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US 9,869,371 B2Granted
Automatic transmission and a dog clutch for an automatic transmission
AssigneeZF Friedrichshafen AG
InventorsNico Flemming, David Edward Drosback, Abhishek Baradwaj Raydurga Palegar, Thomas Geiss
Life of this patent
Estimating the term…
Abstract
A dog clutch for an automatic transmission is provided. The dog clutch includes a magnet that is mounted to a sliding clutch. A solenoid is positioned adjacent the magnet and is configured for selectively adjusting the dog clutch between an engaged configuration and a disengaged configuration. A related automatic transmission is also provided.
Claims16
An automatic transmission, comprising:
- a plurality of planetary gear sets;
- a plurality of shifting elements including a dog clutch, the dog clutch comprising a mating clutch mounted to a gear of the plurality of planetary gear sets,
- the mating clutch defining a plurality of projections;
- a clutch sleeve defining a plurality of projections;
- a sliding clutch defining a plurality of projections;
- a magnet mounted to the sliding clutch;
- and
- a solenoid positioned adjacent the magnet and configured for selectively adjusting the dog clutch between an engaged configuration and a disengaged configuration, the solenoid positioning the sliding clutch such that the plurality of projections of the sliding clutch mesh with both the plurality of projections of the mating clutch and the plurality of projections of the clutch sleeve in the engaged configuration, the solenoid positioning the sliding clutch such that the plurality of projections of the sliding clutch does not mesh with the plurality of projections of the mating clutch in the disengaged configuration,
- wherein the sliding clutch extends between a first end portion and a second end portion, the sliding clutch having a support positioned at the first end portion of the sliding clutch and a hollow post positioned at the second end portion of the sliding clutch, the plurality of projections of the sliding clutch positioned on the support of the sliding clutch at an outer surface of the sliding clutch, the magnet disposed within the hollow post at a distal end portion of the hollow post, and
- wherein the hollow post of the sliding clutch comprises a non-ferrous material.
7 more elements
A dog clutch for an automatic transmission, comprising:
- a mating clutch defining a plurality of projections at an inner surface of the mating clutch;
- a clutch sleeve defining a plurality of projections at an inner surface of the clutch sleeve;
- a sliding clutch defining a plurality of projections at an outer surface of the sliding clutch;
- a magnet mounted to the sliding clutch;
- and
- a solenoid positioned adjacent the magnet and configured for selectively adjusting the dog clutch between an engaged configuration and a disengaged configuration, the solenoid positioning the sliding clutch such that the plurality of projections of the sliding clutch mesh with both the plurality of projections of the mating clutch and the plurality of projections of the clutch sleeve in the engaged configuration, the solenoid positioning the sliding clutch such that the plurality of projections of the sliding clutch does not mesh with the plurality of projections of the mating clutch in the disengaged configuration,
- wherein the sliding clutch extends between a first end portion and a second end Portion, the sliding clutch having a support positioned at the first end portion of the sliding clutch and a hollow post positioned at the second end portion of the sliding clutch, the plurality of projections of the sliding clutch positioned on the support of the sliding clutch at an outer surface of the sliding clutch, the magnet disposed within the hollow post at a distal end portion of the hollow post, and
- wherein the hollow post of the sliding clutch comprises a non-ferrous material.
5 more elements
Dependencies are inferred from the claim text.