US 12,252,924 B2
Belt tensioning system
Roger Dreyer, Bjarred (SE); and Simon Onnered, Lund (SE)
Assigned to Assa Abloy Entrance Systems AB, Landskrona (SE)
Appl. No. 18/007,801
Filed by Assa Abloy Entrance Systems AB, Landskrona (SE)
PCT Filed Jun. 3, 2021, PCT No. PCT/EP2021/064904
§ 371(c)(1), (2) Date Dec. 2, 2022,
PCT Pub. No. WO2021/245188, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 2030186-7 (SE), filed on Jun. 4, 2020.
Prior Publication US 2023/0220718 A1, Jul. 13, 2023
Int. Cl. E05F 15/643 (2015.01)
CPC E05F 15/643 (2015.01) [E05Y 2201/638 (2013.01); E05Y 2201/672 (2013.01); E05Y 2900/132 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A belt tensioning system (170) for tensioning a belt (171) of a belt drive system (970) for transferring torque from a drive unit (112) of a door operating system (100) to a sliding door leaf (101) of a sliding door assembly (200), the belt tensioning system comprising:
a belt wheel (176) connectable to the belt (171) for torque transfer between said belt wheel (176) and an additional belt wheel (175) of the belt drive system (970);
a belt wheel guiding arrangement (330), the belt wheel (176) being movably connected to said belt wheel guiding arrangement (330); and
a belt tensioning arrangement (470) operatively connecting the belt wheel (176) and the belt wheel guiding arrangement (330) for adjusting the position of the belt wheel (176) relative the belt wheel guiding arrangement (330),
wherein the belt tensioning arrangement (470) comprises an engagement member (340) and a tensioning member (370), whereby the engagement member (340) comprises an eccentric cam structure (341) and the tensioning member (370) is arranged to engage said eccentric cam structure (341) of the engagement member (370), the engagement member (340) and the tensioning member (370) being adjustable relative each other to adjust the position of the belt wheel (176) relative the belt wheel guiding arrangement (330), and wherein the engagement member (340) is mounted to the belt wheel (176) and the belt wheel (176) is rotatable relative said engagement member (340).