Weighing sensor

Abstract

The utility model discloses a weighing sensor which comprises an elastic body and a bearing plate, the outer side of the elastic body is provided with a strain gauge and a glue coating layer, the glue coating layer covers the strain gauge, the strain gauge is integrated into a bridge circuit, one end of the elastic body is fixedly connected with a fixing block, the other end of the elastic body is fixedly connected with a supporting block, and the lower side of the fixing block is provided with a positioning block. A plurality of groups of mounting screw holes are formed in the upper side of the fixing block, vertically extend and penetrate through the positioning block, the bearing plate is provided with a bearing table, the bearing table is provided with a clamping groove matched and embedded with the positioning block, positioning screw holes in one-to-one correspondence with the plurality of groups of mounting screw holes are formed in the clamping groove, and a containing groove is formed in one side of the fixing block and transversely extends. According to the weighing sensor, the processing module and the control module are arranged in the accommodating groove, so that the space occupied by the weighing sensor can be effectively reduced, and the line arrangement of the weighing sensor is simplified.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor technology, specifically a weighing sensor. Background Technology

[0002] A load cell is a device that converts force or weight into an electrical signal. It is widely used in industries, commerce, and medicine to accurately measure the weight or force on an object.

[0003] Currently used weighing sensors have their circuit modules distributed through wires, which not only takes up space but also makes the wiring complex. Furthermore, the weighing sensors are prone to skew during installation, affecting weighing accuracy. Therefore, this utility model proposes a weighing sensor that can solve the above problems. The control module is located outside the elastic body, which takes up space and makes the wiring layout complex. Utility Model Content

[0004] The purpose of this invention is to provide a weighing sensor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a weighing sensor, comprising:

[0006] An elastomer and a support plate, wherein a strain gauge and an adhesive layer are disposed on the outer side of the elastomer, the adhesive layer covers the strain gauge, and the strain gauge is integrated into a bridge circuit;

[0007] One end of the elastic body is fixed to a fixing block, and the other end is fixed to a support block. A positioning block is provided on the lower side of the fixing block, and multiple sets of mounting screw holes are provided on the upper side of the fixing block. The multiple sets of mounting screw holes extend vertically and penetrate the positioning block.

[0008] The support plate has a support platform, the support platform has a slot that engages with the positioning block, and the slot is provided with positioning screw holes that correspond one-to-one with multiple sets of mounting screw holes;

[0009] A receiving groove is provided on one side of the fixing block, the receiving groove extends laterally, a circuit component is provided in the receiving groove, and an output cable is provided at the rear end of the fixing block.

[0010] Preferably, the circuit assembly includes a signal processing module and a control module, the bridge circuit is signal-connected to the signal processing module, the signal processing module is signal-connected to the control module, and the control module is signal-connected to the output cable.

[0011] Preferably, the output cable is a shielded cable, and the shielding layer of the output cable is grounded at one end.

[0012] Preferably, the adhesive layer is provided with an anti-corrosion coating.

[0013] Preferably, the support block is provided with a force-bearing screw hole, which extends vertically.

[0014] Preferably, a rubber pad is provided on the support plate, and the rubber pad is located below the support block.

[0015] Preferably, both the positioning block and the slot are wedge-shaped structures.

[0016] Preferably, a cover plate is hinged to one side of the fixing block, the cover plate can pivotally close the receiving groove, and a sealing strip is provided on the inner side of the cover plate, with a magnetic strip passing through the sealing strip.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By placing the processing module and control module in the receiving slot, the space occupied by the weighing sensor can be effectively reduced and the layout of the weighing circuit can be simplified. The positioning block and the slot are fitted together so that multiple sets of mounting screw holes and positioning screw holes are vertically aligned one by one. After the bolts are screwed in, they are connected and the positioning function is achieved. It is not easy for the installation to be skewed. During weighing, the elastic body is subjected to uniform force and the weighing accuracy is high. Attached Figure Description

[0019] Figure 1 This is a first-angle view of the elastomer of this utility model;

[0020] Figure 2 This is a second-angle view of the elastomer of this utility model (with the cover plate removed).

[0021] Figure 3 This is a schematic diagram of the bearing plate structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the assembly of the elastomer and the bearing plate of this utility model;

[0023] In the diagram: 10, elastomer; 101, adhesive layer; 11, fixing block; 111, mounting screw hole; 12, receiving groove; 121, signal processing module; 122, control module; 123, output cable; 124, positioning block; 13, support block; 131, force-bearing screw hole; 20, bearing plate; 21, bearing platform; 211, slot; 212, positioning screw hole; 22, rubber pad. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4

[0026] Example 1 provides a weighing sensor:

[0027] One end of the elastomer 10 is fixed to a fixing block 11, and the other end is fixed to a support block 13. A strain gauge and an adhesive layer 101 are provided on the outside of the elastomer 10. The adhesive layer 101 covers the strain gauge and provides protection for the strain gauge. The strain gauge is not shown in the figure.

[0028] The strain gauge is integrated into the bridge circuit, which is a Huisitong bridge circuit. When the support block 13 is subjected to force, it causes the elastic plate to deform, resulting in a change in resistance after the strain gauge is deformed.

[0029] A receiving groove 12 is provided on one side of the fixing block 11. The receiving groove 12 extends laterally and contains a circuit assembly. An output cable 123 is provided at the rear end of the fixing block 11.

