A weighing module for smart shelves

Abstract

The present invention belongs to the field of intelligent warehousing technology for medical consumables, and specifically relates to a weighing module for intelligent shelves, comprising: a pallet; a weighing assembly; a bin box; a lifting mechanism installed between the pallet and the bin box; a driving mechanism installed on the pallet, the driving mechanism being configured to drive the lifting mechanism to switch between the lifting station and the lowering station; and a controller electrically connected to the weighing assembly and the driving mechanism. The present invention can effectively solve the problem of decreased weighing accuracy caused by long-term static loads by arranging a liftable lifting mechanism to work in conjunction with the weighing assembly; this intermittent weighing mechanism not only ensures force consistency during measurement, ensuring that the elastomer is in its initial state each time it is weighed, but also maintains the material properties of the elastomer through periodic unloading, so that the strain gauge in the weighing assembly can continuously output a stable signal.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent storage of medical consumables, and in particular relates to a weighing module for intelligent shelves. Background Art

[0002] In the healthcare sector, smart shelves leverage IoT technology to precisely manage medical supplies (such as medicines and consumables). They monitor inventory status, expiration dates, and usage trends in real time, effectively reducing manual inventory errors. Furthermore, smart shelves automatically trigger replenishment alerts when out-of-stock items occur, improving supply efficiency. They also optimize purchasing decisions and reduce waste through data analysis. Furthermore, the system supports full-process traceability of high-value consumables, ensuring medical safety and meeting regulatory compliance requirements, significantly enhancing the intelligence and operational efficiency of hospital warehouse management.

[0003] To achieve the above functions, smart shelves need to accurately obtain inventory information of the stored goods. Currently, common inventory detection technologies mainly rely on weighing modules, which are usually composed of an elastomer and a strain gauge. When the goods are placed on the shelf, their weight acts on the elastomer, causing it to deform, which in turn causes the electrical signal of the strain gauge to change, thereby calculating the weight information of the goods. However, in the application scenario of smart shelves, the weighing module needs to withstand the static load of the goods for a long time. This continuous stress will cause the elastomer to gradually undergo irreversible plastic deformation (also known as "creep"), which will affect the output accuracy of the strain gauge and cause the weighing data to drift or distort. After long-term use, this accumulated error will reduce the reliability of the system and even affect the accuracy and safety of medical supply management. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a weighing module for smart shelves, which can avoid the weighing data drift or distortion caused by the weighing module being subjected to static load for a long time, thereby improving the service life of the weighing module and the reliability of the smart shelves.

[0005] To achieve the above-mentioned objectives and other related objectives, the present invention provides a weighing module for an intelligent shelf, comprising: a pallet; a weighing assembly mounted on the pallet; a bin box arranged above the weighing assembly; a lifting mechanism mounted between the pallet and the bin box, the lifting mechanism being configured to be able to switch between a lifting station and a lowering station, the lifting mechanism lifting the bin box away from the weighing assembly when located at the lifting station, and supporting the bin box on the weighing assembly when located at the lowering station; a driving mechanism mounted on the pallet, the driving mechanism being configured to be able to drive the lifting mechanism to switch between the lifting station and the lowering station; and a controller electrically connected to the weighing assembly and the driving mechanism.

[0006] In an optional embodiment of the present invention, a grating detection device is further included, and the grating detection device is used to detect whether a user interacts with the storage box, and the grating detection device is electrically connected to the controller; the controller is configured to control the drive mechanism to operate so as to drive the lifting mechanism located at the lifting station to switch to the lowering station when the grating detection device detects that the user interacts with the storage box, and when the user ends the interaction with the storage box, after a preset time, the controller records the weighing data of the weighing component and controls the drive mechanism to operate so as to drive the lifting mechanism to switch back to the lifting station.

[0007] In an optional embodiment of the present invention, the lifting mechanism includes a crossbeam, and elastic support arms arranged in an eight-shaped shape are provided on both sides of the crossbeam. The driving mechanism is configured to drive the two elastic support arms to open and close with each other in a horizontal direction to lift or lower the crossbeam.

