# US 11,079,003 B2 · Belt pulley decoupler > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,003 B2 - Document ID: US11079003B2 - Status: Granted - Kind: B2 - Application number: 16/305,578 - Filed: 2017-06-27 - Published: 2020-10-22 - Granted: 2021-08-03 - Earliest claimed: 2016-06-28 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Andreas Gotz; Eugen Bauer - Web page: https://patentgrep.com/patent/US11079003B2 ## CPC - F16H 55/36: Pulleys (with features essential for adjustment F16H55/52) - F16D 3/12: specially adapted for accumulation of energy to absorb shocks or vibration (by making use of fluid elements F16D3/80) - F16D 41/206: {having axially adjacent coils, e.g. helical wrap-springs} - F02B 67/06: driven by means of chains, belts, or like endless members - F16H 2055/363: {with special means or properties for lateral tracking of the flexible members running on the pulley, e.g. with crowning to keep a belt on track} - F16H: GEARING - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) ## Abstract A belt pulley decoupler for transmitting drive torque from the belt of an auxiliary unit belt drive to the shaft of one of the auxiliary units is provided, including: a belt pulley, a hub to be mounted on the shaft, a first sleeve, which is rotationally fixed in the pulley, a second sleeve, which is rotatable in the pulley, and a series circuit of a decoupler spring and a disposed in the drive torque flow between the belt pulley and the hub. The wrap-around band ends, which couple the two sleeves to one another non-rotatably while transmitting the drive torque, extend the wrap-around band radially. One of the two sleeves has a circumferentially extending slot and the wrap-around band end coupled to this sleeve is configured as a leg, which interlockingly engages in the slot non-rotatably in a direction of rotation of the drive torque. ## Claims ### Claim 1 A belt pulley decoupler for transmitting drive torque from a belt of an auxiliary unit belt drive to a shaft of an auxiliary unit, the belt pulley decoupler comprising: a belt pulley, a hub adapted to be mounted on the shaft, a first sleeve rotationally locked in the belt pulley, a second sleeve that is rotatable in the belt pulley, and a series circuit arranged in a flow of drive torque between the belt pulley and the hub, the series circuit comprising a decoupler spring and a wrap-around band that extends in a direction of a rotational axis of the belt pulley decoupler and is arranged radially between the first and second sleeves and the decoupler spring, the wrap-around band includes ends that widen the wrap-around band radially, such that the two sleeves are coupled with each other in a rotationally locked manner while transmitting the drive torque, one of the two sleeves has a slot extending circumferentially and the wrap-around band end coupled with said one of the two sleeves is constructed as a leg that is engaged with a positive-locking connection in a rotationally locked manner in the slot in a direction of rotation of the drive torque. ### Claim 2 (depends on 1) The belt pulley decoupler according to claim 1, wherein the leg is engaged in a self-locking manner in the slot against the direction of rotation of the drive torque. ### Claim 3 (depends on 1) The belt pulley decoupler according to claim 1, wherein the leg is engaged with a positive-locking connection in the slot against the direction of rotation of the drive torque. ### Claim 4 (depends on 1) The belt pulley decoupler according to claim 1, wherein the leg is coupled rotationally locked with the first sleeve. ### Claim 5 (depends on 1) The belt pulley decoupler according to claim 1, wherein the second sleeve is supported radially in the first sleeve. ### Claim 6 (depends on 1) The belt pulley decoupler according to claim 1, further comprising a roller bearing that supports the belt pulley on the hub, a sliding bearing sleeve that is supported radially against the belt pulley and axially against the roller bearing, and the second sleeve is supported in the sliding bearing sleeve. ### Claim 7 (depends on 6) The belt pulley decoupler according to claim 6, wherein the roller bearing is a grooved ball bearing and the sliding bearing sleeve contacts an outer ring of the grooved ball bearing. ### Claim 8 A belt pulley decoupler for transmitting drive torque from a belt of an auxiliary unit belt drive to a shaft of an auxiliary unit, the belt pulley decoupler comprising: a belt pulley, a hub adapted to be mounted on the shaft, a first sleeve rotationally locked in the belt pulley, a second sleeve that engages the first sleeve and is rotatable in the belt pulley, and a decoupler spring and a wrap-around band arranged between the belt pulley and the hub that carry a flow of drive torque from the belt pulley to the hub, the wrap-around band extends in a direction of a rotational axis of the belt pulley decoupler and is arranged radially between the first and second sleeves and the decoupler spring, the wrap-around band includes ends that are adapted to widen the wrap-around band radially during drive torque transmission, such that the first and second sleeves are coupled with each other in a rotationally locked manner, one of the two sleeves has a slot extending circumferentially and the wrap-around band end coupled with said one of the two sleeves is constructed as a leg that is engaged with a positive-locking connection in a rotationally locked manner in the slot in a direction of rotation of the drive torque. ### Claim 9 (depends on 8) The belt pulley decoupler according to claim 8, wherein the leg is engaged in a self-locking manner in the slot against the direction of rotation of the drive torque. ### Claim 10 (depends on 8) The belt pulley decoupler according to claim 8, wherein the leg is engaged with a positive-locking connection in the slot against the direction of rotation of the drive torque. ### Claim 11 (depends on 8) The belt pulley decoupler according to claim 8, wherein the second sleeve is radially supported on a stepped inner lateral surface of the first sleeve. ### Claim 12 (depends on 11) The belt pulley decoupler according to claim 11, further comprising a sliding bearing sleeve that is supported radially against the belt pulley, and the second sleeve is supported in the sliding bearing sleeve. ### Claim 13 (depends on 8) The belt pulley decoupler according to claim 8, wherein the leg is coupled rotationally locked with the first sleeve. ### Claim 14 (depends on 8) The belt pulley decoupler according to claim 8, further comprising a roller bearing that supports the belt pulley on the hub. ### Claim 15 (depends on 14) The belt pulley decoupler according to claim 14, further comprising a sliding bearing sleeve that is supported radially against the belt pulley and axially against the roller bearing, and the second sleeve is supported in the sliding bearing sleeve. ### Claim 16 (depends on 15) The belt pulley decoupler according to claim 15, wherein the roller bearing is a grooved ball bearing and the sliding bearing sleeve contacts an outer ring of the grooved ball bearing.