A tensile and compressive bidirectional force sensor

Abstract

The utility model relates to a kind of tension and compression bidirectional force sensor, tension and compression bidirectional force sensor include elastomer, strain gauge assembly and control board unit.Elastomer is equipped with deformation hole, mounting groove, two deformation grooves, upper connecting hole and lower connecting hole, deformation hole penetrates elastomer, two deformation grooves are distributed in the side wall body of elastomer, the lower connecting hole and mounting groove are located in the other side wall body of elastomer, the upper connecting hole and the lower connecting hole are oppositely arranged, and one of deformation grooves is communicated with mounting groove by communicating hole.The strain gauge assembly is correspondingly attached to deformation groove, the control board unit is located in mounting groove, and the wire of the strain gauge assembly is connected to control board unit by communicating hole.The deformation groove is distributed in the two sides of upper connecting hole, and when elastomer is subjected to tension or pressure, it can be elastically deformed, so that the strain gauge assembly on the two sides of upper connecting hole can output corresponding electrical signal based on elastic deformation variable, to realize the effect of tension and compression bidirectional force measurement.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a bidirectional force sensor for tension and compression. Background Technology

[0002] In the field of medical equipment, medical equipment includes the main body of the device and a cover that fits the main body. To achieve accurate monitoring of the cover's status, the cover is equipped with sensors that output corresponding electrical signals based on the stress on the cover. Specifically, when the cover is in a suspended state, the sensor can withstand the lifting tension caused by the cover's own weight and output an electrical signal corresponding to the lifting tension. When the cover is placed on the main body of the device and subjected to corresponding pressure, the sensor can withstand the downward pressure generated during the covering process.

[0003] Most existing sensors can only withstand pressure in one direction and lack bidirectional force measurement capabilities, making it difficult to output electrical signals indicating tension and pressure at connection points. Furthermore, the lifting and lowering space of medical equipment covers is compact, limiting the installation space for sensors and restricting their range of motion during hoisting. Existing hoisting sensors cannot meet the technical requirements for installation in small spaces, thus necessitating improvement. Utility Model Content

[0004] To overcome the problems existing in related technologies, this utility model provides a bidirectional force sensor for tension and compression, which solves the technical problems that the sensor is difficult to output corresponding tensile and compressive electrical signals and that the sensor has a large installation size.

[0005] According to a first aspect of the present invention, a tension-compression bidirectional force sensor is provided, the tension-compression bidirectional force sensor including an elastic body, a strain gauge assembly attached to the elastic body, and a control board unit mounted on the elastic body; The elastic body has a deformation hole, a mounting groove, two deformation grooves, an upper connecting hole, and a lower connecting hole. The deformation hole penetrates the elastic body. The two deformation grooves are distributed on one side wall of the elastic body. The upper connecting hole is located between the two deformation grooves. The lower connecting hole and the mounting groove are located on the other side wall of the elastic body. The upper connecting hole and the lower connecting hole are arranged opposite to each other. One of the deformation grooves is connected to the mounting groove through a connecting hole. The strain gauge assembly is fitted into the deformation groove, the control board unit is located in the mounting groove, and the wires of the strain gauge assembly are connected to the control board unit through the connecting hole.

[0006] In one embodiment, the two deformation grooves are connected by a guide groove, and the deformation grooves are covered with protective adhesive.

[0007] In one embodiment, the deformation hole includes two sets of thickening regions and a connecting region connecting the two sets of thickening regions. The opening size of the thickening region is larger than the opening size of the connecting region, and the upper connecting hole and the lower connecting hole intersect at the connecting region.

[0008] In one embodiment, the thickness reduction zone includes two intersecting circular slots.

[0009] In one embodiment, the upper connecting hole and the lower connecting hole are coaxially arranged.

[0010] In one embodiment, both the upper connecting hole and the lower connecting hole are configured as threaded holes.

[0011] In one embodiment, the wall thickness where the deformation groove is located is less than the wall thickness where the mounting groove is located.

[0012] In one embodiment, the mounting groove includes a rectangular area and a clearance area that partially protrudes from one side of the rectangular area, the connecting hole is disposed in the clearance area, and the control board unit is mounted in the rectangular area.

[0013] In one embodiment, the bidirectional force sensor further includes a connector assembly connected to the rectangular area.