[0008] In an optional embodiment of the present invention, the crossbeam includes a first crossbeam and a second crossbeam which are separately arranged, the first crossbeam and the second crossbeam are arranged in parallel and spaced apart, and the first crossbeam and the second crossbeam are respectively located at the front and rear sides of the weighing assembly.

[0009] In an optional embodiment of the present invention, the driving mechanism includes a motor reducer assembly and a driving shaft, the driving shaft is connected to the power output end of the motor reducer assembly, a first transmission mechanism is provided between the driving shaft and the elastic support arm of the first beam, and a second transmission mechanism is provided between the driving shaft and the elastic support arm of the second beam.

[0010] In an optional embodiment of the present invention, the first transmission mechanism includes a first sliding rod and a second sliding rod, the first sliding rod and the second sliding rod are slidably connected to the support plate in a horizontal direction, the first sliding rod is provided with a first sliding sleeve, the first sliding sleeve is provided with a first spiral groove, the second sliding sleeve is provided with a second spiral groove, the driving shaft is provided with a first driving pin and a second driving pin protruding in a radial direction, the first driving pin and the second driving pin respectively form a sliding fit with the first spiral groove and the second spiral groove, the first spiral groove and the second spiral groove rotate in opposite directions, the elastic support arms on both sides of the first beam are respectively connected with the first sliding rod and the The second transmission mechanism comprises a third slide bar and a fourth slide bar, wherein the third slide bar and the fourth slide bar are slidably connected to the support plate in a horizontal direction, the third slide bar is provided with a third sleeve, the third slide sleeve is provided with a third spiral groove, the fourth slide bar is provided with a fourth sleeve, and the fourth slide sleeve is provided with a fourth spiral groove, and the driving shaft is provided with a third driving pin and a fourth driving pin protruding in the radial direction, the third driving pin and the fourth driving pin respectively form a sliding fit with the third spiral groove and the fourth spiral groove, the third spiral groove and the fourth spiral groove have opposite rotation directions, and the elastic support arms on both sides of the second beam are respectively fixed to the third slide bar and the fourth slide bar.

[0011] In an optional embodiment of the present invention, a first arc groove is provided at one end of the first spiral groove, a second arc groove is provided at one end of the second spiral groove, a third arc groove is provided at one end of the third spiral groove, and a fourth arc groove is provided at one end of the fourth spiral groove; the drive shaft has a first rotation stroke and a second rotation stroke; when the drive shaft rotates within the first rotation stroke, the first drive pin slides along the first spiral groove, the second drive pin slides along the second spiral groove, the third drive pin slides along the third arc groove, and the fourth drive pin slides along the fourth arc groove; when the drive shaft rotates within the second rotation stroke, the first drive pin slides along the first arc groove, the second drive pin slides along the second arc groove, the third drive pin slides along the third spiral groove, and the fourth drive pin slides along the fourth spiral groove.

[0012] In an optional embodiment of the present invention, a first positioning mechanism is provided between the crossbeam and the bottom surface of the storage box, and the first positioning mechanism includes a ridge and a first positioning groove that cooperate with each other, one of the ridge and the first positioning groove is provided on the crossbeam, and the other is provided on the bottom surface of the storage box.

[0013] In an optional embodiment of the present invention, a plurality of the weighing components and the storage boxes are provided on the pallet, and each of the weighing components and the storage boxes are arranged along a first direction respectively, the length direction of the beam is parallel to the first direction, and each of the storage boxes shares the beam.

[0014] In an optional embodiment of the present invention, the weighing assembly includes a bracket, a weight sensing device and a balancing disk, the bracket is fixed to the support plate, the first end of the weight sensing device is fixed to the bracket, the second end of the weight sensing device is arranged in a cantilever shape, the second end of the weight sensing device is fixed to the balancing disk, and a second positioning mechanism is provided between the balancing disk and the bottom surface of the bin box, the second positioning mechanism includes two first baffle walls parallel to each other provided on the balancing disk, and two second baffle walls parallel to the first baffle walls provided on the bottom of the bin box, the two second baffle walls are located between the two first baffle walls, at least two cross bars are provided between the two first baffle walls, and the two second baffle walls are provided with second positioning grooves that cooperate with the cross bars.