[0030] The circuit assembly includes a signal processing module 121 and a control module 122. The bridge circuit is connected to the signal processing module 121, the signal processing module 121 is connected to the control module 122, and the control module 122 is connected to the output cable 123. When the resistance of the strain gauge changes, the bridge circuit outputs a voltage signal to the signal processing module 121 for processing. The signal processing module 121 processes, amplifies, and converts the voltage signal into a digital signal. The control module 122 converts the digital signal into a weight reading and outputs it to the display via the output cable 123. By placing the processing module and the control module 122 in the receiving slot 12, the space occupied by the weighing sensor can be effectively reduced, and the layout of the weighing circuit can be simplified.

[0031] A positioning block 124 is provided on the lower side of the fixing block 11, and multiple sets of mounting screw holes 111 are provided on the upper side of the fixing block 11. The multiple sets of mounting screw holes 111 extend vertically and penetrate the positioning block 124. The bearing plate 20 has a bearing platform 21, and the bearing platform 21 has a slot 211 that fits into the positioning block 124. The slot 211 is provided with positioning screw holes 212 that correspond one-to-one with the multiple sets of mounting screw holes 111. During installation, the positioning block 124 is fitted into the slot 211 so that the multiple sets of mounting screw holes 111 and positioning screw holes 212 are vertically aligned. Then, bolts are screwed in for connection, which plays a positioning role. It is not easy for the installation to be skewed. When weighing, the elastic body 10 is subjected to uniform force and the weighing accuracy is high.

[0032] Example 2 provides a weighing sensor:

[0033] The output cable 123 is a shielded cable, and the shielding layer of the output cable 123 is grounded at one end to avoid electromagnetic interference from frequency converters, motors, high-voltage lines, etc.

[0034] An anti-corrosion coating is provided on the outside of the adhesive layer 101 to prevent moisture or chemicals from penetrating the strain gauge.

[0035] The support block 13 is provided with a force-bearing screw hole 131, which extends vertically. The bearing plate 20 is provided with a rubber pad 22, which is located below the support block 13. The rubber pad 22 does not contact the support block 13, and there is a distance of 3mm-5mm between them. The distance can be determined according to the weight range of the weighing sensor. The rubber pad 22 plays a buffering role to avoid instantaneous overload causing strain gauge failure.

[0036] Both the positioning block 124 and the slot 211 are wedge-shaped structures, which prevents the positioning block 124 from falling off vertically after it is engaged with the slot 211, thus further improving the stability of the installation.

[0037] A cover plate is hinged to one side of the fixing block 11. The cover plate 125 can pivot to close the receiving groove 12. A sealing strip is provided on the inner side of the cover plate 125. A magnetic strip is inserted through the strip. The cover plate 125 is made of metal. The magnetic strip magnetically attracts the fixing block 11, so that the strip is attached to the fixing block 11, which seals the receiving groove 12 and prevents dust in the working environment from entering the receiving groove 12 and adhering to the signal processing module 121 and the control module 122.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weighing sensor, characterized in that, It includes an elastomer (10) and a support plate (20). The elastomer (10) is provided with a strain gauge and an adhesive layer (101) on its outer side. The adhesive layer (101) covers the strain gauge and the strain gauge is integrated into the bridge circuit. One end of the elastic body (10) is fixed to a fixing block (11), and the other end is fixed to a support block (13). A positioning block (124) is provided on the lower side of the fixing block (11), and multiple sets of mounting screw holes (111) are provided on the upper side of the fixing block (11). The multiple sets of mounting screw holes (111) extend vertically and penetrate the positioning block (124). The support plate (20) has a support platform (21), the support platform (21) has a slot (211) that fits into the positioning block (124), and the slot (211) is provided with positioning screw holes (212) that correspond one-to-one with multiple sets of mounting screw holes (111). A receiving groove (12) is provided on one side of the fixing block (11). The receiving groove (12) extends laterally. A circuit component is provided in the receiving groove (12), and an output cable (123) is provided at the rear end of the fixing block (11).

2. A weighing sensor according to claim 1, characterized in that, The circuit assembly includes a signal processing module (121) and a control module (122). The bridge circuit is signal-connected to the signal processing module (121), the signal processing module (121) is signal-connected to the control module (122), and the control module (122) is signal-connected to the output cable (123).

3. A weighing sensor according to claim 2, characterized in that, The output cable (123) is a shielded cable, and the shielding layer of the output cable (123) is grounded at one end.

4. A weighing sensor according to claim 1, characterized in that, The adhesive layer (101) is provided with an anti-corrosion coating.

5. A weighing sensor according to claim 1, characterized in that, The support block (13) is provided with a force-bearing screw hole (131), which extends vertically.

6. A weighing sensor according to claim 1, characterized in that, A rubber pad (22) is provided on the bearing plate (20), and the rubber pad (22) is located below the support block (13).

7. A weighing sensor according to claim 1, characterized in that, Both the positioning block (124) and the slot (211) are wedge-shaped structures.

8. A weighing sensor according to claim 1, characterized in that, A cover plate (125) is hinged to one side of the fixing block (11). The cover plate (125) can pivotally close the receiving groove (12). A sealing strip is provided on the inner side of the cover plate, and a magnetic strip is inserted inside the sealing strip.

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