Universal segmented friction clutch facing

• US 5,460,255 A
• Filed: 03/25/1993
• Issued: 10/24/1995
• Est. Priority Date: 03/25/1993
• Status: Expired due to Term

• Current Assignee: Borg-Warner Automotive Incorporated (BorgWarner Incorporated)
• Original Assignee: Borg-Warner Automotive Incorporated (BorgWarner Incorporated)
• Inventors: Quigley, James R.
• Primary Examiner(s): Pitts, Andrea L.
• Application Number:
  US08/037,569
• Time in Patent Office: 943 Days
• Field of Search: 192/70.12, 192/70.14, 192/107 R, 192/113 LC, 192/113 BG, 188/264 D, 188/264 E
• US Class Current: 192/113.36
• CPC Class Codes: F16D 13/648 for clutches with multiple lamellae
• CPC Class Codes: F16D 13/72 Features relating to cooling
• CPC Class Codes: F16D 13/74 Features relating to lubrication
• CPC Class Codes: F16D 2069/004 Profiled friction surfaces, e.g. grooves, dimples
• CPC Class Codes: F16D 65/122 adapted for mounting of friction pads
• CPC Class Codes: F16D 65/128 characterised by means for cooling
• CPC Class Codes: F16D 69/0408 specially adapted for plane linings

Abstract

A wet-type friction clutch having universally shaped friction segments manufactured from a nearly scrapless process. Relative juxtaposition of the segments will achieved desired amounts of cooling fluid flow into and out of the friction discs with corresponding desired levels of hydrostatic pressure buildup between the discs.

Claims

1. A friction disc for use with a wet-type multi-plate clutch with cooling fluid for selectively transmitting driving forces from an engine to a road wheel comprising:

an annular core plate having opposed flat annular surfaces; and

,

a plurality of friction segments adhered to said opposed flat surfaces and spaced at predetermined intervals, said friction segments defining discrete friction surfaces and gaps located between said discrete friction surfaces, said friction segments having a generally triangular shape and said gaps between said triangular friction segments are alternating between a generally straight gap formed by generally parallel edges of said friction segments and radially expansive gaps in the outward direction, said friction segments being juxtaposed such that cooling fluid flows at a desired rate and in a desired direction as said friction disc rotates and further to effect the development of a desired level of hydrostatic pressure between adjacent friction discs within said clutch, wherein the relative juxtaposition of said friction segments effects desired alterations in the rate of cooling fluid flow through said gap.

2. The friction disc of claim 1, whereby rotation of said disc in one direction creates a full flow of cooling fluid through said gaps and rotation of said disc in the opposed direction creates cooling fluid flow through said parallel gaps and cooling fluid flow impedance in said expansive gaps to create required hydrostatic pressure.

3. A friction disc for use with a wet-type clutch with cooling fluid, comprising:

an annular core plate having opposed annular surfaces; and

a plurality of discrete friction segments affixed to at least one surface of said core plate at spaced intervals, each of said friction segments being formed from a continuous strip of friction material and having a triangular shape, each of said segments defining a discrete friction surface and having at least one edge positioned proximate an edge of an adjacent segment, wherein said edge positioned proximate an edge of an adjacent segment of each of said friction segments as affixed to the annular surface defines a gap with said adjacent edge of an adjacent friction segment, said gaps between said triangular friction segments alternating in shade between a generally straight gap and a generally radially expensive gap in the outward direction.

4. The friction disc of claim 3, wherein said gaps defined by adjacent friction segments provide fluid flow therethrough at a desired rate and in a desired direction as said friction disc rates to effect cooling of said friction disc and further to effect the development of a desired level of hydrostatic pressure between adjacent friction discs, wherein such rate and direction of fluid flow through said gap and the level of hydrostatic pressure created in said gap are variable and dependent upon the relative juxtaposition of said friction segments on said annular core plate.