A weighing module based on a cantilever beam sensor

Abstract

The utility model relates to a weighing module based on cantilever beam sensor, and the weighing module comprises a lower bottom plate, an upper pressing plate, a bearing block and a cantilever beam sensor, the cantilever beam sensor is installed with a press -fitting support leg, and a fastening bolt is locked to the lower bottom plate by passing through the cantilever beam sensor and the bearing block. The weighing module further comprises a pressure head piece, a support frame and a limiting assembly, the support frame is detachably installed in the lower bottom plate in a U shape, the support frame is provided with a limiting hole penetrating through, and the limiting hole comprises a central region and a void region. The pressure head piece is detachably installed on the upper pressing plate, the pressure head piece comprises a cylinder part and a limiting protrusion, the pressure head piece is rotated and crimped on the press -fitting support leg after being inserted into the limiting hole, and the limiting protrusion and the void region are arranged in a staggered mode. The support frame and the lower bottom plate are detachably connected, so as to realize assembly connection, and production and processing are convenient. The support frame is an integral structure, can adopt integral forming, is stable in structural size and is high in efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metrology technology, and in particular to a weighing module based on a cantilever beam sensor. Background Technology

[0002] A typical weighing module consists of three core components: an upper pressure plate, a lower base plate, and a sensor. The upper pressure plate is fixedly connected to the equipment to be weighed via a transition plate, while the lower base plate is also assembled with the foundation platform using a transition structure. The sensor is fixedly mounted on the lower base plate via a load-bearing block, forming an overhead sensor installation. The sensor forms abutment support with the upper pressure plate through a pressure head assembly, ultimately constituting a complete weight measurement structure. For example, the publication document with publication number CN219455285U provides an integrated dynamic and static load weighing module.

[0003] The existing weighing module has a limit frame, which is welded from multiple plates and fixed to the lower base plate to form a single structure. However, the welding process between the limit frame and the lower base plate is cumbersome and results in low production efficiency, thus requiring improvement. Utility Model Content

[0004] To overcome the problems existing in related technologies, this utility model provides a weighing module based on a cantilever beam sensor to solve the technical problems of cumbersome welding process and low production efficiency between the limit frame and the lower base plate.

[0005] According to a first aspect of the present invention, a weighing module based on a cantilever beam sensor is provided. The weighing module includes a lower base plate, an upper pressure plate, a load-bearing block, and a cantilever beam sensor. The cantilever beam sensor is equipped with press-fit feet. Fastening bolts pass through the cantilever beam sensor and the load-bearing block and are locked to the lower base plate. The weighing module also includes a pressure head, a support frame, and a limiting component snapped onto the support frame. The support frame is U-shaped and detachably installed on the lower base plate. The support frame has a through limiting hole, which includes a central area and clearance areas extending from both sides of the central area. The pressure head is detachably installed on the upper pressure plate. The pressure head includes a column and limiting protrusions protruding from both sides of the column. After the pressure head is inserted into the limiting hole, it rotates and presses against the pressing support foot. The limiting protrusions and the clearance area are misaligned.

[0006] In one embodiment, the support frame includes a top wall portion, vertical wall portions bending from both sides of the top wall portion, a limiting boss partially protruding from the vertical wall portions, and a mounting portion bending from the end of the vertical wall portions. The width of the top wall portion is greater than the opening width corresponding to the two vertical wall portions. The mounting portion has mounting holes, fasteners pass through the mounting holes and are detachably connected to the lower base plate, and the limiting component and the limiting boss are snap-fitted together.

[0007] In one embodiment, the vertical wall portion includes a relatively curved upper wall region and a lower wall region, the interval between the two sets of lower wall regions is smaller than the interval between the two sets of upper wall regions, the mounting portion bends from the end of the lower wall region, and the limiting boss partially protrudes from the surface of the upper wall region.

[0008] In one embodiment, the thickness of the lower wall region is greater than the thickness of the upper wall region.

