A weighing sensor and a lever are disclosed. The weighing sensor has a load-receiving portion, a fixing portion, and a parallel guiding portion connected to the load-receiving portion and the fixing portion. The parallel guiding portion has upper and lower parallel guiding units, separated from each other. The ends of the parallel guiding units are connected to the load-receiving portion and the fixing portion. The fixing portion has an extension located between the parallel guiding units. The extension is at a distance from both parallel guiding units and extends to the load-receiving portion. A gap is formed between the extension and the load-receiving portion; and the distance between the extension and the upper parallel guiding unit allows a lever to pass through. The weighing sensor has a simple structure, both the processing process and the assembly process are simplified, and the processing and assembly during production are facilitated.

A load sensing system having at least one load sensing assembly for use with a weigh frame, each assembly including at least a first lever and a second lever. Each lever has a lever longitudinal axis, a lever fulcrum section, a lever load section, and a lever connector section spaced from the lever fulcrum section and the lever load section along the lever longitudinal axis. For each lever, a flexure plate is aligned in parallel with the lever longitudinal axis and has a middle bearing portion and opposing end portions with one of the end portions fixedly attached to its respective lever. Each lever fulcrum section has a lever bearing surface including one of (i) a line-of-contact rounded bearing edge oriented perpendicular to the lever longitudinal axis or (ii) a flat bearing face. The lever bearing surface of each lever touches the middle bearing portion of the flexure plate. Each assembly further includes a sensor having a support surface, a force transmission platform, and an output representative of total force applied to the force transmission platform. At least one force transmission link is adapted to connect each lever connector section to the force transmission platform, and at least one load link is adapted to connect the lever load section of each lever to the weigh frame.

A monolithic weighing system (100) includes a plurality of levers (120), which are joined together by thin-section joints (110). The levers, on the one hand, and the thin-section joints, on the other hand, are made of different materials or material combinations; and the levers, adjoining one of the thin-section joints on both sides thereof, have a first material (21), and the thin-section joint has a second material (22) which is different from the first material. An associated method includes (i) an additive manufacturing process, in which different materials, including the first and second material (21, 22), are applied in layers and are joined to form a single-piece weighing system blank (10), wherein the weighing system blank (10) has prospective lever regions (12) and prospective thin-section joint regions (11), and (ii) subsequent subtractive finishing of the weighing system blank at least on the prospective thin-section joint regions to obtain the weighing system.

A load cell has a monolithic measuring body. The monolithic measuring body has: a force-supporting section; a force-introduction section; and a linkage section disposed between the force-supporting section and the force-introduction section. The monolithic measuring body has a longitudinal axis between a force-supporting-side axial end and a force-introduction-side axial end. The longitudinal axis is configured to extend in a horizontal direction. The monolithic measuring body further has, in the force-supporting section, at least one mounting hole for attachment of the monolithic measuring body, the axis of the at least one mounting hole extending in the horizontal direction. At least one strain gauge is configured to sense tensile or compressive deformation of the monolithic measuring body and is in a region of the linkage section on a top side or a bottom side of the monolithic measuring body, the at least one strain gauge being oriented in the horizontal direction.

Aweigh module with a load-receiving portion, a fixing portion, and a parallel guide portion also has a lever system with a first lever and a second lever. An additional portion of the load-receiving portion extends towards the fixing portion. An extension of the fixing portion extends towards the load-receiving portion. A first end of the first lever is connected by joints to the additional portion and the extension portion. A first end of the second lever is connected by joints to the second end of the first lever and to the extension portion. All joints are of a thin sheet structure. The second end of the second lever is configured for connection to a magnetic system. The weigh module is manufactured integrally. The use of the structure according to the present invention can meet design requirements of large range and small size of sensors.

A force sensor has a first end portion (1), a second end portion (2), a parallel-guiding mechanism (3), a beam (4), and a strain gauge (5). The parallel-guiding mechanism (3) connects the first end portion (1) to the second end portion (2). A main beam (43) of the beam has a flexible wall (435) and a rigid wall (432). A first connecting part (41) connects the flexible wall to the first end portion, and a second connecting part (42) connects the rigid wall to the second end portion. The strain gauge (5) is fixed to the flexible wall (435). The force sensor can measure a relatively small force.

A weighing sensor for a scale, includes a mainland body, a load receiver articulated on the mainland body by parallelogram guiding, and a lever mechanism having at least two levers which are supported on the mainland body by supporting joints, a first lever being arranged closer to a load receiver than a second lever, and the at least two levers being connected to each other via coupling rods and load joints, a calibration weight assembly including a calibration weight rest and a calibration weight being arranged on one lever, the calibration weight rest being connected to at least one coupling element.

A load sensing system having at least one load sensing assembly for use with a weigh frame, each assembly including at least a first lever and a second lever. Each lever has a lever longitudinal axis, a lever fulcrum section, a lever load section, and a lever connector section spaced from the lever fulcrum section and the lever load section along the lever longitudinal axis. For each lever, a flexure plate is aligned in parallel with the lever longitudinal axis and has a middle bearing portion and opposing end portions with one of the end portions fixedly attached to its respective lever. Each lever fulcrum section has a lever bearing surface including one of (i) a line-of-contact rounded bearing edge oriented perpendicular to the lever longitudinal axis or (ii) a flat bearing face. The lever bearing surface of each lever touches the middle bearing portion of the flexure plate. Each assembly further includes a sensor having a support surface, a force transmission platform, and an output representative of total force applied to the force transmission platform. At least one force transmission link is adapted to connect each lever connector section to the force transmission platform, and at least one load link is adapted to connect the lever load section of each lever to the weigh frame.

A load cell scale has a load cell part formed in a columnar shape, the load cell part having a upper surface extending along a longitudinal axis and a lateral surface intersecting with the upper surface, and a stopper part configured to restrict deformation occurring in the load cell due to a load exceeding a predetermined value and applied to the load cell, wherein the load cell part has a strain portion capable of elastically deforming and the strain portion penetrates the load cell part from the lateral surface in a short direction orthogonal to the longitudinal direction, and wherein the stopper portion is provided to be connected to the lateral surface of the load cell part.

A load cell with a Roberval structure having an anti-offset function, and a weighing device are disclosed. The load cell includes strain detection elements mounted on an elastic element which includes a loading portion for receiving a load from a connector, a fixing portion for fixing the elastic element, a strain generation portion for converting the load into deformation, and a parallel guide beam for transferring the load and keeping the loading portion translational when loaded. The strain generation portion includes at least one hollow cavity body. The loading portion and the fixing portion are respectively located on left and right sides of the strain generation portion. The parallel guide beam is located at upper and lower portions of the strain generation portion A center of rotation and a geometric center of the strain generation portion coincide when the load cell with the Roberval structure is loaded.