Shift-by-wire shifting device having mechanical parking lock actuation

Patent metadata

Field	Value
Publication number	US-9382999-B2
Application number	US-201113701890-A
Country	US
Kind code	B2
Filing date	May 13, 2011
Priority date	Jun 4, 2010
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

An actuation device for selecting gear settings of a shift-by-wire gear shifting transmission comprises an actuation element, a mechanical transference for actuating the parking brake, and a coupling device disposed between the actuation element and the mechanical transference. An actuation of the transference occurs selectively by the actuation element only when the parking brake setting is selected or de-selected at the shift lever.
It is possible, structurally as well as with respect to its installment, to simplify the transference mechanism necessary for the selective actuation of the transference means for the parking brake. Structural space and costs can be reduced, and the actuation device can be designed to be smooth and quiet.

First claim

The invention claimed is:

1. An actuation device for selecting gear settings of a shift-by-wire gear shifting transmission, the actuation device comprising:
an actuation element that can move along a shifting path between a parking brake setting and a driving gear setting,
a mechanical transference device for mechanically actuating the parking brake, and
a coupling device disposed between the actuation element and the mechanical transference device,
wherein the coupling device is configured for the selective actuation of the mechanical transference device only when the actuation element moves into or out of the parking brake setting,
wherein the coupling device comprises a substantially prismatic bearing guide having a notch and a two-part coupling carriage supported in a displaceable manner along the bearing guide, the two-part coupling carriage comprising an actuation-side carriage part and a transference-device-side carriage part,
wherein the actuation-side carriage part and the transference-device-side carriage part overlap one another in the coupled position at an overlap section in an axial plane of the bearing guide,
wherein a locking element is disposed in the transference-device-side carriage part in the overlapping section, at a right angle to the bearing guide, supported in a moveable manner, and spaced apart from the bearing guide and the notch,
wherein the locking element can move perpendicular to the bearing guide between a first relative position and a non-self-limiting second relative position, wherein when the locking element is in the first relative position, the actuation-side carriage part and the transference-device-side carriage part are coupled together by an engagement of the locking element in both parts of the two-part coupling carriage and when the locking element is in the non-self-limiting second relative position, by moving the two-part coupling carriage along the bearing guide so that the locking element is over the notch, the engagement of the locking element with the actuation-side carriage part is released.

2. The actuation device according to claim 1 , wherein the locking element is axially fixed in its second relative position by engagement in the notch of the bearing guide by the transference-device-side carriage part in the bearing guide.

3. The actuation device according to claim 1 , wherein the locking element is blocked in its second relative position when the actuation-side carriage part and the transference-device-side carriage part are in a non-coupled relative position, separated from one another with respect to their coupling position.

4. The actuation device according to claim 1 , wherein the locking element is a substantially cylindrical pin.

5. The actuation device according to claim 1 , wherein the locking element is spring-loaded in the direction of the surface of the bearing guide.

6. The actuation device according to claim 1 wherein, the locking element exhibits a beveling in the region of its end engaging in the notch on the side toward the mechanical transference device, for the purpose of returning the locking element to its first relative position with a movement of the transference-device-side carriage part, with the locking element supported therein, toward the mechanical transference-device.

7. The actuation device according to claim 1 , wherein the notch exhibits a beveling on the side toward the mechanical transference device for the return of the locking element to its first relative position with a movement of the transference-device-side carriage part, with the locking element supported therein, toward the mechanical transference device.

8. The actuation device according to claim 1 , wherein the locking element and a coupling recess of the actuation-side carriage part exhibit a beveling in the region of the locking element at the side toward the mechanical transference device at the end of the locking element engaging in the coupling recess, for supporting the movement of the locking element from its first to its second relative position.

9. The actuation device according to claim 1 , wherein the mechanical transference device is a cable pull.

10. The actuation device according to claim 1 , wherein the coupling device is substantially symmetrical to a longitudinal plane of the bearing guide, and
comprises two locking elements disposed in opposition to one another.

11. The actuation device according to claim 1 , wherein the transference-device-side carriage part exhibits a substantially prismatic or fork-shaped carriage recess in the section overlapping the actuation-side carriage part, and the actuation-side carriage part exhibits a projection corresponding in shape to the carriage recess in the overlapping section, wherein the locking elements are disposed in the region of the carriage recess of the transference-device-side carriage part.

12. The actuation device according to claim 1 , wherein the coupling device is arc shaped and is disposed along an arc segment about a point of rotation of the shift lever.

Assignees

• Giefer Andreas
• Rake Ludger
• Zahnradfabrik Friedrichshafen

Inventors

• Giefer Andreas
• Rake Ludger

Classifications

• F16H63/3491

  Emergency release or engagement of parking locks or brakes · CPC title

• F16H59/02 Primary

  Selector apparatus · CPC title

• F16H59/0204

  for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic · CPC title

• Y10T74/20049

  Transmission controlled by flexible cable · CPC title

• F16H59/10 Primary

  comprising levers · CPC title