US 12,332,139 B2
Rotary encoder and a method for determining malfunction of a rotary encoder
Mats Gustafsson, Stallarholmen (SE); Martin Lundgren, Strängnäs (SE); and Robin Johansson, Strängnäs (SE)
Assigned to LEINE & LINDE AB, Strängnäs (SE)
Filed by LEINE & LINDE AB, Strängnäs (SE)
Filed on Mar. 10, 2023, as Appl. No. 18/119,900.
Claims priority of application No. 22162259 (EP), filed on Mar. 15, 2022.
Prior Publication US 2023/0296477 A1, Sep. 21, 2023
Int. Cl. G01D 18/00 (2006.01); G01D 5/347 (2006.01); G01M 13/04 (2019.01); G08B 21/18 (2006.01)
CPC G01M 13/04 (2013.01) [G01D 5/3473 (2013.01); G08B 21/187 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotary encoder, comprising:
a shaft including a bearing configuration internally connected to an axial bushing arranged in a housing, the shaft being rotatable relative to the housing via the bearing configuration;
a rotor attached to the shaft;
a stator; and
malfunction determination device adapted to determine a malfunction of the bearing configuration, the malfunction determination device including a detection device and a connection device, the detection device adapted to determine whether the connection device is operably connected between a fixed portion of the rotary encoder and the bushing and to output a status of the connection between the fixed portion of the rotary encoder and the bushing to a control device via a communication link, the detection device being adapted to determine a rotation of the bushing associated with the malfunction of the bearing configuration in response to there being no connection between the fixed portion of the rotary encoder and the bushing.