US 11,772,938 B2
Speed monitoring device of a passenger transportation system
Michael Berger, Königstetten (AT); Dirk Mark Blondiau, Vienna (AT); and Gerhard Stoiber, Zistersdorf (AT)
Assigned to INVENTIO AG, Hergiswil (CH)
Appl. No. 17/777,950
Filed by INVENTIO AG, Hergiswil (CH)
PCT Filed Nov. 10, 2020, PCT No. PCT/EP2020/081669
§ 371(c)(1), (2) Date May 18, 2022,
PCT Pub. No. WO2021/099187, PCT Pub. Date May 27, 2021.
Claims priority of application No. 19209772 (EP), filed on Nov. 18, 2019.
Prior Publication US 2022/0402729 A1, Dec. 22, 2022
Int. Cl. B66B 25/00 (2006.01)
CPC B66B 25/006 (2013.01) [B66B 25/003 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A speed monitoring device for measuring a rotational frequency or rotational speed of a main drive shaft of a passenger transportation system, the speed monitoring device comprising:
at least one rotational speed sensor having an input shaft;
a tapping device configured such that it can be arranged on a shaft casing surface of the main drive shaft of the passenger transportation system, the rotational frequency of which is to be measured; and
a bracket for fixedly attaching the rotational speed sensor relative to an axis of rotation of the tapping device,
the speed monitoring device further comprising a pinion which is mechanically connected to the input shaft so that a rotation of the pinion is transmitted to the input shaft;
the tapping device having a gearing which can be coupled to the pinion in a rotation-transmitting manner; and
the pinion being rotatably mounted in the bracket at two bearing areas;
wherein the tapping device is configured to be attached to a side flank of a shaft shoulder of the main drive shaft; and
wherein a torsionally rigid, flexible clutch is provided between the pinion and the input shaft.