Patent ID: 7770461

Claim:
Device for measuring the brake torque in a vehicle undercarriage in which the brake torque is transmitted to said vehicle undercarriage by a bar-shaped member, said bar-shaped member being loaded transversely by said brake torque, and measuring means being provided which are operatively connected mechanically to said bar-shaped member, said measuring means allowing a measurement of the strain or contraction of said bar-shaped member that is caused by said transverse load, wherein said bar-shaped member has an interior which is essentially hollow and said measuring means are located in the interior of said bar-shaped member, wherein said measuring means detect an elongation in a measuring direction and at least two of them at a time are mutually aligned with their measuring directions such that the signals of said measuring means are additively or subtractively combinable into respective total signals, the total signal that may result from the transverse load during a brake application being greater than that of the individual measuring means while the total signal that may result from other transverse loads is a smaller signal than that of an individual measuring means, wherein the measuring directions of two of said measuring means are arranged at an angle of essentially 90°, and wherein said measuring means are located in an enclosure of a sensor that is inserted into a cavity of said bar-shaped member for extending into said cavity, at least a part of said enclosure being mechanically operatively connected to said bar-shaped member and said measuring means being mechanically operatively connected to said enclosure such that an oval deformation of said bar shaped-member is transmittable via said enclosure to said measuring means, wherein said enclosure deforms in conformity to said oval deformation of said bar-shaped member.