[0015] The technical effect of the present invention is that: the present invention can effectively solve the problem of decreased weighing accuracy caused by long-term static loads by setting a liftable lifting mechanism to work in conjunction with the weighing component; when the bin box needs to be weighed, the lifting mechanism descends so that the weight of the goods acts completely on the weighing component, and instantaneous and accurate measurement is performed at this time; during the non-weighing period, the driving mechanism controls the lifting mechanism to lift the bin box, so that the weighing component is completely unloaded, thereby avoiding the elastomer in the weighing component from being continuously compressed and causing creep, and eliminating the plastic deformation error caused by long-term load from the root. This intermittent weighing mechanism not only ensures the consistency of force during measurement, ensuring that the elastomer is in its initial state each time it is weighed, but also maintains the material properties of the elastomer through periodic unloading, so that the strain gauge in the weighing component can continuously output a stable signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of a smart shelf provided by an embodiment of the present invention;

[0017] Figure 2 is an exploded view of a weighing module provided by an embodiment of the present invention;

[0018] Figure 3 is a cross-sectional view of a weighing module provided by an embodiment of the present invention;

[0019] Figure 4 yes Figure 3 I local enlarged view;

[0020] Figure 5 yes Figure 3 II partial enlarged view;

[0021] Figure 6 is a partial perspective view of a beam provided by an embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of a driving mechanism provided by an embodiment of the present invention;

[0023] Figure 8 is a three-dimensional diagram of a balancing disk provided by an embodiment of the present invention;

[0024] Figure 9 is a three-dimensional diagram of a storage box provided by an embodiment of the present invention;

[0025] Explanation of Reference Numerals: 100, cabinet; 10, support plate; 20, weighing assembly; 21, bracket; 22, weight sensing device; 23, balancing plate; 231, first retaining wall; 232, crossbar; 30, bin box; 31, first positioning groove; 32, second retaining wall; 33, second positioning groove; 40, lifting mechanism; 400, crossbeam; 41, first crossbeam; 42, second crossbeam; 43, elastic support arm; 44, ridge; 50, drive shaft; 501, first drive pin; 502, second drive pin; 503, third drive pin; 504, fourth drive pin; 51, first slide bar; 52, second slide bar; 53, first sleeve; 531, first spiral groove; 532, first arcuate groove; 54, second sleeve; 541, second spiral groove; 542, second arcuate groove; 55, third slide bar; 56, fourth slide bar; 57, third sleeve; 571, third spiral groove; 572, third arcuate groove; 58, fourth sleeve; 581, fourth spiral groove; 582, fourth arcuate groove; 60, grating detection device. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0028] The following is a detailed description of the technical solution of the present invention in conjunction with a smart shelf. Figure 1 As shown, the smart shelf includes a cabinet 100 and multiple layers of weighing modules installed in the cabinet 100, with each layer of weighing modules spaced apart from each other. Figures 2 to 9 As shown, the weighing module includes a pallet 10, a weighing component 20, a bin box 30, a lifting mechanism 40, a driving mechanism and a controller (not shown in the figure); the weighing component 20 is installed on the pallet 10; the bin box 30 is arranged above the weighing component 20; the lifting mechanism 40 is installed between the pallet 10 and the bin box 30, and the lifting mechanism 40 is configured to be able to switch between a lifting station and a lowering station, and when the lifting mechanism 40 is located at the lifting station, the bin box 30 is lifted away from the weighing component 20, and when the lifting mechanism 40 is located at the lowering station, the bin box 30 is supported on the weighing component 20; the driving mechanism is installed on the pallet 10, and the driving mechanism is assembled to be able to drive the lifting mechanism 40 to switch between the lifting station and the lowering station; the controller is electrically connected to the weighing component 20 and the driving mechanism. The present invention can effectively solve the problem of decreased weighing accuracy caused by long-term static loads by providing a liftable lifting mechanism 40 that works in conjunction with the weighing assembly 20. When the bin box 30 needs to be weighed, the lifting mechanism 40 descends so that the weight of the cargo fully acts on the weighing assembly 20, at which time instantaneous and accurate measurement is performed. During the non-weighing period, the driving mechanism controls the lifting mechanism 40 to lift the bin box 30, completely unloading the weighing assembly 20, thereby avoiding the elastomer in the weighing assembly 20 from being continuously compressed and causing creep, and fundamentally eliminating the plastic deformation error caused by long-term loads. This intermittent weighing mechanism not only ensures force consistency during measurement, ensuring that the elastomer is in its initial state during each weighing, but also maintains the material properties of the elastomer through periodic unloading, allowing the strain gauge in the weighing assembly 20 to continuously output a stable signal.

