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Ball Cam Actuated Dog Clutch

A ball cam, actuated technology, used in electric clutches, mechanical drive clutches, clutches, etc., can solve the problem of not providing necessary structures

Inactive Publication Date: 2017-06-23
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A limitation of known dog clutch synchronizers and their tapered sleeves and one-way ball bearing clutches is that they only provide engagement in one direction
In applications such as the engagement of a final drive planetary gear set with a differential, known detent rings do not provide the necessary structure to allow action in the opposite direction of displacement under load

Method used

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  • Ball Cam Actuated Dog Clutch
  • Ball Cam Actuated Dog Clutch
  • Ball Cam Actuated Dog Clutch

Examples

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Embodiment Construction

[0029] The following description is merely exemplary in nature and is not intended to limit the invention, application or uses.

[0030] refer to figure 1 , shows the drive unit or transmission and is generally identified by the numeral 10 . Transmission 10 is preferably an automatic transmission of a motor vehicle (not shown). The transmission 10 includes a transmission housing or housing 12 , which may be a casting using a metal, such as aluminum. Torque from the vehicle's engine is transmitted through a series of planetary gearsets 14 to provide multiple transmission speeds. The final drive unit 16 meshes to a planetary gear set 14 , which is rotatably coupled with a differential 18 . The differential 18 rotates a shaft assembly 20 defined by a first half shaft 20a and a second half shaft 20b.

[0031] According to several aspects, the final drive unit 16 defines a planetary gear set having a ring gear 22 . Ring gear extension 24 is integrally connected to and extends ...

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PUM

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Abstract

A ball cam actuated dog clutch assembly for a motor vehicle transmission includes a clutch sleeve having a plurality of gear teeth positioned at a first end and multiple ball bearings disposed at a second end. A clutch hub having multiple helical grooves is created in an outer facing wall. Each of the helical grooves receives a portion of one of the ball bearings. An actuator member acts to rotate the clutch hub. Rotation of the clutch hub causes axial translation of the clutch sleeve in a selected one of a first direction or an opposite second direction by translation of the ball bearings within the helical grooves.

Description

technical field [0001] The present invention relates to a clutch assembly having a ball cam actuator. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may or may not constitute prior art. [0003] Conventional automatic transmissions use friction clutches in the form of band clutches or multi-plate friction clutches. Friction clutches work by pressing two plates together. Friction between clutch elements allows energy transfer by allowing one plate to spin faster than the other or allowing it to slip. Automatic transmissions use friction clutches so that shifting gears doesn't require reducing engine power. When changing gears, an automatic transmission disengages one clutch while it engages another. However, when ambient temperatures drop below freezing, and especially at temperatures approaching -40°F, the hydraulic fluid pressure required to actuate the friction clutch requires inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D11/16
CPCF16D11/14F16D28/00F16D2023/123F16D11/16
Inventor J·R·利特菲尔德P·R·加西亚
Owner GM GLOBAL TECH OPERATIONS LLC