Gear arrangement having a magnetic toothed disk

• US 5,771,745 A
• Filed: 05/02/1996
• Issued: 06/30/1998
• Est. Priority Date: 05/10/1995
• Status: Expired due to Fees

• Current Assignee: Volkswagen AG
• Original Assignee: Volkswagen AG
• Inventors: Goebbels, Helmut, Goette, Timo
• Primary Examiner(s): Marmor, Charles A.
• Assistant Examiner(s): GRABOW, TROY E
• Application Number:
  US08/641,824
• Time in Patent Office: 789 Days
• Field of Search: 74/409, 74/440, 74/443, 74/DIG. 4, 74/DIG. 10
• US Class Current: 74/440
• CPC Class Codes: F16H 57/0006 Vibration-damping or noise reducing means specially adapted for gearings devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183
• CPC Class Codes: Y10S 74/04 Magnetic gearing
• CPC Class Codes: Y10T 74/19898 Backlash take-up
• CPC Class Codes: Y10T 74/19907 Sound deadening

Abstract

A gear arrangement which prevents clattering or rattling noises associated with the engagement of gear teeth with another gear includes a gear and a magnetic toothed disk engaging one side of the gear and having the same diameter as the gear and a different number of teeth than the gear.

Claims

1. A gear arrangement comprising a gear having a number of teeth and a magnetic toothed disk disposed on one side of the gear and magnetically attracted thereto to provide frictional engagement therewith to resist relative rotation and having the same outer diameter as that of the gear and having a number of teeth which differs from the number of teeth of the gear and wherein the toothed disk has at least one tooth fewer than the gear in order to cause the teeth of the gear and of the disk to remain in contact with teeth of another gear engaging them.

2. A gear arrangement according to claim 1 including a gear shaft to which the gear is fixedly attached.

3. A gear arrangement according to claim 1 wherein the gear has an offset hub and wherein the toothed disk is supported on the offset hub.

4. A gear arrangement according to claim 1 wherein the toothed disk is retained against the side of the gear by a securing element.

5. A gear arrangement according to claim 1 wherein the gear is a helical toothed gear and the toothed disk is disposed on the pressure side of the gear.

6. A gear arrangement according to claim 1 wherein the toothed disk consists of a nonmagnetic material containing at least one magnetic segment.