an inner and an outer surface (F16D41/02, F16D41/24 take precedence) - F02N 15/023: {of the overrunning type} - F16D 41/064: the intermediate members wedging by rolling and having a circular cross-section, e.g. balls (F16D41/061 takes precedence) - F16D 41/066: all members having the same size and only one of the two surfaces being cylindrical - F16F 15/00: Suppression of vibrations in systems ({damping of non-rotary systems using inertia effect F16F7/10; prevention or isolation of vibrations in machine tools B23Q11/0032; suppression of driveline vibrations in hybrid vehicle transmissions B60W30/20} ; vehicle seat suspension devices B60N2/50; {methods or devices for protecting against, or damping of, acoustic waves, e.g. sound G10K11/16}); Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion ({vibration absorbing or balancing means for aircraft propellers B64C11/008, for rotorcraft rotors B64C27/001} ; testing static and dynamic balance of machines or structures G01M1/00) - F16F 15/124: Elastomeric springs (F16F15/123, {F16F15/127} take precedence) - F16D 41/069: the intermediate members wedging by pivoting or rocking, e.g. sprags (F16D41/061 takes precedence) - F16D 41/07: between two cylindrical surfaces - F16D 2041/0605: {Spring details} - F16D 2041/0665: {characterised by there being no cage other than the inner and outer race for distributing the intermediate members} - F16D 2300/22: Vibration damping - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A starter freewheel is provided. The starter freewheel has a first race, a second race, a wedging gap formed between the first and second races, at least one wedging element arranged in the wedging gap, and at least one further component. The further component is in rotary drive connection with one of the races. The component is formed by at least two sheet-metal parts connected to one another in sandwich-fashion. A freewheel arrangement having a starter freewheel of this kind is also provided. ## Claims ### Claim 1 A freewheel arrangement for a drive train having a starter freewheel wherein the starter freewheel is a dry-running freewheel having a first race, and a second race, wherein the second race is in rotary drive connection with an output side of a starter and is supported on an output side of a driving unit on a fixed housing via a radial bearing arranged between the second race and a supporting part secured on the fixed housing, the freewheel arrangement further having a flexplate to transmit torque between the output side of the driving unit and the first race, wherein the flexplate includes a first sheet-metal part and a second sheet-metal part connected to one another in such a way that torque can be transmitted via just one of the two sheet-metal parts. ### Claim 2 (depends on 1) The freewheel arrangement as claimed in claim 1 wherein the flexplate includes a first sheet-metal part and a second sheet-metal part connected to one another nonpositively, positively, or a combination of nonpositively and positively. ### Claim 3 (depends on 2) The freewheel arrangement as claimed in claim 2 wherein the sheet-metal parts are connected by at least one of screwing, riveting, welding, or adhesive bonding. ### Claim 4 (depends on 2) The freewheel arrangement as claimed in claim 2 wherein the sheet-metal parts are connected to one another with a damping layer placed in between, wherein the damping layer is softer and/or more flexible than the sheet-metal parts. ### Claim 5 (depends on 4) The freewheel arrangement as claimed in claim 4 wherein the damping layer is formed from a viscoelastic and/or nonmetallic material. ### Claim 6 (depends on 4) The freewheel arrangement as claimed in claim 4 wherein the damping layer is adhesively bonded to at least one of the sheet-metal parts. ### Claim 7 (depends on 4) The freewheel arrangement as claimed in claim 4 wherein the damping layer is vulcanized to at least one of the sheet-metal parts. ### Claim 8 (depends on 4) The freewheel arrangement as claimed in claim 4 wherein the damping layer is clamped between the sheet-metal parts as a damping layer separate from the sheet-metal parts. ### Claim 9 (depends on 2) The freewheel arrangement as claimed in claim 2 wherein the second sheet-metal part has a side face that faces the first sheet-metal part and is supported by at least 50% of the first sheet metal part. ### Claim 10 (depends on 9) The freewheel arrangement as claimed in claim 9 wherein the side face is fully supported on the first sheet metal part. ### Claim 11 (depends on 2) The freewheel arrangement as claimed in claim 2 wherein the second sheet-metal part has less thickness than the first sheet-metal part. ### Claim 12 A freewheel arrangement for a drive train including a starter freewheel having a first race, a second race, a wedging gap formed between the first and second races, at least one wedging element arranged in the wedging gap, and at least one further component, which is in rotary drive connection with a corresponding one of the races, wherein the further component is formed by at least two sheet-metal parts connected to one another sandwich-fashion, wherein the two sheet-metal parts include a first sheet-metal part and a second sheet-metal part connected to one another in such a way that torque can be transmitted via just one of the two sheet-metal parts wherein the two sheet-metal parts are connected to one another with a damping layer placed in between, wherein the damping layer is softer and/or more flexible than the two sheet-metal parts. ### Claim 13 (depends on 12) The freewheel arrangement as claimed in claim 12 wherein the two sheet-metal parts are connected to one another nonpositively, positively, or a combination of nonpositively and positively. ### Claim 14 (depends on 12) The freewheel arrangement as claimed in claim 12 wherein the damping layer is formed from a viscoelastic and/or nonmetallic material, or the damping layer is adhesively bonded to at least one of the sheet-metal parts, or the damping layer is vulcanized to at least one of the sheet-metal parts. ### Claim 15 (depends on 12) The freewheel arrangement as claimed in claim 12 wherein the damping layer is clamped between the sheet-metal parts as a damping layer separate from the sheet-metal parts. ### Claim 16 A freewheel arrangement for a drive train including a starter freewheel having a first race, a second race, a wedging gap formed between the first and second races, at least one wedging element arranged in the wedging gap, and at least one further component, which is in rotary drive connection with a corresponding one of the races, wherein the further component is formed by at least two sheet-metal parts connected to one another sandwich-fashion, wherein the two sheet-metal parts include a first sheet-metal part and a second sheet-metal part connected to one another in such a way that torque can be transmitted via just one of the two sheet-metal parts wherein the two sheet-metal parts include a first sheet-metal part, and a second sheet-metal part having a side face that faces the first sheet-metal part is supported by at least 50% of the first sheet metal part. ### Claim 17 A freewheel arrangement for a drive train including a starter freewheel having a first race, a second race, a wedging gap formed between the first and second races, at least one wedging element arranged in the wedging gap, and at least one further component, which is in rotary drive connection with a corresponding one of the races, wherein the further component is formed by at least two sheet-metal parts connected to one another sandwich-fashion, wherein the two sheet-metal parts include a first sheet-metal part and a second sheet-metal part connected to one another in such a way that torque can be transmitted via just one of the two sheet-metal parts, wherein sheet-metal of the second sheet-metal part has less thickness than sheet-metal of the first sheet-metal part. ### Claim 18 (depends on 17) The freewheel arrangement as claimed in claim 17 wherein the side face is fully supported on the first sheet metal part.