# US 9,518,657 B2 · Parking lock arrangement and motor vehicle transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,657 B2 - Document ID: US9518657B2 - Status: Granted - Kind: B2 - Application number: 14/636,358 - Filed: 2015-03-03 - Published: 2015-09-10 - Granted: 2016-12-13 - Earliest claimed: 2014-03-04 - Assignees: GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG - Applicants: GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG - Inventors: Andras Kristofcsak - Web page: https://patentgrep.com/patent/US9518657B2 ## CPC - F16H 63/3491: {Emergency release or engagement of parking locks or brakes} - F16H 63/18: the final actuating mechanism comprising cams - F16H 63/3408: {the locking mechanism being moved by the final actuating mechanism} - F16H 63/3416: {Parking lock mechanisms or brakes in the transmission} - F16H 63/3425: {characterised by pawls or wheels} - F16H 63/3458: {with electric actuating means, e.g. shift by wire} - F16H 63/3483: {with hydraulic actuating means} - F16H 61/12: Detecting malfunction or potential malfunction, e.g. fail safe (in control of hydrostatic gearing F16H61/4192) {; Circumventing or fixing failures} - F16H: GEARING ## Abstract A parking lock arrangement for a motor vehicle transmission has a housing. A parking lock wheel is connectable to a shaft of the motor vehicle transmission. A parking lock pawl is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing. In the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof. The parking lock arrangement comprises an actuating mechanism for the parking lock pawl and an actuator arrangement for the actuating mechanism. The actuator arrangement has a control member which is movable between a home position and a parking position and is coupled to the actuating mechanism. An actuating member is coupled to the control member via a releasable coupling device and to the actuating mechanism, wherein the actuating member is furthermore mechanically preloaded in one direction in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position. The coupling device is designed in such a manner that it is releasable by means of an electric release signal. ## Claims ### Claim 1 A parking lock arrangement for a motor vehicle transmission, comprising: a housing; a parking lock wheel which is connectable to a shaft of the motor vehicle transmission; a parking lock pawl which is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing, wherein, in the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof; an actuating mechanism for the parking lock pawl; and an actuator arrangement for the actuating mechanism, wherein the actuator arrangement has a drum which is rotatable between a home position and a parking position, wherein the drum has a cam portion assigned to the parking position, wherein the actuator arrangement furthermore has a lever arrangement with a cam lever which is pivotable about a lever axis mounted on the housing, and which has a cam follower portion, wherein the cam lever is pivoted when the cam follower portion comes into engagement with the cam portion of the drum and the cam lever is coupled to the actuating mechanism, wherein the lever arrangement has an actuating lever which is coupled to the cam lever via a releasable coupling device and is positively coupled to the actuating mechanism, wherein the actuating lever is furthermore mechanically preloaded in a pivoting direction in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position, and wherein the coupling device is designed in such a manner that it is releasable by means of an electric or a hydraulic release signal. ### Claim 2 (depends on 1) The parking lock arrangement according to claim 1, wherein the actuating lever is pivotable about the lever axis. ### Claim 3 (depends on 1) The parking lock arrangement according to claim 1, wherein the coupling device has a coupling pin which, in a coupling position, passes axially through openings in the cam lever and in the actuating lever. ### Claim 4 (depends on 3) The parking lock arrangement according to claim 3, wherein the coupling pin is preloaded into the coupling position. ### Claim 5 (depends on 3) The parking lock arrangement according to claim 3, wherein the coupling pin is mounted on the actuating lever in an axially displaceable manner. ### Claim 6 (depends on 3) The parking lock arrangement according to claim 3, wherein the coupling pin is movable axially by means of a magnetic actuator in order to release the coupling device. ### Claim 7 (depends on 6) The parking lock arrangement according to claim 6, wherein the magnetic actuator is fixed on the cam lever. ### Claim 8 (depends on 1) The parking lock arrangement according to claim 1, wherein the actuating lever is assigned a lever position sensor which senses the position of the actuating lever. ### Claim 9 (depends on 1) The parking lock arrangement according to claim 1, wherein the rotational position of the drum can be sensed by means of a rotational position sensor. ### Claim 10 (depends on 1) The parking lock arrangement according to claim 1, wherein the cam lever and the actuating lever are pressed axially on each other by means of a spring arrangement. ### Claim 11 A parking lock arrangement for a motor vehicle transmission, comprising: a housing; a parking lock wheel which is connectable to a shaft of the motor vehicle transmission; a parking lock pawl which is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing, wherein, in the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof; an actuating mechanism for the parking lock pawl, the actuating mechanism having a bar on which a sliding key for engagement with the parking lock pawl is mounted; and an actuator arrangement for the actuating mechanism, wherein the actuator arrangement has a control member which is movable between a home position and a parking position and is coupled to the actuating mechanism, wherein the actuator arrangement has an actuating lever which is coupled to the