Parking lock and method for the assembly thereof

Patent metadata

Field	Value
Publication number	US-11614167-B2
Application number	US-201917288024-A
Country	US
Kind code	B2
Filing date	Nov 21, 2019
Priority date	Nov 21, 2018
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A parking lock has a parking lock housing (20), a locking pawl (12) which has a ratchet (16) that can be locked in a parking lock wheel (56) and a pawl profile (44) arranged on the rear side of the ratchet (16), an actuating unit (24) which acts upon the pawl profile (44) when the parking lock (10) is engaged and thereby rotates the locking pawl (12) about a rotational axis (14) relative to the parking lock housing (20), and a supporting element (18), on which the actuating unit (24) is supported in the engaged state (P) and in the disengaged state (nP) of the parking lock (10) at different positions. The supporting element (18) is connected to the parking lock housing (20) so as to have play.

First claim

The invention claimed is:

1. A parking lock comprising:
a parking lock housing,
a locking pawl which has a ratchet that can be locked in a parking lock wheel and a pawl profile arranged on a rear side of the ratchet,
an actuating unit which acts on the pawl profile to lock the ratchet in the parking lock wheel by rotating the locking pawl about a rotational axis relative to the parking lock housing,
a supporting element on which the actuating unit is supported in an engaged state,
wherein the supporting element is connected to the parking lock housing by a plurality of lugs arranged in lug receptacles so as to have play.

2. The parking lock according to claim 1 , wherein the supporting element is a raceway plate.

3. The parking lock according to claim 1 , wherein the supporting element is oriented in a direction of displacement of the actuating unit.

4. The parking lock according to claim 3 , wherein the supporting element is connected to the parking lock housing having almost no axial play in the direction of displacement and having radial play normal to the direction of displacement.

5. The parking lock according to claim 1 , wherein the actuating unit is designed as a slide having two rollers, one of the two rollers rolling on the pawl profile and another of the two rollers rolling on the supporting element.

6. The parking lock according to claim 1 , wherein the parking lock housing has an elongated hole in which the actuating unit is positively guided.

7. The parking lock according to claim 1 , wherein the parking lock housing has two housing walls which form a U-profile with the supporting element, which laterally frame the actuating unit and the locking pawl, and which are spaced apart from one another by a spacer.

8. The parking lock according to claim 7 , wherein the spacer is hollow to accommodate a fastener for fastening the parking lock housing to a transmission.

9. A parking lock comprising:
a parking lock housing,
a locking pawl which has a ratchet that can be locked in a parking lock wheel and a pawl profile arranged on a rear side of the ratchet,
an actuating unit which acts on the pawl profile to lock the ratchet in the parking lock wheel by rotating the locking pawl about a rotational axis relative to the parking lock housing,
a supporting element on which the actuating unit is supported in an engaged state,
wherein the supporting element is connected to the parking lock housing so as to have play; and
wherein the parking lock housing has an elongated hole in which the actuating unit is positively guided.

10. The parking lock according to claim 9 , wherein the supporting element is a raceway plate.

11. The parking lock according to claim 9 , wherein the supporting element is oriented in a direction of displacement of the actuating unit.

12. The parking lock according to claim 11 , wherein the supporting element is connected to the parking lock housing having almost no axial play in the direction of displacement and having radial play normal to the direction of displacement.

13. A parking lock comprising:
a parking lock housing,
a locking pawl which has a ratchet that can be locked in a parking lock wheel and a pawl profile arranged on a rear side of the ratchet,
an actuating unit which acts on the pawl profile to lock the ratchet in the parking lock wheel by rotating the locking pawl about a rotational axis relative to the parking lock housing,
a supporting element on which the actuating unit is supported in an engaged state,
wherein the supporting element is connected to the parking lock housing so as to have play; and
wherein the parking lock housing has two housing walls which form a U-profile with the supporting element, which laterally frame the actuating unit and the locking pawl, and which are spaced apart from one another by a spacer.

14. The parking lock according to claim 13 , wherein the supporting element is a raceway plate.

15. The parking lock according to claim 13 , wherein the supporting element is oriented in a direction of displacement of the actuating unit.

16. The parking lock according to claim 15 , wherein the supporting element is connected to the parking lock housing having almost no axial play in the direction of displacement and having radial play normal to the direction of displacement.

Assignees

• Schaeffler Technologies Ag

Inventors

• Kraemer Klaus
• Feuerbach Matthias
• Rost Markus
• Heumann Tobias
• Thuerauf Christoph

Classifications

• B60T1/005

  by locking of wheel or transmission rotation · CPC title

• F16H63/3416 Primary

  Parking lock mechanisms or brakes in the transmission · CPC title

• F16H63/3483

  with hydraulic actuating means · CPC title

• F16H63/3425 Primary

  characterised by pawls or wheels · CPC title

• F16H63/3433

  Details of latch mechanisms, e.g. for keeping pawls out of engagement · CPC title