[0009] In one embodiment, the limiting boss includes a stepped limiting groove and a through hole, the limiting assembly includes a limiting bolt and a limiting nut, the limiting nut is snapped into the limiting groove, and the limiting bolt passes through the through hole and is spirally connected to the limiting nut and the upper pressure plate.

[0010] In one embodiment, the support frame is integrally formed; or, the support frame is welded together.

[0011] In one embodiment, the weighing module further includes a conductive component that connects the upper pressure plate and the lower base plate.

[0012] In one embodiment, the upper pressure plate includes two spaced-apart countersunk holes, and the column portion is provided with two spaced-apart mounting holes. Fasteners pass through the countersunk holes and connect to the mounting holes to lock the pressure head component.

[0013] In one embodiment, the pressure head has a pressure head hole, and the press-fitting support foot is inserted into the pressure head hole.

[0014] In one embodiment, the load-bearing block suspends the cantilever beam sensor, and a deformation space is formed between the cantilever beam sensor and the lower base plate.

[0015] The technical solution provided by the embodiments of this utility model can include the following beneficial effects: the support frame and the lower base plate are detachably connected, thereby realizing assembly connection and facilitating production and processing. The support frame is an integral structure, which can be integrally molded, resulting in stable structural dimensions and high efficiency. The pressure head is installed on the upper pressure plate, with the limiting protrusion and the clearance area staggered. The swing range of the pressure head is limited by the support frame, which satisfies the module's appropriate movement requirements while maintaining the module's limiting requirements. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of a weighing module according to one embodiment.

[0018] Figure 2 This is a cross-sectional schematic diagram of a weighing module according to one embodiment.

[0019] Figure 3 This is an exploded view of a weighing module according to one embodiment.

[0020] Figure 4 This is a schematic diagram illustrating the fit between the pressure head and the support frame according to one embodiment.

[0021] Figure 5 This is a schematic diagram of the support frame according to one embodiment.

[0022] Figure 6 This is a schematic diagram illustrating the structure of the pressure head component mounted on the upper pressure plate according to one embodiment.

[0023] In the diagram, the components are: lower base plate 10; upper pressure plate 20; mounting countersunk hole 21; cantilever beam sensor 30; press-fit foot 31; rubber ring 32; load-bearing block 40; support frame 50; top wall 51; vertical wall 52; lower wall area 521; upper wall area 522; mounting part 53; limiting boss 54; limiting hole 55; clearance area 551; center area 552; mounting hole 56; limiting groove 57; through hole 58; limiting component 60; limiting bolt 61; limiting nut 62; pressure head 70; column part 71; limiting protrusion 72; pressure head hole 73; conductive component 80; conductive cable 81; and conductive part 82. Detailed Implementation

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the present invention. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0025] like Figures 1 to 3 As shown, this utility model provides a weighing module based on a cantilever beam sensor. The weighing module includes a lower base plate 10, an upper pressure plate 20, a load-bearing block 40, and a cantilever beam sensor 30. The load-bearing block 40 is a rectangular block structure that can support and adjust the installation height of the cantilever beam sensor 30 and its position height in conjunction with the upper pressure plate 20. Press-fit feet 31 pass through the cantilever beam sensor 30 and the load-bearing block 40 and are locked to the lower base plate 10, thereby completing the fixed installation of one end of the cantilever beam sensor 30.

[0026] The load-bearing block 40 supports the cantilever beam sensor 30, creating a deformation space between the cantilever beam sensor 30 and the lower base plate 10. The load-bearing block 40 is a rectangular raised block, and the deformation space can meet the deformation space of the cantilever beam sensor 30, while also allowing for the adjustment of the height position of the upper pressure plate 20.

[0027] One end of the cantilever beam sensor 30 is equipped with a press-fit foot 31, which protrudes towards the upper pressure plate 20 to receive the pressure transmitted by the upper pressure plate 20. The cantilever beam sensor 30 outputs a corresponding electrical signal based on the pressure and the deformation of the elastic body, and the weighing instrument calculates the specific weight value based on the electrical signal.

