US 12,128,530 B2
Screw device having integrated detection means
Bruno Bergmann, Gütersloh (DE); Johannes Petermann, Herzebrock-Clarholz (DE); and Achim Lübbering, Herzebrock-Clarholz (DE)
Assigned to Johannes Lübbering GmbH, Herzebrock-Clarholz (DE)
Appl. No. 17/631,671
Filed by Johannes Lübbering GmbH, Herzebrock-Clarholz (DE)
PCT Filed Jun. 18, 2020, PCT No. PCT/EP2020/066949
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/023422, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 19189731 (EP), filed on Aug. 2, 2019.
Prior Publication US 2022/0274232 A1, Sep. 1, 2022
Int. Cl. B25B 13/48 (2006.01); B25B 17/02 (2006.01); B25B 23/142 (2006.01)
CPC B25B 13/481 (2013.01) [B25B 17/02 (2013.01); B25B 23/1425 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A screwing device (10) for applying a torque to a screw partner (20), the screwing device (10) comprising
geared offset head means (1) having an output (1b) which can be connected to the screw partner (20) in a detachable manner and a drive (1a) to which a drive torque can be manually or mechanically applied, and detection means (5), provided in a housing (30) of the geared offset head means (1), for providing measurement values for determining or monitoring an output torque acting on the screw partner on the output side, wherein
the detection means (5) are configured in such a manner that they can detect a radial force or a tangential force which acts on a gearwheel (4d) which connects the drive and the output of the geared offset head means (1) in a torque-transmitting manner, and wherein the detection means (5) can provide at least one of the radial or tangential force for electronic signal evaluation, and wherein the detection means (5) comprise at least one essentially disk-shaped force transducer (5a) comprising integrated force sensor means which are configured to detect at least one of a compressive force or a pulling force applied to the force transducer (5a) in at least one of a radial direction or a tangential direction, wherein the integrated force sensor means are formed by strain gauges (12a, 12b) which are attached to the force transducer (5a) and which are disposed on opposite struts (7a, 7b) of the force transducer (5a) which extend in the radial direction, or
the integrated force sensor means are formed by a polymer mass (15a, 15b) containing graphene and having variable electrical conductivity, the polymer mass (15a, 15b) being attached to or integrated in the force transducer (5a).