# US 2023/0406448 A1 · Electromechanical derailleur for coaxial assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0406448 A1 - Document ID: US20230406448A1 - Status: Published application - Kind: A1 - Application number: 18/460,981 - Filed: 2023-09-05 - Published: 2023-12-21 - Earliest claimed: 2020-09-03 - Assignees: SRAM Deutschland GmbH - Applicants: SRAM DEUTSCHLAND GmbH - Inventors: HENRIK BRAEDT; HEIKO REDECKER - Web page: https://patentgrep.com/patent/US20230406448A1 ## CPC - B62M 9/1248: characterised by the use of biasing means, e.g. springs; Arrangements thereof - B62M 9/121: Rear derailleurs - B62M 9/122: electrically or fluid actuated; Controls thereof - B62M 9/124: Mechanisms for shifting laterally - B62M 9/125: Mounting the derailleur on the frame - B62M 9/126: Chain guides; Mounting thereof - B62M 2009/12406: {Rear derailleur comprising a rigid pivoting arm} - B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16) ## Abstract The disclosure relates to an electromechanical rear derailleur for coaxial assembling on a rear wheel axle. The derailleur has a base element, a pivot mechanism, and a movable element having a chain guide assembly. The chain guide assembly is connected to the movable element so as to be rotatable about a rotation axis. A blocking device permits the chain guide assembly to be established relative to the movable element. The blocking device is able to be inserted into the movable element in two different positions. ## Claims ### Claim 1 A rear derailleur for a bicycle gearshift mechanism, comprising: a base element attachable to a bicycle frame; a movable element coupled to the base element and repositionable relative to the base element; a chain guide assembly coupled to the movable element and pivotable relative to the moveable element about a pivot axle; a pre-tensioning installation configured to pre-tension the chain guide assembly relative to the movable element about the pivot axle to an initial setting, wherein the chain guide assembly, counter to a tensioning force of the pre-tensioning installation, is pivotable from the initial setting about the pivot axle to various operating settings; and at least one blocking device for blocking the chain guide assembly in at least one blocking setting, deviating from the initial setting, relative to the movable element, wherein the at least one blocking device has a blocking element which is repositionable between a passive setting in which said at least one blocking device releases the chain guide assembly relative to the movable element, and at least one active setting in which the at least one blocking device holds the chain guide assembly in the at least one blocking setting. ### Claim 2 (depends on 1) The rear derailleur of claim 1, wherein the chain guide assembly has at least one contact element in the form of an outer cage plate or an opening in the cage plate, which for blocking the chain guide assembly in the at least one blocking setting interacts with the blocking element or is able to be brought to engage with the blocking element. ### Claim 3 (depends on 1) The rear derailleur of claim 1, wherein the at least one blocking device is disposed, in a receptacle opening of the movable element. ### Claim 4 (depends on 1) The rear derailleur of claim 1, wherein the blocking element is repositionable in the direction of the pivot axle or parallel to the pivot axle. ### Claim 5 (depends on 1) The rear derailleur of claim 1, wherein the blocking element along a longitudinal axis is repositionable between the at least one active setting and the passive setting. ### Claim 6 (depends on 1) The rear derailleur of claim 1, wherein the at least one blocking device includes a pin housing for mounting the blocking element. ### Claim 7 (depends on 6) The rear derailleur of claim 6, wherein the blocking element, by a spring installation, is pre-tensioned to the passive setting. ### Claim 8 (depends on 7) The rear derailleur of claim 7, wherein the at least one blocking device has a longitudinal axis, and the blocking element has a longitudinal axis, and the two longitudinal axes run so as to be mutually spaced apart and mutually parallel. ### Claim 9 (depends on 7) The rear derailleur of claim 7, wherein the blocking element has a longitudinal axis, and the pin housing has a housing longitudinal axis, and the two longitudinal axes run so as to be mutually spaced apart and mutually parallel. ### Claim 10 (depends on 9) The rear derailleur of claim 9, wherein the blocking element is eccentrically mounted in the pin housing. ### Claim 11 (depends on 10) The rear derailleur of claim 10, wherein the blocking element is formed by a thrust pin which is configured having a contact face by way of which said thrust pin in the at least one blocking setting for blocking the chain guide assembly relative to the movable element engages in a form-fitting or force-fitting manner on an edge or an opening of an outer cage plate of the chain guide assembly. ### Claim 12 (depends on 11) The rear derailleur of claim 11, wherein the blocking element in a second blocking setting engages on a lower cage arm between a lower chain guide roller and the pivot axle, the second blocking setting is assumed for adjusting the rear derailleur relative to a multi-sprocket assembly. ### Claim 13 (depends on 12) The rear derailleur of claim 12, wherein the thrust pin for manual activation has a compression face/compression end. ### Claim 14 (depends on 13) The rear derailleur of claim 13, wherein the at least one blocking device, composed of the blocking element and the pin housing, is able to be mounted in a first position or in a second position on the movable element in a receptacle opening of the movable element. ### Claim 15 A method for adjusting a bicycle drive including a rear derailleur, a multi-chain wheel assembly, a front chainring and a chain, wherein the rear derailleur is adjusted relative to the multi-chain wheel assembly, the method comprising: determining a bicycle category; depending on the bicycle category, shifting to a reference sprocket, such that the chain engages with the reference sprocket; depending on the bicycle category, selecting an adjustment position and adjusting the at least one blocking device to a first, second or third position; repositioning the blocking device to an active setting such that a chain guide assembly is established relative to a movable element of the rear derailleur; and rotating the rear derailleur rearward about a rear wheel axle until an ideal chain tension is achieved. ### Claim 16 (depends on 15) The method of claim 15, wherein the reference sprocket is one of the central sprockets of the multi-chain wheel assembly.