[0028] The pressure head 70 is detachably mounted on the upper pressure plate 20. The pressure head 70 protrudes from the upper pressure plate 20 and inserts into the support frame 50 to press against the press-fit foot 31. Preferably, the pressure head 70 has a pressure head hole 73, and the press-fit foot 31 is inserted into and connected to the pressure head hole 73 to achieve positioning assembly. Further, a rubber ring 32 is fitted onto the press-fit foot 31. The rubber ring 32 is inserted into the pressure head hole 73 and elastically pressed against the hole wall of the pressure head hole 73, allowing the press-fit foot 31 to swing while also achieving a tight fit.

[0029] The support frame 50 is U-shaped and can be detachably installed on the lower base plate 10 to provide support and positioning. A limiting component 60 is snap-fitted onto the support frame 50, providing limitation and support to the upper pressure plate 20 via the limiting component 60. Preferably, the limiting component 60 is installed on the support frame 50 and distributed on both sides of the support frame 50, enabling symmetrical support connection. The support frame 50 and the lower base plate 10 are detachably connected, allowing for easy assembly and processing. The support frame 50 is a one-piece structure, which can be integrally molded, resulting in stable structural dimensions and high efficiency.

[0030] like Figures 3 to 5 As shown, the pressure head 70 includes a cylindrical portion 71 and limiting protrusions 72 protruding from both sides of the cylindrical portion 71, forming an approximately T-shaped structure. Optionally, the cylindrical portion 71 is cylindrical, and the limiting protrusions 72 are distributed on both sides of the cylindrical portion 71, with the width of the limiting protrusions 72 being smaller than the diameter of the cylindrical portion 71.

[0031] The support frame 50 is provided with a through-hole 55, which includes a central area 552 and clearance areas 551 extending from both sides of the central area 552. The locating hole 55 is used for the passage of the pressure head 70, wherein the central area 552 is used to pass through the column part 71, and the clearance area 551 is used to pass through the locating protrusion 72. After the pressure head 70 is inserted into the locating hole 55, it rotates and presses against the press-fit foot 31. The locating protrusion 72 and the clearance area 551 are misaligned to prevent the pressure head 70 from passing through the locating hole 55, and the locating protrusion 72 can prevent the support frame 50 from swinging out of the limited range of the support frame 50.

[0032] The pressure head 70 is installed on the upper pressure plate 20. The limiting protrusion 72 and the clearance area 551 are staggered. The swing range of the pressure head 70 is limited by the support frame 50, which satisfies the module's appropriate movement requirements while maintaining the module's limit requirements.

[0033] like Figures 4 to 6 As shown, in one embodiment, the support frame 50 includes a top wall portion 51, vertical wall portions 52 that bend from both sides of the top wall portion 51, a limiting boss 54 that partially protrudes from the vertical wall portions 52, and a mounting portion 53 that bends from the end of the vertical wall portions 52. The top wall portion 51 and the two vertical wall portions 52 form a U-shaped structure. The vertical wall portions 52 are located at the end of the vertical wall portions 52, thereby forming a flange structure, which facilitates the assembly and fixing of the support frame 50 and the lower base plate 10.

[0034] Furthermore, the width of the top wall portion 51 is greater than the opening width corresponding to the two vertical wall portions 52. The vertical wall portions 52 are at least partially bent to reduce the opening width of the vertical wall portions 52, providing installation space for the mounting portion 53 and the lower base plate 10, avoiding the lower base plate 10 from being too large, and enabling it to be adapted to the installation size of conventional modules.

[0035] The vertical wall portion 52 includes a relatively curved upper wall region 522 and a lower wall region 521, which are arranged in parallel. The upper wall region 522 and the lower wall region 521 are approximately N-shaped structures with vertical misalignment.

