US 12,674,511 B2Granted

Parking lock arrangement for a vehicle transmission

AssigneeZF Friedrichshafen AG

InventorsPatrick Klein, Georg Seltmann, Tobias Miller, Robert Strauch, Matthias List, Lars-Erik Meyer

Life of this patent

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Abstract

A parking lock arrangement for a motor vehicle transmission includes a parking lock gear arranged on a transmission shaft by sliding onto a guide region (7) defined on the radially outward side of the component (2) via a guide region (6) formed on the radially inward side of the parking lock gear (4). In the final position, a recess (14) extending peripherally around the guide region (6) of the parking lock gear (4) has been axially brought into overlap with a recess (13) extending peripherally around the guide region (7) of the component. The parking lock gear (4) and the component are securable against each other via a securing ring. The securing ring engages partially radially into the recess (14) in the guide region (6) on the parking lock gear (4) and partially radially into the recess (13) in the guide region (7) on the component.

Claims19

Dependent claims

A parking lock arrangement (1;

34;
36;
39;
49;
51;
53;
55;
71) for a motor vehicle transmission, comprising:
a parking lock gear (4) arranged on a component (2) in a final position, the component (2) including a transmission shaft (3), the parking lock gear (4) is configured for sliding onto a guide region (7;
58) defined on a radially outward side of the component (2) via a guide region (6;
41;
60) formed on a radially inward side of the parking lock gear (4), a recess (14;
40;
59) extending peripherally around the guide region (6;
41;
60) of the parking lock gear (4) being in axial overlap with a recess (13;
57) extending peripherally around the guide region (7;
58) of the component (2) when the parking lock gear (4) is in the final position;
and
a securing ring,
wherein, in the final position, the parking lock gear (4) and the component (2) are securable against each other in at least one axial direction by the securing ring positioned radially between the parking lock gear (4) and the component (2),
wherein, in a securing position of the securing ring, the securing ring is configured to engage partially radially into the recess (14;
40;
59) in the guide region (6;
41;
60) on the parking lock gear (4) and partially radially into the recess (13;
57) in the guide region (7;
58) on the component (2),
wherein the securing ring comprises a snap ring (12;
56;
72;
73), the snap ring (12;
56;
72;
73) being slotted and radially elastic, and a cross-sectional geometry of the snap ring (12;
56;
72;
73) being greater in an axial extension than in a radial extension, and
wherein the parking lock gear (4) in the final position rests in a first axial direction against an abutment shoulder (11) that extends in a radially outward direction and peripherally around the component (2), the parking lock gear (4) blocked from migrating out of the final position in a second axial direction, in that, when the parking lock gear (4) migrates in the second axial direction, the snap ring (12;
56) abuts against one first support shoulder (22;
64) formed by the recess (13;
57) in the component (2) facing axially towards the abutment shoulder and against one second support shoulder (19;
65) formed by the recess (14;
59) in the parking lock gear (4) facing axially in the second axial direction.

41 more elements

A parking lock arrangement (1;

34;
36;
39;
49;
51;
53;
55;
71) for a motor vehicle transmission, comprising:
a parking lock gear (4) arranged on a component (2) in a final position, the component (2) including a transmission shaft (3), the parking lock gear (4) is configured for sliding onto a guide region (7;
58) defined on a radially outward side of the component (2) via a guide region (6;
41;
60) formed on a radially inward side of the parking lock gear (4), a recess (14;
40;
59) extending peripherally around the guide region (6;
41;
60) of the parking lock gear (4) being in axial overlap with a recess (13;
57) extending peripherally around the guide region (7;
58) of the component (2) when the parking lock gear (4) is in the final position;
and
a securing ring,
wherein, in the final position, the parking lock gear (4) and the component (2) are securable against each other in at least one axial direction by the securing ring positioned radially between the parking lock gear (4) and the component (2),
wherein, in a securing position of the securing ring, the securing ring is configured to engage partially radially into the recess (14;
40;
59) in the guide region (6;
41;
60) on the parking lock gear (4) and partially radially into the recess (13;
57) in the guide region (7;
58) on the component (2),
wherein the securing ring comprises a snap ring (12;
56;
72;
73), the snap ring (12;
56;
72;
73) being slotted and radially elastic, and a cross-sectional geometry of the snap ring (12;
56;
72;
73) being greater in an axial extension than in a radial extension,
wherein, in one (7;
58) of the guide regions (6, 7;
7, 41;
58, 60), the recess (13;
57) comprises a receiving groove (15;
61) axially delimited on both sides and dimensioned for the snap ring (12;
56) to plunge completely into the receiving groove (15;
61) by radial preloading into an installation position,
wherein the other guide region (6;
41) also defines an installation contour (23;
47) for the snap ring (12) with an axial pre-installation section (24;
48) having a pre-installation diameter (25),
wherein the pre-installation diameter (25) is configured to accommodate the snap ring (12) on the other guide region (6;
41) in a pre-installation position,
wherein, in the installation contour (23;
47), an axial installation section (29) is defined in an axial slide-on direction in which the parking lock gear (4) is to be axially slid onto the component (2) into the final position, downstream from the axial pre-installation section (24;
48) and upstream from the recess (14;
40) in the other guide region (6;
41),
wherein the axial installation section including an installation diameter (31) configured for effecting a radial preloading of the snap ring (12) in the installation position of the snap ring (12) when the snap ring (12) is axially positioned on the axial installation section (29), and
wherein a second groove flank (17) of the receiving groove (15) disposed axially in the axial slide-on direction includes a radial extension at which the snap ring (12) radially overlaps with the second groove flank (17) when the snap ring (12) is in the pre-installation position such that as the parking lock gear (4) slides onto the component (2) into the final position, the snap ring (12) is configured for accommodation on the axial pre-installation section (24;
48) to rest axially against the second groove flank (17) and axially move during further sliding-on of the parking lock gear (4) from the axial pre-installation section (24;
48) onto the axial installation section (29) and therefore radially preload into the installation position in the receiving groove (15).

58 more elements

Dependencies are inferred from the claim text.