[0014] In one embodiment, the elastomer has a length of 45mm-60mm and a height of 24mm-36mm.

[0015] The technical solution provided by the embodiments of this utility model can include the following beneficial effects: Deformation grooves are distributed on both sides of the upper connecting hole, which can elastically deform when the elastic body is subjected to tension or compression, so that the strain gauge assemblies on both sides of the upper connecting hole can output corresponding electrical signals based on the elastic deformation, realizing the effect of bidirectional force measurement in tension and compression. Both the upper and lower connecting holes can be easily connected, the elastic body has a rectangular block structure, the installation space is small, and it can withstand large pressure. 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 bidirectional force sensor based on an embodiment.

[0018] Figure 2 This is a cross-sectional schematic diagram of a tension-compression bidirectional force sensor according to one embodiment.

[0019] Figure 3 This is a top view schematic diagram of a tension-compression bidirectional force sensor according to one embodiment.

[0020] Figure 4 This is a schematic diagram illustrating an elastomer according to one embodiment.

[0021] Figure 5 This is a schematic diagram of the bottom of an elastomer according to one embodiment.

[0022] In the figure, the elastic body is 10; the deformation hole is 11; the thickening area is 111; the connection area is 112; the deformation groove is 12; the upper connection hole is 13; the lower connection hole is 14; the mounting groove is 15; the rectangular area is 151; the clearance area is 152; the guide groove is 16; the connecting hole is 17; the strain gauge assembly is 20; the control plate unit is 30; the joint assembly is 40; and the protective adhesive is 50. Detailed Implementation

[0023] 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.

[0024] like Figures 1 to 3 As shown, this utility model provides a bidirectional force sensor for tension and compression. The bidirectional force sensor includes an elastic body 10, a strain gauge assembly 20 attached to the elastic body 10, and a control board unit 30 mounted on the elastic body 10. The elastic body 10 is made of high-strength rigid materials such as alloy steel and stainless steel. To adapt to use in medical equipment, the length of the elastic body 10 is 45mm-60mm, and the height is 24mm-36mm. Specifically, the length of the elastic body 10 is set to 45mm, 46mm, 48mm, 50mm, 52mm, 55mm, and 60mm; and the height is set to 24mm, 26mm, 28mm, 30mm, 32mm, 35mm, and 36mm. The size setting of the elastic body 10 can stably withstand the weight and pressure of the medical equipment cover while meeting structural strength requirements, realizing the miniaturization design of the sensor and adapting to the technical conditions of limited installation space in medical equipment.

[0025] The elastic body 10 has a deformation hole 11, a mounting groove 15, two deformation grooves 12, an upper connecting hole 13, and a lower connecting hole 14. The deformation hole 11 extends laterally through the elastic body 10 and is arranged along the length of the elastic body 10. Taking the sensor's usage as an example, the upper connecting hole 13 is located in the upper wall portion of the deformation hole 11 (hereinafter referred to as the upper wall), and the lower connecting hole 14 is located in the lower wall portion of the deformation hole 11 (hereinafter referred to as the lower wall). The upper connecting hole 13 and the lower connecting hole 14 are arranged opposite to each other. Correspondingly, the upper connecting hole 13 is used to connect to a hoisting and fixing part such as a lifting rod, and the lower connecting hole 14 is used to connect to the cover of the equipment to be weighed. More preferably, the upper connecting hole 13 and the lower connecting hole 14 are coaxially arranged, so that the tensile force and compressive force borne by the sensor are transmitted along the same axis, avoiding unexpected deformation of the elastic body 10 due to the deviation of the force transmission direction, and improving the accuracy of the measurement data.

[0026] Preferably, both the upper connecting hole 13 and the lower connecting hole 14 are threaded holes. Threaded connections offer advantages such as secure connection and easy disassembly. For example, the boom can be bolted to the upper connecting hole 13, and the equipment cover can be bolted to the lower connecting hole 14, thus achieving a stable connection between the sensor and the equipment, while also facilitating sensor maintenance and replacement.

[0027] Two deformation grooves 12 are distributed on the upper wall of the elastic body 10, and an upper connecting hole 13 is located between the two deformation grooves 12. The strain gauge assembly 20 is correspondingly attached to the deformation grooves 12. When the upper connecting hole 13 is subjected to tensile force, the deformation grooves 12 on both sides elastically bend upward, thereby outputting an electrical signal corresponding to the tensile force. When the upper connecting hole 13 is subjected to compressive force, the deformation grooves 12 on both sides elastically bend downward, thereby outputting an electrical signal corresponding to the compressive force.

