Parking lock for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10962113-B2
Application number	US-201716332955-A
Country	US
Kind code	B2
Filing date	Nov 20, 2017
Priority date	Nov 25, 2016
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A parking lock (1) for a motor vehicle, wherein the parking lock (1) has a housing (21), a locking pawl (4) which is arranged such that it can be pivoted about a rotational axis (a) and has a pawl tooth (5) which is configured for engaging in a positively locking manner into a parking lock gear, an actuator (6) for actuating the locking pawl (4), with the result that it can be brought reversibly into engagement with the parking lock gear by way of the pawl tooth (5) of the locking pawl (4), and a movable transmission element which transmits the movement of the actuator (6) to the locking pawl (4). The parking lock (1) has a damping mechanism for the locking pawl or for the movable transmission element.

First claim

The invention claimed is:

1. A parking lock for a motor vehicle, the parking lock comprising:
a housing;
a locking pawl arranged to pivot about an axis of rotation relative to the housing, the locking pawl including a pawl tooth constructed for positive-fit engagement in a parking lock gear;
an actuator that actuates the locking pawl, so that the locking pawl is movable into reversible engagement with the parking lock gear with said pawl tooth;
a moving transmission mechanism that transfers movement of the actuator to the locking pawl; and
a spring assembly that acts as a stop for the locking pawl or for the moving transmission mechanism,
wherein the spring assembly is located between a slide and the housing.

2. The parking lock according to claim 1 , wherein the moving transmission mechanism includes a roller that transfers the movement of the actuator to the locking pawl.

3. The parking lock according to claim 1 , wherein the moving transmission mechanism has the slide that is displaceable in a linear fashion.

4. The parking lock according to claim 3 , wherein a distance of the slide from the spring assembly in a locked state of the parking lock is less than twice a width of the pawl tooth.

5. The parking lock according to claim 1 , wherein the spring assembly is arranged between the moving transmission mechanism and the housing.

6. The parking lock according to claim 1 , wherein the spring assembly has two or more spring plates arranged one behind the other.

7. The parking lock according to claim 6 , wherein at least two of the spring plates have a same shape and are arranged one directly behind the other.

8. The parking lock according to claim 6 , wherein at least one of the spring plates has a shape deviating from one of the other spring plates.

9. The parking lock according to claim 6 , wherein the spring plates are coated with friction material.

10. The parking lock according to claim 6 , wherein the spring plates are spaced apart from each other by spring gaps.

11. A parking lock for a motor vehicle, the parking lock comprising:
a housing;
a locking pawl arranged to pivot about an axis of rotation relative to the housing, the locking pawl including a pawl tooth constructed for positive-fit engagement in a parking lock gear;
an actuator that actuates the locking pawl, so that the locking pawl is movable into reversible engagement with the parking lock gear with said pawl tooth, the actuator including an actuator shaft that is rotatable about an actuator axis;
a moving transmission mechanism that transfers movement of the actuator to the locking pawl, the moving transmission mechanism including a crank connected to the actuator shaft, a slide that drives the locking pawl, and a connecting rod connecting the crank to the slide; and
a spring assembly that acts as a stop for the locking pawl or for the moving transmission mechanism,
wherein slide is displaceable in a linear fashion and
a distance of the slide from the spring assembly in a locked state of the parking lock is less than twice a width of the pawl tooth.

12. The parking lock according to claim 11 , further comprising a roller located on the slide that transfers movement of the actuator to the locking pawl.

13. The parking lock according to claim 11 , wherein the spring assembly is located between the slide and the housing.

14. The parking lock according to claim 13 , wherein the spring assembly comprises two or more spring plates.

15. The parking lock according to claim 13 , wherein at least two of the spring plates have a same shape and are arranged one directly behind the other.

16. The parking lock according to claim 15 , wherein the spring plates are coated with friction material.

17. The parking lock according to claim 15 , wherein the spring plates are spaced apart from each other by spring gaps.

18. A parking lock for a motor vehicle, the parking lock comprising:
a housing;
a locking pawl configured to pivot relative to the housing;
an actuator that actuates the locking pawl;
a moving transmission mechanism that transfers movement of the actuator to the locking pawl, the moving transmission mechanism including a rod enclosed by a compression spring that pretensions the locking pawl; and
a spring assembly separate from the compression spring that acts as a stop for the moving transmission mechanism.

Assignees

• Schaeffler Technologies Ag

Inventors

• Kramer Klaus
• Feuerbach Matthias
• Rost Markus
• Heumann Tobias

Classifications

• F16D63/006

  Positive locking brakes · CPC title

• F16H63/3416 Primary

  Parking lock mechanisms or brakes in the transmission · CPC title

• F16H63/3425 Primary

  characterised by pawls or wheels · CPC title

• B60T1/005

  by locking of wheel or transmission rotation · CPC title