[0036] The upper wall area 522 intersects with the top wall portion 51, and the lower wall area 521 bends inward toward the center of the support frame 50. Accordingly, the interval between the two sets of lower wall areas 521 is smaller than the interval between the two sets of upper wall areas 522, and the mounting portion 53 bends outward from the end of the lower wall area 521, and the mounting portion 53 has a flange structure relative to the lower wall area 521.

[0037] The mounting section 53 has a mounting hole 56 through which a fastener passes and is detachably connected to the lower base plate 10 for easy installation. The lower wall area 521 is recessed, which allows the end of the fastener to abut against the upper surface of the mounting section 53, and also allows the lower wall area 521 to be close to the cantilever beam sensor 30, improving the installation space and allowing the support part to be close to the cantilever beam sensor 30.

[0038] More preferably, the thickness of the lower wall region 521 is greater than the thickness of the upper wall region 522. The lower wall region 521, as a support and connecting part, adopts a thick-walled structure, which can improve the structural strength. The areas corresponding to the two upper wall regions 522 constitute the rotational movement area of ​​the pressure head 70, so that the upper wall region 522 protrudes outward relative to the lower wall region 521, thereby expanding the range and increasing the size of the rotational movement area.

[0039] The limiting boss 54 protrudes partially from the surface of the upper wall area 522. The limiting component 60 and the limiting boss 54 are snapped together to connect the upper pressure plate 20 and the support frame 50, forming a limiting fit. The limiting component 60 includes a limiting bolt 61 and a limiting nut 62, with the limiting nut 62 screwed onto the limiting bolt 61.

[0040] The limiting boss 54 includes a stepped limiting groove 57 and a through hole 58. The limiting groove 57 has a limiting surface, which can accommodate the limiting nut 62, and the limiting surface can prevent the limiting thread from rotating. The limiting nut 62 is snapped into the limiting groove 57, and the limiting bolt 61 passes through the through hole 58 from bottom to top and is screwed to the limiting nut 62. The limiting bolt 61 is screwed to the upper pressure plate 20.

[0041] When the limiting bolt 61 and the limiting nut 62 close and clamp the limiting boss 54, a locking connection is formed between the upper pressure plate 20 and the support frame 50. When the limiting bolt 61 is unscrewed to loosen the clamping of the limiting boss 54, the upper pressure plate 20 forms a floating connection, and the end of the limiting bolt 61 can limit the maximum downward off-center load of the upper pressure plate 20.

[0042] In one embodiment, the support frame 50 is integrally formed, for example, the support frame 50 is made of cast steel or is made by die casting to form an integral structure.

[0043] In another embodiment, the support frame 50 is welded. The top wall 51, the two side vertical walls 52, and the mounting part 53 are formed by bending metal sheets. The limiting boss 54 is a block structure that is welded and fixed to the vertical wall 52 to form an integral structure, which reduces the amount of welding and increases the overall structural strength.

[0044] like Figures 1 to 3 As shown, in the weighing module disclosed in the above embodiments, the weighing module further includes a conductive component 80, which connects the upper pressure plate 20 and the lower base plate 10. The conductive component 80 includes a conductive cable 81 and conductive elements 82 located at both ends of the conductive cable 81. The conductive elements 82 at both ends are respectively connected to the upper pressure plate 20 and the lower base plate 10 by fasteners to prevent current from flowing through the cantilever beam sensor 30 and to prevent damage to the cantilever beam sensor 30 in the event of leakage or lightning strikes to the weighing module.

[0045] In one embodiment, the upper pressure plate 20 includes two spaced-apart countersunk holes 21, and the column portion 71 has two spaced-apart mounting holes 56. Fasteners pass through the countersunk holes 21 and connect to the mounting holes 56 to lock the pressure head 70. The countersunk holes 21 are spaced-apart, and the center line connecting the two countersunk holes 21 is perpendicular to the length direction of the cantilever beam sensor 30. Hex socket head cap screws pass through the countersunk holes 21 and connect to the pressure head 70. The two hex socket head cap screws jointly position the pressure head 70, which can prevent rotation and improve the tightness of the connection.