[0028] Two deformation grooves 12 are formed by recesses on the top surface of the elastic body 10 and are symmetrically distributed relative to the centerline of the upper connecting hole 13. The two deformation grooves 12 are connected by a guide groove 16 so that the two deformation grooves 12 can be connected, facilitating the unified passage of the wires of the strain gauge assembly 20.

[0029] The mounting groove 15 is configured as a lower wall, and is formed as a single groove recessed along the lower surface of the elastic body 10. The mounting groove 15 and one of the deformation grooves 12 are disposed back-to-back on the elastic body 10, and the control plate unit 30 is located within the mounting groove 15. One of the deformation grooves 12 is connected to the mounting groove 15 via a connecting hole 17. The connecting hole 17 is located away from the area corresponding to the deformation hole 11, thereby reducing the impact of drilling the connecting hole 17 on local strength weakening.

[0030] The tension-compression bidirectional force sensor has the function of measuring force in both tension and compression, and is suitable for the multi-state monitoring needs of medical equipment covers. The elastomer 10 can produce uniform and stable deformation when subjected to lifting tension and cover pressure, providing a basis for accurate force measurement.

[0031] The wires of the two strain gauge assemblies 20 pass through the connecting hole 17 and connect to the control board unit 30 in the mounting groove 15, thus forming a connected structure. The deformation groove 12 is then filled with protective adhesive 50, which enhances the bonding stability between the strain gauge assembly 20 and the elastomer 10 and protects the strain gauge assembly 20. The protective adhesive 50 is made of aging-resistant, waterproof, and dustproof silicone material, preventing the strain gauge assembly 20 from being corroded by external dust, moisture, and other impurities, effectively protecting the strain gauge assembly 20 bonded to the deformation groove 12. The deformation groove 12 and the mounting groove 15 are connected through the connecting hole 17, facilitating the connection of the wires between the strain gauge assembly 20 and the control board unit 30, simplifying the assembly process, and improving assembly efficiency.

[0032] like Figures 2 to 5 As shown, the deformation hole 11 is an important structural feature for elastic deformation in a designated area of ​​the elastic body 10. To realize bidirectional tensile and compressive measurement of the sensor, the deformation hole 11 includes two sets of thickened areas 111 and a connecting area 112 connecting the two sets of thickened areas 111. The opening size of the thickened area 111 is larger than the opening size of the connecting area 112. The deformation groove 12 corresponds to the thickened area 111, so that the tensile or compressive force is transmitted to the deformation-sensitive thickened area 111. The strain gauge assembly 20 can accurately output the electrical signal of the corresponding elastic deformation, thereby improving the force measurement accuracy.

[0033] The upper connecting hole 13 and the lower connecting hole 14 intersect at the connecting area 112. The connecting area 112 can satisfy the deformation space under pressure and can also connect the two sets of thickening areas 111 to further improve the deformation effect of the deformation area.

[0034] Preferably, the thickness reduction zone 111 includes two intersecting circular slots with the same diameter, resulting in a more uniform stress distribution in the thickness reduction zone 111 and avoiding stress concentration. The intersection of the two circular slots approximates a figure-eight shape, which facilitates processing and allows for easy adjustment of the elastic deformation effect in a specified area.

[0035] The deformation hole 11 extends along the length of the elastic body 10, wherein the thickness of the upper wall where the deformation groove 12 is located is less than the thickness of the lower wall where the mounting groove 15 is located. Placing the deformation groove 12 on the thinner upper wall increases the deformation sensitivity of that area, making it easier for the strain gauge assembly 20 to detect minute deformations, thereby improving the sensor's measurement accuracy. Placing the mounting groove 15 on the thicker lower wall ensures good stability of the control board unit 30 installation and high overall strength of the elastic body 10, allowing it to withstand greater tensile and compressive forces.

[0036] In one embodiment, the mounting groove 15 includes a rectangular area 151 and a clearance area 152 that partially protrudes from one side of the rectangular area 151. A connecting hole 17 is disposed in the clearance area 152, and the control board unit 30 is mounted in the rectangular area 151.