[0029] See also Figure 1As shown, in an optional embodiment of the present invention, a grating detection device 60 is further included, and the grating detection device 60 is used to detect whether a user interacts with the storage box 30. The grating detection device 60 is electrically connected to the controller. Specifically, the grating detection device 60 can be installed at the bottom of each layer of the pallet 10 and the bottom of the top plate of the cabinet 100; the controller is configured to control the drive mechanism to drive the lifting mechanism 40 located at the lifting station to switch to the lowering station when the grating detection device 60 detects that the user interacts with the storage box 30, and when the user ends the interaction with the storage box 30, after a preset time, the controller records the weighing data of the weighing component 20 and controls the drive mechanism to drive the lifting mechanism 40 to switch back to the lifting station. This further embodiment achieves more intelligent and precise weighing management by collaboratively controlling the action sequence of the lifting mechanism 40 through the grating detection device 60 and the controller: when the grating detects that the user is interacting with the bin box 30, the controller immediately controls the lifting mechanism 40 to descend so that the bin box 30 contacts the weighing assembly 20, at which point the system enters a pre-weighing state; after the user's operation is completed, after a preset delay to ensure that the goods are stationary, the controller collects stable weighing data, and then immediately controls the lifting mechanism 40 to lift the bin box 30 so that it is separated from the weighing assembly 20. The present invention only briefly loads the weighing assembly 20 when weighing is required, minimizing the time the elastomer is under pressure and fundamentally suppressing creep errors; the preset delay eliminates mechanical vibration interference caused by the operation, ensuring stability during data collection; and the lifting state is immediately restored after the interaction is completed, avoiding long-term load on the weighing assembly 20, thereby significantly extending the life of the sensor while ensuring measurement accuracy.

[0030] See also Figures 3 to 6As shown, in an optional embodiment of the present invention, the lifting mechanism 40 includes a beam 400, and elastic support arms 43 arranged in an eight-shaped shape are provided on both sides of the beam 400. The driving mechanism is configured to drive the two elastic support arms 43 to open and close with each other in a horizontal direction to lift or lower the beam 400. This further embodiment realizes an efficient and reliable lifting action through the design of the figure-eight elastic support arm 43; when the driving mechanism drives the elastic support arms 43 on both sides to open and close horizontally, the figure-eight structure converts the horizontal displacement into vertical movement, so that the beam 400 produces a stable lifting action; the figure-eight layout of the elastic support arm 43 not only provides the necessary structural rigidity, but also absorbs the operational shock through elastic deformation, protecting the weighing component 20 from instantaneous overload; the symmetrical double-arm drive ensures that the beam 400 is subjected to balanced force, avoids the deflection of the bin box 30 during the lifting process, and ensures horizontal stability during weighing; the deformation characteristics of the elastic support arm 43 can automatically compensate for the gap error caused by mechanical wear, so that the system can still maintain an accurate lifting stroke after long-term use, thereby maintaining the measurement accuracy of the weighing module; this compact and reliable structural design realizes precise load switching function in a limited space.

