# US 10,246,311 B2 · Winch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,311 B2 - Document ID: US10246311B2 - Status: Granted - Kind: B2 - Application number: 13/809,404 - Filed: 2011-07-01 - Published: 2013-05-09 - Granted: 2019-04-02 - Earliest claimed: 2010-07-13 - Assignees: Liebherr-Components Biberach GmbH - Applicants: Johannes Bulling; Erich Harsch - Inventors: Johannes Bulling; Erich Harsch - Web page: https://patentgrep.com/patent/US10246311B2 ## CPC - B66D 1/02: Driving gear - B66D 1/12: incorporating electric motors - B66D 1/22: Planetary or differential gearings (for actuating grab buckets B66D1/70 ){, i.e. with planet gears having movable axes of rotation} - B66D 1/54: Safety gear - B66D: CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B) ## Abstract The present invention relates to a winch, in particular a luffing winch, with a winch drum, at least one main drive driving the transmission input shaft, and at least one emergency drive driving the transmission input shaft in case of emergency, wherein at least one emergency drive can be coupled to the driven wheel of the transmission input shaft as required via at least one intermediate gear. The present invention furthermore is directed to a construction machine or a lifting device with at least one such winch. ## Claims ### Claim 1 A winch, comprising: a winch drum arranged on a drum shaft; at least one main drive driving the drum shaft, the main drive arranged coaxially with the winch drum on the drum shaft; and at least one emergency drive driving the drum shaft in case of emergency, the emergency drive comprising a drive wheel, wherein at least one emergency drive is coupleable to a driven wheel of the drum shaft as required via at least one intermediate gear, the intermediate gear in constant engagement with the emergency drive, via the drive wheel, independent of a current position of the intermediate gear and shiftably mounted for coupling in and out in a direction of its shaft axis, the driven wheel arranged on the drum shaft between the winch drum and the main drive. ### Claim 2 (depends on 1) The winch according to claim 1, wherein the at least one intermediate gear is coupleable in or out in the direction of its shaft axis via a lever mechanism. ### Claim 3 (depends on 1) The winch according to claim 1, wherein the at least one intermediate gear is fixed in its position by at least one locking bolt. ### Claim 4 (depends on 1) The winch according to claim 1, wherein a winch brake is arranged coaxially with the main drive and the winch drum on the drum shaft. ### Claim 5 (depends on 1) The winch according to claim 1, wherein toothing of the at least one intermediate gear and/or of the driven wheel is designed as roof-like toothing. ### Claim 6 (depends on 1) The winch according to claim 1, wherein the drive wheel includes at least one hexagon. ### Claim 7 (depends on 1) The winch according to claim 1, further comprising at least one position detector of the intermediate gear. ### Claim 8 (depends on 1) The winch according to claim 1, further comprising one or more slotted spacer bushes for decoupling the main drive. ### Claim 9 (depends on 1) The winch according to claim 1, wherein the winch is a luffing winch of a construction machine. ### Claim 10 A winch, comprising: a winch drum arranged on a drum shaft; at least one main drive driving the drum shaft, the main drive arranged coaxially with the winch drum on the drum shaft; and at least one emergency drive driving the drum shaft in case of emergency, wherein at least one emergency drive is coupleable to a driven wheel of the drum shaft via at least one intermediate gear, the intermediate gear shiftably mounted for coupling in and out in a direction of its shaft axis, the driven wheel arranged on the drum shaft between the winch drum and the main drive; wherein, when the emergency drive drives the drum shaft, the intermediate gear is shifted along its shaft axis via actuation of a lever mechanism until it engages in the driven wheel, and wherein, when the main drive drives the drum shaft and the emergency drive is shut off, the intermediate gear is not in engagement with the driven wheel. ### Claim 11 (depends on 10) The winch according to claim 10, wherein the intermediate gear is in constant engagement with a drive wheel of the emergency drive independent of a current position of the intermediate gear. ### Claim 12 (depends on 10) The winch according to claim 10, wherein the lever mechanism is connected with an oblong intermediate gear receptacle which extends in the direction of the shaft axis of the intermediate gear, and wherein, upon actuation of the lever mechanism, the receptacle shifts the intermediate gear in the direction of its shaft axis to bring it into engagement with the driven wheel. ### Claim 13 (depends on 10) The winch according to claim 10 further comprising a braking device, the braking device comprising a braking disc arranged coaxially with the main drive and the winch drum on the drum shaft. ### Claim 14 (depends on 13) The winch according to claim 13, wherein engagement of the braking device generates a braking moment acting on the winch drum. ### Claim 15 (depends on 10) The winch according to claim 10, wherein the emergency drive is arranged laterally offset from the drum shaft, and wherein the drum shaft and a drive shaft of the emergency drive extend parallel to each other. ### Claim 16 (depends on 11) The winch according to claim 11, wherein the drive wheel of the emergency drive is arranged at an end of a shaft of the emergency drive. ### Claim 17 (depends on 1) The winch according to claim 1 further comprising a braking device, the braking device comprising a braking disc arranged coaxially with the main drive and the winch drum on the drum shaft. ### Claim 18 (depends on 11) The winch according to claim 11, wherein engagement of the braking device generates a braking moment acting on the winch drum. ### Claim 19 (depends on 6) The winch according to claim 6, wherein the intermediate gear is in constant engagement with the drive wheel independent of a current position of the intermediate gear, and wherein the drive wheel is arranged at an end of a shaft of the emergency drive.