[0037] The large rectangular area 151 provides installation space for the control board unit 30, facilitating its positioning and fixation. The clearance area 152 extends and protrudes partially on one side, thus moving away from the installation area of ​​the control board unit 30 and intersecting with the connecting hole 17. This avoids interference between the wires and the connection points of the control board unit 30, making the wire arrangement more reasonable.

[0038] In one embodiment, the elastomer 10 has a connector hole communicating with the mounting groove 15. The tension-compression bidirectional force sensor also includes a connector assembly 40, which is installed in the connector hole. The wires of the connector assembly 40 are connected to the control board unit 30 within the rectangular area 151, thereby forming a conductive connection. The connector assembly 40 enables the control board unit 30 to connect with the weighing instrument. The connector assembly 40 is connected to the rectangular area 151, keeping the connector assembly 40 away from the upper wall, which can ensure stable transmission of the measurement signal and reduce the influence of the elastic deformation of the upper wall.

[0039] In the above embodiment, when the bidirectional force sensor is in operation, the weight of the medical device cover is transmitted to the connection area 112 of the elastic body 10 through the upper connecting hole 13 when the cover is in a suspended state, causing the elastic body 10 to undergo tensile deformation. When the cover is placed on the main body of the device, the covering pressure is transmitted to the connection area 112 of the elastic body 10 through the lower connecting hole 14, causing the elastic body 10 to undergo compressive deformation. The strain gauge assembly 20 converts the corresponding elastic deformation of the elastic body 10 into an electrical signal, which is transmitted to the control board unit 30 through wires. After processing the electrical signal, the control board unit 30 transmits it to the main control system of the medical device through the connector assembly 40, thereby realizing accurate monitoring of the lifting tension and covering pressure of the cover, providing a reliable basis for judging the condition of the cover.

[0040] 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 tensile and compressive bidirectional load cell, characterized in that, The tension-compression bidirectional force sensor includes an elastic body, a strain gauge assembly attached to the elastic body, and a control board unit mounted on the elastic body. The elastic body has a deformation hole, a mounting groove, two deformation grooves, an upper connecting hole, and a lower connecting hole. The deformation hole penetrates the elastic body. The two deformation grooves are distributed on one side wall of the elastic body. The upper connecting hole is located between the two deformation grooves. The lower connecting hole and the mounting groove are located on the other side wall of the elastic body. The upper connecting hole and the lower connecting hole are arranged opposite to each other. One of the deformation grooves is connected to the mounting groove through a connecting hole. The strain gauge assembly is fitted into the deformation groove, the control board unit is located in the mounting groove, and the wires of the strain gauge assembly are connected to the control board unit through the connecting hole.

2. The bidirectional tensile and compressive load cell according to claim 1, characterized in that, The two deformation grooves are connected by a guide groove, and the deformation grooves are covered with protective adhesive.

3. The bidirectional tensile and compressive load cell according to claim 2, characterized in that, The deformation hole includes two sets of thickening areas and a connecting area connecting the two sets of thickening areas. The opening size of the thickening area is larger than the opening size of the connecting area. The upper connecting hole and the lower connecting hole intersect at the connecting area.

4. The bidirectional tensile and compressive load cell according to claim 3, characterized in that, The thickness reduction zone includes two intersecting circular grooves.

5. The bidirectional tensile and compressive load cell of claim 1, wherein, The upper connecting hole and the lower connecting hole are coaxially arranged.

6. The bidirectional tensile and compressive load cell of claim 5, wherein, Both the upper and lower connecting holes are threaded holes.

7. The bidirectional tensile and compressive load cell of claim 1, wherein, The wall thickness where the deformation groove is located is less than the wall thickness where the mounting groove is located.

8. The bidirectional tensile and compressive load cell of claim 7, wherein, The mounting slot includes a rectangular area and a clearance area that partially protrudes from one side of the rectangular area. The connecting hole is disposed in the clearance area, and the control board unit is mounted in the rectangular area.

9. The bidirectional tensile and compressive load cell of claim 8, wherein, The bidirectional force sensor also includes a connector assembly, which is connected to the rectangular area.

10. The bidirectional tensile and compressive load cell according to any one of claims 1-9, characterized in that, The elastomer has a length of 45mm-60mm and a height of 24mm-36mm.

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