Schaeffler has been granted a patent for a slip clutch device for electric driving machines. The device includes a torque-limiting slip clutch with an electrical insulation element to prevent disruptive discharge. The friction disc or plate is made of insulating material to ensure safe operation. GlobalData’s report on Schaeffler gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Schaeffler, Crankshaft ball bearings was a key innovation area identified from patents. Schaeffler's grant share as of February 2024 was 32%. Grant share is based on the ratio of number of grants to total number of patents.

Slip clutch device for electric driving machine with insulation element

Source: United States Patent and Trademark Office (USPTO). Credit: Schaeffler AG

A slip clutch device for an electric driving machine has been granted a patent (Publication Number: US11920648B2). The device includes a rotation axis, a first side with a first spline for a shaft, a second side with a second spline for another shaft, and a slip clutch with a friction disc and plate. The unique feature of this device is the use of electrically insulating material in the friction disc or plate to prevent electrical disruptive discharge lines between the two sides.

Additionally, the patent includes claims for the entirety of the friction plate being made from electrically insulating material, the use of an axially acting disc spring for pressing the friction plate against the disc, and a form-fitting connection between the plate and the second side. The slip clutch device is designed to transmit torque up to an overload torque while also preventing electrical disruptive discharge lines. The patent also covers the application of this slip clutch device in a drive train for an electric driving machine and a motor vehicle with at least one drive wheel that is driveable by the drive train.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.