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Improved Design From Minnesota Rubber

By Design World Staff | February 23, 2011

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Variable speed clutch control devices molded of PEEK change clutch gear ratio more efficiently and are more durable than earlier designs molded and machined of a low performing thermostat material. The PEEK design from Minnesota Rubber and Plastics (MR&P) improves clutch operation while adding to clutch longevity.

 Clutch control assemblies

Clutch control assemblies take a beating. Off-highway vehicle designers are constantly seeking new materials that enhance performance while reducing costs for these clutch assemblies. So by improving the design and going to PEEK (Polyetheretherketone), MR&P reduced friction, improved clutch performance and extended operating life.

Three of these control switch buttons are utilized in each clutch assembly. They are aligned with each other and slide up and down on an incline plane in the clutch. During alternating up/down sequences, the switch buttons carry the full torque load of the clutch. As the torque requirements for the clutch change, the three PEEK switch buttons slide on the incline plane activating a disc that changes the gear ratio of the clutch. This alternating motion during vehicle operation puts a heavy stress load on the clutch and all of its components, particularly the sliding switch buttons.

MR&P’s switch to PEEK gives the control switch buttons added strength, durability and high temperature capability compared to the previous design. PEEK’s polymer flexibility enhances the control switch buttons compression efficiency and avoids temperature buildup. Also, the PEEK components have minimal moisture absorption, so if the clutch assemblies become wet, the control switch buttons retain shape, won’t corrode and maintain close tolerances for continued reliable performance.

Minnesota Rubber and Plastics
www.mnrubber.com

::Design World::


Filed Under: Brakes • clutches, Materials • advanced, Mechanical

 

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