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US 4,788,856 AGranted
Method and apparatus for checking differential gear assemblies
AssigneeDana Corporation
InventorNed D. Felger
Life of this patent
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AssigneeDana Corporation
InventorNed D. Felger
Estimating the term…
An apparatus and a method for checking differential gear assemblies during manufacture positions each gear assembly mounted in a differential housing in a tray. The differential housing is oriented by prelocators and lifted into engagement with a bottom surface of a bed plate. Proximity switches mounted in the bed plate generate a position signal which actuates a compound slide to engage a brake with an output of the gear assembly. When the brake has been applied, a drive motor is actuated and moved into engagement with an input of the gear assembly to verify lockup. The motor is increased in speed, the brake is released after a predetermined time and the gear ratio of the gear assembly is determined during revolutions of free wheeling. The steps are replaced for a reverse direction of rotation of the motor and then the motor is run at low torque to sense torque to rotate and first resistance for calculating backlash. The motor is indexed one hundred eighty degrees to determine backlash before the slide is retracted and the housing is lowered back to the starting position.
An apparatus for checking a gear assembly, comprising:
A method of checking a gear assembly comprising the steps of:
An apparatus for checking a gear assembly, comprising:
Dependencies are inferred from the claim text.