Harvesting machine intended for harvesting grapes, including: - a chassis mounted on at least one train of wheels which are each movable about a wheel-train axle , said chassis being arranged so as to straddle a row of vines during a mechanical harvest, - a vine-row shaker assembly in mechanical connection with the chassis, capable of separating the grape harvest from the vine row, - an assembly for collecting the harvest from the shaking assembly and conveying it to one or more storage bins , the storage bins each being attached to an associated bin seat mounted pivotally around a bin pivot shaft mechanically connected to the chassis to ensure emptying of the storage bins, and - a measuring device for harvest weight accumulated in the storage bins, the harvesting machine being characterised in that: - each storage bin is connected to the associated bin seat via load sensors , the load sensors being elongate flexion sensors each including two attachment ends (132-1, 132-2), a first attachment end (132-1) being attached to the storage bin and a second attachment end (132-2) being attached to the associated bin seat so that the storage bin is suspended from the associated bin seat , - the fastening ends (132-1, 132-2) of the load sensors are disposed above the shaking assembly when the machine is located on a horizontal flat floor, - each load sensor is supplied by the harvest weight measuring device to deliver a sensor signal (401 to 408) at any time during the mechanical harvest, and - the measuring device is configured to process the signals (401 to 408) of the load sensors and to continuously or cyclically deliver a measuring signal representing a harvest weight accumulated by the harvesting machine in the storage bins. - a chassis mounted on at least one train of wheels which are each movable about a wheel-train axle , said chassis being arranged so as to straddle a row of vines during a mechanical harvest, - a vine-row shaker assembly in mechanical connection with the chassis, capable of separating the grape harvest from the vine row, - an assembly for collecting the harvest from the shaking assembly and conveying it to one or more storage bins , the storage bins each being attached to an associated bin seat mounted pivotally around a bin pivot shaft mechanically connected to the chassis to ensure emptying of the storage bins, and - a measuring device for harvest weight accumulated in the storage bins, - each storage bin is connected to the associated bin seat via load sensors , the load sensors being elongate flexion sensors each including two attachment ends (132-1, 132-2), a first attachment end (132-1) being attached to the storage bin and a second attachment end (132-2) being attached to the associated bin seat so that the storage bin is suspended from the associated bin seat , - the fastening ends (132-1, 132-2) of the load sensors are disposed above the shaking assembly when the machine is located on a horizontal flat floor, - each load sensor is supplied by the harvest weight measuring device to deliver a sensor signal (401 to 408) at any time during the mechanical harvest, and - the measuring device is configured to process the signals (401 to 408) of the load sensors and to continuously or cyclically deliver a measuring signal representing a harvest weight accumulated by the harvesting machine in the storage bins. <EOS>