US 12,366,289 B2
Eddy current damper for power take-off gear rattle abatement
Derek E. Muff, Memphis, TN (US); Bradley A. Slakans, Collierville, TN (US); and Steven Wesley Bennett, Noblesville, IN (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
Filed on Jun. 26, 2020, as Appl. No. 16/912,839.
Claims priority of provisional application 62/868,466, filed on Jun. 28, 2019.
Prior Publication US 2020/0408276 A1, Dec. 31, 2020
Int. Cl. F16H 57/00 (2012.01); B60K 17/28 (2006.01); B60K 25/02 (2006.01); B60K 25/06 (2006.01); F16F 15/03 (2006.01); F16F 15/18 (2006.01); F16H 1/04 (2006.01)
CPC F16H 57/0006 (2013.01) [B60K 17/28 (2013.01); B60K 25/02 (2013.01); B60K 25/06 (2013.01); F16F 15/035 (2013.01); F16F 15/18 (2013.01); F16H 1/04 (2013.01); B60K 2025/022 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power take-off that is adapted to be supported on and rotatably driven by a source of rotational energy so as to rotatably drive a rotatably driven accessory, the power take-off comprising:
a hollow housing including a mounting surface that is adapted to be supported on the source of rotational energy, the mounting surface having an opening therethrough;
an input mechanism supported for rotation within the hollow housing and including an input gear that extends through the opening outwardly from the hollow housing and that is adapted to be engaged and rotatably driven by the source of rotational energy;
an output mechanism supported for rotation within the hollow housing and including an output shaft that is adapted to rotatably drive the rotatably driven accessory;
a clutch assembly for selectively connecting the output mechanism and the input mechanism for concurrent rotation, the clutch assembly including a first gear that is connected for rotation with the input mechanism, a second gear that is connected for rotation with the output mechanism, and a shifter assembly that is operable in either an engaged condition, wherein the first gear and the second gear are connected for concurrent rotation, or a disengaged condition, wherein the first gear and the second gear are not connected for concurrent rotation; and
an eddy current damper structured and configured to exert a drag torque on either or both of the input mechanism and the output mechanism during operation of the power take-off while the clutch assembly is in the disengaged condition to abate rattling between the first gear and the second gear, wherein the eddy current damper includes:
(1) a ring that is connected to the input mechanism for concurrent rotation and an electromagnetic coil that is supported on the hollow housing of the power take-off; and/or
(2) a disk that is connected to the input mechanism for concurrent rotation and a permanent magnet that is supported on the hollow housing of the power take-off.