Force or torque measuring device for a motorized vehicle with an attachment

A measuring device (42, 43, 44) for measuring forces or torques between a motorized vehicle (1) and an attachment towed or pushed thereby, the measuring device (42, 43, 44) comprising:

• a carrier (20, 31, 45);
• an evaluation device (40);
• and
• at least three sensor elements (22, 34, 47) arranged on the carrier (20, 31, 45), transversely with respect to a virtual longitudinal axis of the motorized vehicle (1) and spaced apart from one another,
• wherein the measuring device (42, 43, 44) is arranged in a coupling region between the motorized vehicle (1) and the attachment,
• and wherein the sensor elements (22, 34, 47) are connected to the evaluation device (40) and configured to transmit measured values, the evaluation device (40) being configured to convert the measured values into signals for displaying at least one quantity representing a force or a torque according to magnitude and direction,
• wherein the carrier (20) is a measuring plate,
• wherein the at least three sensor elements are four sensor elements (22) in the form of load cells, strain gauges or SAW elements as force sensors and are arranged on the carrier (20) spaced apart in a square or in a rectangle,
• wherein the four sensor elements (22) are fastened to a screw-on receptacle (6) of the motorized vehicle (1) via the carrier (20) and are operatively connected to a standard suspension frame (8) to generate signals for the evaluation device (40), the signals being representative of stress on the standard suspension frame (8) or of a load on the trailer or of the attachment.

A measuring device (42, 43, 44) for measuring forces or torques between a motorized vehicle (1) and an attachment towed or pushed thereby, the measuring device (42, 43, 44) comprising:

• a carrier (20, 31, 45);
• an evaluation device (40);
• and
• at least three sensor elements (22, 34, 47) arranged on the carrier (20, 31, 45), transversely with respect to a virtual longitudinal axis of the motorized vehicle (1) and spaced apart from one another,
• wherein the measuring device (42, 43, 44) is arranged in a coupling region between the motorized vehicle (1) and the attachment,
• and wherein the sensor elements (22, 34, 47) are connected to the evaluation device (40) and configured to transmit measured values,
• the evaluation device (40) being configured to convert the measured values into signals for displaying at least one quantity representing a force or a torque according to magnitude and direction,
• wherein the at least three sensor elements are four sensor elements (34) in the form of load cells, strain gauges or SAW elements as force sensors are arranged on four spokes (32) which are offset by approximately 90° with respect to one another and extend radially from a central cylindrical hub (33),
• in that the spokes (32) are coupled to a carrier (31) in the form of a measuring plate in a frictionally locking, positively locking or materially joined fashion,
• wherein the carrier (31) is clamped in, together with an adapter plate (35) to which the central cylindrical hub (33) is coupled in a positively locking fashion or materially joined fashion, between a screw-on plate (28, 30) of a standard hitch (27, 29) and a standard coupling carrier (26).