[0031] See also Figures 3 to 5 As shown, in an optional embodiment of the present invention, the beam 400 includes a first beam 41 and a second beam 42 which are separately arranged, the first beam 41 and the second beam 42 are arranged in parallel and spaced apart, and the first beam 41 and the second beam 42 are respectively located on the front and rear sides of the weighing component 20. This further embodiment adopts a split double beam 400 design, and achieves more optimized load distribution and structural stability by arranging the first beam 41 and the second beam 42 in parallel on the front and rear sides of the weighing assembly 20; the split design enables the weight of the storage box 30 to be symmetrically distributed to the front and rear support points, effectively avoiding the torque deformation that may be caused by the single beam 400 structure, and ensuring that the storage box 30 always maintains a horizontal posture during the lifting process; at the same time, the spaced arrangement of the double beams 400 provides the weighing assembly 20 with a central unobstructed measuring area, which not only ensures that the weighing sensor is evenly stressed, but also facilitates installation and maintenance; this symmetrical load structural design not only improves the stability of the lifting action, but also reduces the stress concentration of the single beam 400 by dispersing the force, thereby extending the service life of key components, and ultimately ensuring the accuracy and reliability of the long-term operation of the weighing system.

[0032] See also Figures 3 to 5 、 Figure 7As shown, in an optional embodiment of the present invention, the driving mechanism includes a motor reducer assembly (not shown) and a driving shaft 50, the driving shaft 50 is connected to the power output end of the motor reducer assembly, a first transmission mechanism is provided between the driving shaft 50 and the elastic support arm 43 of the first beam 41, and a second transmission mechanism is provided between the driving shaft 50 and the elastic support arm 43 of the second beam 42. The first transmission mechanism includes a first slide bar 51 and a second slide bar 52, the first slide bar 51 and the second slide bar 52 are slidably connected to the support plate 10 in the horizontal direction, the first slide bar 51 is provided with a first sleeve 53, the first sleeve 53 is provided with a first spiral groove 531, the second slide bar 52 is provided with a second sleeve 54, and the second sleeve 54 is provided with a second spiral groove 541. The drive shaft 50 is provided with a first driving pin 501 and a second driving pin 502 protruding in the radial direction, the first driving pin 501 and the second driving pin 502 respectively form a sliding fit with the first spiral groove 531 and the second spiral groove 541, and the first spiral groove 531 and the second spiral groove 541 rotate in opposite directions, and the elastic support arms 43 on both sides of the first beam 41 are fixedly connected to the first slide bar 51 and the second slide bar 52 respectively; The second transmission mechanism includes a third slide bar 55 and a fourth slide bar 56, and the third slide bar 55 and the fourth slide bar 56 are slidably connected to the support plate 10 in the horizontal direction. The third slide bar 55 is provided with a third sleeve 57, and the third sleeve 57 is provided with a third spiral groove 571. The fourth slide bar 56 is provided with a fourth sleeve 58, and the fourth sleeve 58 is provided with a fourth spiral groove 581. The drive shaft 50 is provided with a third driving pin 503 and a fourth driving pin 504 protruding in the radial direction, and the third driving pin 503 and the fourth driving pin 504 respectively form a sliding fit with the third spiral groove 571 and the fourth spiral groove 581, and the third spiral groove 571 and the fourth spiral groove 581 rotate in opposite directions. The elastic support arms 43 on both sides of the second crossbeam 42 are respectively fixed to the third slide bar 55 and the fourth slide bar 56. The present invention realizes the synchronous or asynchronous precise driving of the double crossbeam 400. When the motor reducer drives the drive shaft 50 to rotate, each drive pin slides in the spiral groove of different rotation direction, converting the rotational motion into the horizontal reciprocating motion of the slide rod. Since the adjacent spiral grooves have opposite rotation directions, the paired slide rods always move in the opposite direction, thereby driving the eight-shaped elastic support arm 43 to open and close synchronously; the spiral groove transmission has a self-locking characteristic and can remain stable at any position, ensuring that the lifting mechanism 40 can be accurately positioned at the lifting and lowering stations; the single drive shaft 50 controls four slide rods at the same time through symmetrically arranged spiral grooves, which simplifies the transmission structure, reduces the number of driving elements, and reduces costs.

