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Manufacture of clutch components

A technology of auto parts and blanks, which is applied in the field of one-way clutches, and can solve problems such as clutch component failure and easy diffusion

Inactive Publication Date: 2008-06-11
BURGESS NORTON MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This untempered martensitic region on the backing face of a clutch component can be the initial site of a brittle fracture, which can easily propagate, thereby causing eventual clutch component failure

Method used

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  • Manufacture of clutch components
  • Manufacture of clutch components

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] 1-5 of the drawings, there is shown an exemplary clutch assembly 10 including a driving member 12 and a driven member 14 , both rotatable about a common normal axis 16 , in accordance with an embodiment of the present invention. The example clutch assembly 10 also includes a plurality of struts 18 disposed between the drive member 12 and the driven member 14 . The strut 18 functions to mechanically connect the driving member 12 with the driven member 14 only when the driving member 12 is rotated in the first direction relative to the driven member 14 . Such a structure is typically called a one-way clutch.

[0017] More specifically, in the exemplary clutch assembly 10 , the drive member 12 has a clutch face 22 that defines a first reference surface 24 that extends generally perpendicular to the axis of rotation 16 of the drive member. A plurality of recessed portions are defined in the clutch face 22 of the drive member 12, each recessed portion comprising a load shou...

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Abstract

Clutch components for automotive use usually include a pair of clutch members with operative faces. In particular, planar one way clutches include a pair of clutch members whose operative faces are enclosed spaced opposition, with each clutch face including a plurality of recessed defining respective load bearing shoulders. A plurality of struts are disposed between the coupling face of the members, and such struts are moveable between the coupling position and non coupling position. A preferable method of manufacturing such clutch components includes powder metal operations comprising die compacting a metal powder into a metal blank, sintering the metal blank to form a sintered metal blank, and cooling the sintered metal blank to form a cooled metal blank. The preferred metallic structure of the cooled metal blank is 50-80% martensite and 20-50% bainite and fine pearlite. The application is especially useful for clutches used as backing plates in clutch brake applications.

Description

technical field [0001] This invention relates to automotive clutch or transmission components, and more particularly to so-called one-way clutches in which one or more struts are mechanically connected between opposing clutch faces and a pair of coaxially rotatable members. Background technique [0002] In such a one-way clutch, a driving member engages a driven member as described in US Patent 6,571,926. [0003] A thin, flat strut is carried in a pocket of each drive member such that the first longitudinal end can easily engage and bear against a shoulder defined by a corresponding recess in the drive member. The second, opposite longitudinal end of the strut is urged toward and against the driven member by spring force, thereby contacting a complementary surface on the driven member. [0004] The materials and processing of such clutch components use highly hardenable metals to manufacture the clutch components. Such materials could be used as back plates in automotive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F1/00
CPCB22F5/08B22F2998/10B22F2999/00C22C38/12C22C38/08C22C38/16C22C33/0207C22C33/0264B22F5/106B22F3/02B22F2203/13B22F3/10B22F2203/11B22F1/10B22F3/12
Inventor J·R·恩奎斯特M·R·哈斯
Owner BURGESS NORTON MFG
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