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 being attached to the storage bin and a second attachment end 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 being attached to the storage bin and a second attachment end 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.