[0033] See also Figure 7As shown, in an optional embodiment of the present invention, one end of the first spiral groove 531 is provided with a first arc groove 532, one end of the second spiral groove 541 is provided with a second arc groove 542, one end of the third spiral groove 571 is provided with a third arc groove 572, and one end of the fourth spiral groove 581 is provided with a fourth arc groove 582; the driving shaft 50 has a first rotation stroke and a second rotation stroke; when the driving shaft 50 rotates within the first rotation stroke, the first driving pin 501 slides along the first spiral groove 531, and the second The driving pin 502 slides along the second spiral groove 541, the third driving pin 503 slides along the third arcuate groove 572, and the fourth driving pin 504 slides along the fourth arcuate groove 582. When the driving shaft 50 rotates within the second rotational stroke, the first driving pin 501 slides along the first arcuate groove 532, the second driving pin 502 slides along the second arcuate groove 542, the third driving pin 503 slides along the third spiral groove 571, and the fourth driving pin 504 slides along the fourth spiral groove 581. When the driving shaft 50 rotates within the first rotational stroke, only the first crossbeam 41 is driven to move. When the driving shaft 50 rotates within the second rotational stroke, only the second crossbeam 42 is driven to move. This further embodiment achieves time-sharing drive control of the double beams 400 by arranging alternating arc grooves and spiral grooves. When the drive shaft 50 is in the first rotation stroke, the elastic support arm 43 of the first beam 41 realizes opening and closing movement through the spiral groove transmission, while the drive pin of the second beam 42 idles in the arc groove without displacement. Conversely, in the second rotation stroke, the elastic support arm 43 of the second beam 42 moves while the first beam 41 remains stationary. This time-sharing drive mechanism decomposes the load that originally required the simultaneous driving of four slide rods into two stages, so that the motor reducer only needs to overcome the motion resistance of a single beam 400 at any time, thereby reducing the instantaneous load by about 50%, increasing the freedom of motor selection, and reducing equipment costs. At the same time, the staged action also reduces the inertial impact of the transmission system, which not only extends the life of the motor, but also improves positioning accuracy. Ultimately, a smoother and more energy-efficient system operation is achieved while ensuring the lifting function.

[0034] See also Figure 4 、 Figure 5As shown, in an optional embodiment of the present invention, a first positioning mechanism is provided between the crossbeam 400 and the bottom surface of the storage box 30. The first positioning mechanism includes a cooperating ridge 44 and a first positioning groove 31. One of the ridge 44 and the first positioning groove 31 is provided on the crossbeam 400, and the other is provided on the bottom surface of the storage box 30. This further embodiment establishes a precise mechanical positioning reference between the crossbeam 400 and the storage box 30 through the cooperating design of the ridge 44 and the first positioning groove 31. When the lifting mechanism 40 lifts the storage box 30 to the working position, the engagement of the ridge 44 and the positioning groove automatically corrects the horizontal position of the storage box 30, eliminating minor deviations caused by transmission clearance or assembly errors, and ensuring that the storage box 30 maintains a completely consistent contact position and force distribution with the weighing assembly 20 each time it is lowered for weighing.

[0035] See also Figure 1 、 Figure 2 As shown, in an optional embodiment of the present invention, a plurality of weighing assemblies 20 and storage boxes 30 are provided on the pallet 10, and each weighing assemblies 20 and each storage box 30 are arranged along a first direction, the longitudinal direction of the crossbeam 400 is parallel to the first direction, and each storage box 30 shares the crossbeam 400. This further embodiment achieves a simultaneous improvement in space utilization and system efficiency by adopting an integrated design in which a single crossbeam 400 drives multiple storage boxes 30; by arranging multiple weighing assemblies 20 and storage boxes 30 in the same direction and uniformly driven by a shared crossbeam 400, a single drive mechanism can control the synchronous lifting and lowering of an entire row of storage boxes 30, which not only significantly reduces the number of actuators, reduces manufacturing costs and maintenance complexity, but also ensures the consistency of the actions of each storage box 30 through unified drive.

