Arrangement of a parking lock in a vehicular transmission

Patent metadata

Field	Value
Publication number	US-11273802-B2
Application number	US-201916518101-A
Country	US
Kind code	B2
Filing date	Jul 22, 2019
Priority date	Jul 23, 2018
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A parking lock in a vehicle transmission includes a locking mechanism for locking and releasing a parking interlock gear ( 1 ) and an actuating unit. The actuating unit is coupled via a coupling mechanism to the locking mechanism in order to actuate the locking mechanism between an interlock position and a release position of the parking interlock gear ( 1 ). The parking lock is arranged on an intermediate plate ( 2 ) in a housing of the vehicle transmission.

First claim

The invention claimed is:

1. An arrangement of a parking lock in a vehicle transmission, wherein the parking lock comprises:
a locking mechanism for locking and releasing a parking interlock gear ( 1 ); and
an actuating unit coupled to the locking mechanism via a coupling mechanism in order to actuate the locking mechanism between an interlock position and a release position of the parking interlock gear ( 1 ),
wherein the parking lock is arranged on an intermediate plate ( 2 ) in a housing of the vehicle transmission,
wherein a parking lock cylinder ( 3 ) of the actuating unit is arranged in a recess ( 4 ) of the intermediate plate ( 2 ),
wherein a connecting rod ( 5 ) of the locking mechanism extends through a passage opening ( 6 ) of the intermediate plate ( 2 ),
wherein the connecting rod ( 5 ) engages into a housing-affixed guide sleeve ( 8 ) with an interlocking element ( 7 ) in order to actuate a locking pawl ( 9 ) of the parking interlock gear ( 1 ),
wherein the interlocking element ( 7 ) is axially movably mounted on the connecting rod ( 5 ), and
wherein a longitudinal axis ( 10 ) of the parking lock cylinder ( 3 ) and a longitudinal axis ( 11 ) of the connecting rod ( 5 ) of the locking mechanism extend approximately axially parallel to each other and are aligned approximately perpendicularly to the intermediate plate ( 2 ).

2. An arrangement of a parking lock in a vehicle transmission, wherein the parking lock comprises:
a locking mechanism for locking and releasing a parking interlock gear ( 1 ); and
an actuating unit coupled to the locking mechanism via a coupling mechanism in order to actuate the locking mechanism between an interlock position and a release position of the parking interlock gear ( 1 ),
wherein the parking lock is arranged on an intermediate plate ( 2 ) in a housing of the vehicle transmission,
wherein a parking lock cylinder ( 3 ) of the actuating unit is arranged in a recess ( 4 ) of the intermediate plate ( 2 ),
wherein a connecting rod ( 5 ) of the locking mechanism extends through a passage opening ( 6 ) of the intermediate plate ( 2 ),
wherein the connecting rod ( 5 ) engages into a housing-affixed guide sleeve ( 8 ) with an interlocking element ( 7 ) in order to actuate a locking pawl ( 9 ) of the parking interlock gear ( 1 ),
wherein the interlocking element ( 7 ) is axially movably mounted on the connecting rod ( 5 ), and
wherein a longitudinal axis ( 10 ) of the parking lock cylinder ( 3 ) and a longitudinal axis ( 11 ) of the connecting rod ( 5 ) extend approximately axially parallel to a swivel axis ( 12 ) of the locking pawl ( 9 ) of the parking interlock gear ( 1 ).

3. An arrangement of a parking lock in a vehicle transmission, wherein the parking lock comprises:
a locking mechanism for locking and releasing a parking interlock gear ( 1 ); and
an actuating unit coupled to the locking mechanism via a coupling mechanism in order to actuate the locking mechanism between an interlock position and a release position of the parking interlock gear ( 1 ),
wherein the parking lock is arranged on an intermediate plate ( 2 ) in a housing of the vehicle transmission,
wherein a parking lock cylinder ( 3 ) of the actuating unit is arranged in a recess ( 4 ) of the intermediate plate ( 2 ),
wherein a connecting rod ( 5 ) of the locking mechanism extends through a passage opening ( 6 ) of the intermediate plate ( 2 ),
wherein the connecting rod ( 5 ) engages into a housing-affixed guide sleeve ( 8 ) with an interlocking element ( 7 ) in order to actuate a locking pawl ( 9 ) of the parking interlock gear ( 1 ),
wherein the interlocking element ( 7 ) is axially movably mounted on the connecting rod ( 5 ),
wherein an end of an actuating piston ( 13 ) of the parking lock cylinder ( 3 ) is coupled to a first end of a two-sided lever ( 14 ) of the coupling mechanism arranged on a selector shaft ( 36 ) of the coupling mechanism, and
wherein an end of the connecting rod ( 5 ) is coupled to a second end of the two-sided lever ( 14 ) of the coupling mechanism.

4. The arrangement of claim 3 , wherein the selector shaft ( 36 ) is aligned approximately parallel to the intermediate plate ( 2 ) and is mounted to the intermediate plate ( 2 ) with holding straps ( 38 ).

5. The arrangement of claim 3 , wherein the parking lock cylinder ( 3 ) is connected to an oil duct ( 18 ) in the intermediate plate ( 2 ) for actuating the actuating piston ( 13 ), and the oil duct ( 18 ) opens into the parking lock cylinder ( 3 ) via an oil delivery port ( 17 ).

6. The arrangement of claim 3 , wherein a parking lock detent unit is provided with an intermediate plate-side latch ( 20 ) on the intermediate plate ( 2 ).

7. The arrangement of claim 6 , wherein the parking lock detent unit comprises a one-sided lever ( 19 ) connected to the selector shaft ( 36 ) in a rotationally fixed manner, and the end of the one-sided lever ( 19 ) is fixable in the intermediate plate-side latch ( 20 ) in order to fix a predetermined parking lock position.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Hanker Gert
• Michel Christian

Classifications

• B60T1/005 Primary

  by locking of wheel or transmission rotation · CPC title

• F16H63/3433 Primary

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

• F16D63/006

  Positive locking brakes · CPC title

• B60T1/062

  acting on transmission parts · CPC title

• F16H63/3483

  with hydraulic actuating means · CPC title