[0046] The press head 70 presses against the press-fit foot 31. The press head 70 has a recessed press head hole 73, the center line of which coincides with the center line of the press head 70. The press-fit foot 31 is inserted into the press head hole 73, and the press head 70 defines the press-fit foot 31. The end of the press-fit foot 31 is in close contact with the bottom of the press head hole 73. The end of the press-fit foot 31 has a spherical curved surface. The press head hole 73 is a countersunk hole structure. The spherical curved surface abuts against the bottom surface of the press head hole 73, maintaining an arc-shaped contact and providing a good contact effect.

[0047] Preferably, the press-fit foot 31 is fitted with a rubber ring 32, the outer diameter of the rubber ring 32 is larger than the outer diameter of the press-fit foot 31, and the rubber ring 32 and the hole wall of the press head hole 73 elastically abut against each other to form an elastic abutment.

[0048] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary technical means in the art that are not disclosed in this invention.

Claims

1. A weighing module based on a cantilever beam sensor, the weighing module comprising a lower base plate, an upper pressure plate, a load-bearing block, and a cantilever beam sensor, wherein the cantilever beam sensor is equipped with press-fit feet, and fastening bolts pass through the cantilever beam sensor and the load-bearing block and are locked to the lower base plate, characterized in that, The weighing module also includes a pressure head, a support frame, and a limiting component snapped onto the support frame. The support frame is U-shaped and detachably installed on the lower base plate. The support frame has a through limiting hole, which includes a central area and clearance areas extending from both sides of the central area. The pressure head is detachably installed on the upper pressure plate. The pressure head includes a column and limiting protrusions protruding from both sides of the column. After the pressure head is inserted into the limiting hole, it rotates and presses against the pressing support foot. The limiting protrusions and the clearance area are misaligned.

2. The weighing module according to claim 1, characterized in that, The support frame includes a top wall portion, vertical wall portions that bend from both sides of the top wall portion, a limiting boss that partially protrudes from the vertical wall portion, and a mounting portion that bends from the end of the vertical wall portion. The width of the top wall portion is greater than the opening width corresponding to the two vertical wall portions. The mounting portion has mounting holes, fasteners pass through the mounting holes and are detachably connected to the lower base plate, and the limiting component and the limiting boss are snap-fitted together.

3. The weighing module according to claim 2, characterized in that, The vertical wall portion includes a relatively curved upper wall area and a lower wall area. The distance between the two sets of lower wall areas is smaller than the distance between the two sets of upper wall areas. The mounting portion bends from the end of the lower wall area, and the limiting boss partially protrudes from the surface of the upper wall area.

4. The weighing module according to claim 3, characterized in that, The thickness of the lower wall region is greater than the thickness of the upper wall region.

5. The weighing module according to claim 3, characterized in that, The limiting boss includes a stepped limiting groove and a through hole. The limiting assembly includes a limiting bolt and a limiting nut. The limiting nut is snapped into the limiting groove. The limiting bolt passes through the through hole and is spirally connected to the limiting nut and the upper pressure plate.

6. The weighing module according to claim 2, characterized in that, The support frame is integrally formed; or, the support frame is welded together.

7. The weighing module according to claim 1, characterized in that, The weighing module also includes a conductive component, which connects the upper pressure plate and the lower base plate.

8. The weighing module according to claim 1, characterized in that, The upper pressure plate includes two spaced-apart countersunk holes, and the column portion is provided with two spaced-apart mounting holes. Fasteners pass through the countersunk holes and connect to the mounting holes to lock the pressure head component.

9. The weighing module according to claim 1, characterized in that, The press head has a press head hole, and the press-fit support foot is inserted into the press head hole.

10. The weighing module according to claim 1, characterized in that, The load-bearing block suspends the cantilever beam sensor, and a deformation space is formed between the cantilever beam sensor and the lower base plate.

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