[0036] See also Figure 3 、 Figure 8 、 Figure 9As shown, in an optional embodiment of the present invention, the weighing assembly 20 includes a bracket 21, a weight sensing device 22 and a balancing disk 23, the bracket 21 is fixed to the support plate 10, the first end of the weight sensing device 22 is fixed to the bracket 21, the second end of the weight sensing device 22 is cantilevered, the second end of the weight sensing device 22 is fixed to the balancing disk 23, and a second positioning mechanism is provided between the balancing disk 23 and the bottom surface of the bin box 30, the second positioning mechanism includes two mutually parallel first baffle walls 231 provided on the balancing disk 23, and two second baffle walls 32 parallel to the first baffle walls 231 provided at the bottom of the bin box 30, the two second baffle walls 32 are located between the two first baffle walls 231, at least two cross bars 232 are provided between the two first baffle walls 231, and the two second baffle walls 32 are provided with second positioning grooves 33 that cooperate with the cross bars 232. When the storage box 30 descends, the second retaining wall 32 first embeds into the guide channel formed by the first retaining wall 231 for preliminary lateral positioning; then the cross bar 232 and the second positioning groove 33 are precisely engaged to complete the longitudinal limitation, effectively eliminating the position deviation caused by the assembly gap; the positioning structure ensures that the contact state of the storage box 30 and the balance plate 23 remains consistent each time weighing, fundamentally ensuring the accuracy of the weighing data.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

[0038] In the description herein, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, assemblies, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

Claims

1. A weighing module for smart shelves, characterized in that: include: Support plate (10); A weighing assembly (20) mounted on the support plate (10); A bin box (30) is arranged above the weighing assembly (20); a lifting mechanism (40) installed between the support plate (10) and the bin box (30), the lifting mechanism (40) being configured to be switchable between a lifting position and a lowering position, wherein the lifting mechanism (40) lifts the bin box (30) away from the weighing assembly (20) when the lifting mechanism (40) is located at the lifting position, and supports the bin box (30) on the weighing assembly (20) when the lifting mechanism (40) is located at the lowering position; A driving mechanism, mounted on the support plate (10), the driving mechanism being configured to drive the lifting mechanism (40) to switch between the lifting station and the lowering station; a controller electrically connected to the weighing assembly (20) and the driving mechanism; The lifting mechanism (40) comprises a crossbeam (400), and elastic support arms (43) arranged in an eight-shaped pattern are provided on both sides of the crossbeam (400), and the driving mechanism is configured to drive the two elastic support arms (43) to open and close with each other in a horizontal direction, so as to lift or lower the crossbeam (400); The crossbeam (400) includes a first crossbeam (41) and a second crossbeam (42) that are separately arranged, and the first crossbeam (41) and the second crossbeam (42) are respectively located at the front and rear sides of the weighing assembly (20); The driving mechanism comprises a driving shaft (50), a first transmission mechanism is provided between the driving shaft (50) and the elastic support arm (43) of the first crossbeam (41), and a second transmission mechanism is provided between the driving shaft (50) and the elastic support arm (43) of the second crossbeam (42); The first transmission mechanism includes a first slide bar (51) and a second slide bar (52), the first slide bar (51) and the second slide bar (52) are slidably connected to the support plate (10) in the horizontal direction, the first slide bar (51) is provided with a first slide sleeve (53), the first slide sleeve (53) is provided with a first spiral groove (531), the second slide bar (52) is provided with a second slide sleeve (54), the second slide sleeve (54) is provided with a second spiral groove (541), the drive shaft (50) is provided with a first drive pin (501) and a second drive pin (502) protruding in the radial direction, the first drive pin (501) and the second drive pin (502) are respectively slidably matched with the first spiral groove (531) and the second spiral groove (541), the first spiral groove (531) and the second spiral groove (541) rotate in opposite directions, and the elastic support arms (43) on both sides of the first beam (41) are respectively fixed to the first slide bar (51) and the second slide bar (52); The second transmission mechanism includes a third slide bar (55) and a fourth slide bar (56), wherein the third slide bar (55) and the fourth slide bar (56) are slidably connected to the support plate (10) in the horizontal direction, the third slide bar (55) is provided with a third slide sleeve (57), and the third slide sleeve (57) is provided with a third spiral groove (571), the fourth slide bar (56) is provided with a fourth slide sleeve (58), and the fourth slide sleeve (58) is provided with a fourth spiral groove (581), and the drive shaft (50) is provided with a third slide sleeve (57). A third driving pin (503) and a fourth driving pin (504) are provided which protrude radially. The third driving pin (503) and the fourth driving pin (504) respectively form a sliding fit with the third spiral groove (571) and the fourth spiral groove (581). The third spiral groove (571) and the fourth spiral groove (581) rotate in opposite directions. The elastic support arms (43) on both sides of the second beam (42) are respectively fixed to the third slide bar (55) and the fourth slide bar (56). One end of the first spiral groove (531) is provided with a first arc groove (532), one end of the second spiral groove (541) is provided with a second arc groove (542), one end of the third spiral groove (571) is provided with a third arc groove (572), and one end of the fourth spiral groove (581) is provided with a fourth arc groove (582); the driving shaft (50) has a first rotation stroke and a second rotation stroke; when the driving shaft (50) rotates within the first rotation stroke, the first driving pin (501) slides along the first spiral groove (531), and the second driving pin (502) slides along the The second spiral groove (541) slides, the third drive pin (503) slides along the third arc groove (572), and the fourth drive pin (504) slides along the fourth arc groove (582); when the drive shaft (50) rotates within the second rotation stroke, the first drive pin (501) slides along the first arc groove (532), the second drive pin (502) slides along the second arc groove (542), the third drive pin (503) slides along the third spiral groove (571), and the fourth drive pin (504) slides along the fourth spiral groove (581).