control member via a releasable coupling device and is positively coupled in an articulated manner to the bar of the actuating mechanism, wherein the actuating lever is furthermore mechanically preloaded in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position, and wherein the coupling device is designed in such a manner that it is releasable by means of an electric or a hydraulic release signal. ### Claim 12 (depends on 11) The parking lock arrangement according to claim 11, wherein the coupling device has a coupling pin which, in a coupling position, passes axially through openings in the control member and in the actuating lever. ### Claim 13 (depends on 12) The parking lock arrangement according to claim 12, wherein the coupling pin is preloaded into the coupling position. ### Claim 14 (depends on 12) The parking lock arrangement according to claim 12, wherein the coupling pin is mounted on the actuating lever in an axially displaceable manner. ### Claim 15 (depends on 12) The parking lock arrangement according to claim 12, wherein the coupling pin is movable axially by means of a magnetic actuator in order to release the coupling device. ### Claim 16 (depends on 15) The parking lock arrangement according to claim 15, wherein the magnetic actuator is fixed on the control member. ### Claim 17 (depends on 11) The parking lock arrangement according to claim 11, wherein the actuating lever is assigned a position sensor which senses the position of the actuating lever. ### Claim 18 (depends on 11) The parking lock arrangement according to claim 11, wherein a position of the control member can be sensed by means of a position sensor. ### Claim 19 A parking lock arrangement for a motor vehicle transmission, comprising: a housing; a parking lock wheel which is connectable to a shaft of the motor vehicle transmission; a parking lock pawl which is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing, wherein, in the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof; an actuating mechanism for the parking lock pawl; and an actuator arrangement for the actuating mechanism, wherein the actuator arrangement has a drum which is rotatable between a home position and a parking position, wherein the drum has a cam portion assigned to the parking position, wherein the actuator arrangement furthermore has a lever arrangement with a cam lever which is pivotable about a lever axis mounted on the housing, and which has a cam follower portion, wherein the cam lever is coupled to the actuating mechanism, wherein the lever arrangement has an actuating lever which is coupled to the cam lever via a releasable coupling device and is positively coupled to the actuating mechanism, wherein the actuating lever is furthermore mechanically preloaded in a pivoting direction in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position, and wherein the coupling device is designed in such a manner that it is releasable by means of an electric or a hydraulic release signal, and wherein the actuating lever is pivotable about the same lever axis as the cam lever. ### Claim 20 A parking lock arrangement for a motor vehicle transmission, comprising: a housing; a parking lock wheel which is connectable to a shaft of the motor vehicle transmission; a parking lock pawl which is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing, wherein, in the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof; an actuating mechanism for the parking lock pawl; and an actuator arrangement for the actuating mechanism, wherein the actuator arrangement has a drum which is rotatable between a home position and a parking position, wherein the drum has a cam portion assigned to the parking position, wherein the actuator arrangement furthermore has a lever arrangement with a cam lever which is pivotable about a lever axis mounted on the housing, and which has a cam follower portion, wherein the cam lever is coupled to the actuating mechanism, wherein the lever arrangement has an actuating lever which is coupled to the cam lever via a releasable coupling device and is positively coupled to the actuating mechanism, wherein the actuating lever is furthermore mechanically preloaded in a pivoting direction in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position, and wherein the coupling device is designed in such a manner that it is releasable by means of an electric or a hydraulic release signal, wherein the cam lever and the actuating lever are pressed axially on each other by means of a spring arrangement. ### Claim 21 A parking lock arrangement for a motor vehicle transmission, comprising: a housing; a parking lock wheel which is connectable to a shaft of the motor vehicle transmission; a parking lock pawl which is pivotable between a parking lock position and a release position about a pawl axis mounted on the housing, wherein, in the parking lock position, the parking lock pawl is in engagement with the parking lock wheel and prevents the rotation thereof; an actuating mechanism for the parking lock pawl; and an actuator arrangement for the actuating mechanism, wherein the actuator arrangement has a control member which is movable between a home position and a parking position and is coupled to the actuating mechanism, wherein the actuator arrangement has an actuating member which is coupled to the control member via a releasable coupling device and is positively coupled to the actuating mechanism, wherein the actuating member is furthermore mechanically preloaded in order, via the actuating mechanism, to press the parking lock pawl into the parking lock position, and wherein the coupling device is designed in such a manner that it is releasable by means of an electric or a hydraulic release signal, wherein the coupling device has a coupling pin which, in a coupling position, passes axially through openings in the control member and in the actuating member, and wherein the coupling pin is mounted on the actuating member in an axially displaceable manner.