2. The weighing module for smart shelves according to claim 1, characterized in that: The invention also includes a grating detection device (60), which is used to detect whether a user interacts with the storage box (30), and the grating detection device (60) is electrically connected to the controller; the controller is configured to control the driving mechanism to operate when the grating detection device (60) detects that the user interacts with the storage box (30), so as to drive the lifting mechanism (40) located at the lifting station to switch to the lowering station, and when the user ends the interaction with the storage box (30), after a preset time, the controller records the weighing data of the weighing component (20) and controls the driving mechanism to operate so as to drive the lifting mechanism (40) to switch back to the lifting station.

3. The weighing module for smart shelves according to claim 1, characterized in that: The first crossbeam (41) and the second crossbeam (42) are arranged in parallel and spaced apart.

4. The weighing module for smart shelves according to claim 1, characterized in that: The driving mechanism comprises a motor reducer assembly, and the driving shaft (50) is connected to the power output end of the motor reducer assembly.

5. The weighing module for smart shelves according to claim 1, characterized in that: A first positioning mechanism is provided between the crossbeam (400) and the bottom surface of the storage box (30), the first positioning mechanism comprising a convex ridge (44) and a first positioning groove (31) that cooperate with each other, one of the convex ridge (44) and the first positioning groove (31) being provided on the crossbeam (400), and the other being provided on the bottom surface of the storage box (30).

6. The weighing module for smart shelves according to claim 1, characterized in that: A plurality of weighing assemblies (20) and storage boxes (30) are provided on the support plate (10), and each weighing assemblies (20) and each storage box (30) are arranged along a first direction, respectively. The length direction of the crossbeam (400) is parallel to the first direction, and each storage box (30) shares the crossbeam (400).

7. The weighing module for smart shelves according to claim 1, characterized in that: The weighing assembly (20) includes a bracket (21), a weight sensing device (22) and a balancing plate (23), wherein the bracket (21) is fixedly connected to the support plate (10), a first end of the weight sensing device (22) is fixedly connected to the bracket (21), a second end of the weight sensing device (22) is cantilevered, a second end of the weight sensing device (22) is fixedly connected to the balancing plate (23), a second positioning mechanism is provided between the balancing plate (23) and the bottom surface of the bin box (30), and the second The positioning mechanism includes two mutually parallel first baffle walls (231) provided on the balancing plate (23), and two second baffle walls (32) provided on the bottom of the bin box (30) and parallel to the first baffle walls (231), the two second baffle walls (32) are located between the two first baffle walls (231), at least two cross bars (232) are provided between the two first baffle walls (231), and the two second baffle walls (32) are provided with second positioning grooves (33) that cooperate with the cross bars (232).

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