Elastomer of high-bearing strain type force transducer

Abstract

The utility model relates to an elastic body of a high-bearing strain type force transducer, and relates to the field of strain type force transducers. The device comprises a main body seat, the main body seat comprises a seat body and a top seat, the top seat is coaxially installed on the upper end face of the seat body, a center seat is vertically installed above the top seat, the center seat is arranged over the center of the top seat, and a plurality of deformation beam sets are arranged on the outer side face of the center seat; the deformation beam sets are evenly arranged in the circumferential direction of the center base, and the upper ends of the deformation beam sets are fixedly connected with the center base. According to the elastic body, through the reasonable structural design, such as the integrally-formed structure of the base body, the deformation beam set composed of the multiple layers of beam rods and the arrangement of the reinforcing pieces and the reinforcing chamfers, the overall strength and rigidity of the elastic body are enhanced, and the elastic body can bear large loads. And the elastic body is uniformly stressed by the deformation beam groups which are uniformly arranged in the circumferential direction, so that local stress concentration is avoided, and the bearing capacity is further improved.

Description

Technical Field

[0001] This application relates to the technical field of strain gauge force sensors, and in particular to an elastic body for a high-load-bearing strain gauge force sensor. Background Technology

[0002] In fields such as industrial production, engineering construction, and aerospace, accurate force measurement is a crucial step in ensuring production safety and controlling process quality. Strain gauge force sensors, as the core equipment for force measurement, directly depend on the design and performance of the elastic body. The elastic body, acting as the force-bearing deformation component of the strain gauge force sensor, undergoes minute elastic deformation when subjected to external forces. Strain gauges attached to its surface convert this deformation into a change in resistance, which is then transmitted through a measuring circuit to output an electrical signal proportional to the external force, thus achieving accurate force measurement.

[0003] In high-load-bearing scenarios, elastomers need to withstand loads of hundreds or even thousands of tons, which places stringent requirements on their structural strength, deformation uniformity, and measurement accuracy. Traditional high-load-bearing strain gauge force sensors often use a single solid column or simple beam structure as the elastomer. From a structural strength perspective, while solid column elastomers can withstand large loads, their high overall rigidity leads to concentrated deformation in localized areas under stress, resulting in uneven strain distribution at the strain gauge bonding points and lower measurement accuracy. Some elastomers use high-hardness alloy materials (such as 40CrNiMoA) to improve strength, but this increases material brittleness, making them prone to fatigue cracks under alternating loads and shortening their service life. Utility Model Content

[0004] In order to achieve high load-bearing capacity during measurement, this application provides an elastic body for a high-load-bearing strain gauge force sensor.

[0005] The elastic body of the high-load-bearing strain gauge force sensor provided in this application adopts the following technical solution:

[0006] An elastic body for a high-load-bearing strain gauge force sensor includes a main body base, which comprises a base body and a top base. The top base is coaxially mounted on the upper end face of the base body. A central base is vertically mounted above the top base, positioned directly above the center of the top base. Several sets of deformable beams are arranged on the outer surface of the central base. The deformable beams are evenly arranged along the circumference of the central base, with the upper end of each deformable beam fixedly connected to the central base and the lower end fixedly connected to the top base. Strain gauges are also provided on the deformable beams, and the strain gauges are adhered and fixed to the deformable beams.

[0007] By adopting the above technical solution, the main body of the elastomer consists of a base and a top base. This structural design gives the elastomer good overall stability. The central base is located above the top base and is connected to the top base through a deformable beam assembly. When the elastomer is subjected to external force, the central base transmits the force to the deformable beam assembly, causing the beam assembly to deform. Strain gauges are attached to the deformable beam assembly, which can accurately measure the strain of the beam assembly, thereby converting the force signal into an electrical signal and realizing force measurement. The uniformly arranged deformable beam assembly in the circumferential direction allows the elastomer to bear loads more evenly, avoiding local stress concentration and improving the load-bearing capacity and measurement accuracy of the elastomer.

[0008] Optionally, the seat body includes a base portion and a middle seat portion, the middle seat portion is mounted on the upper end surface of the base portion, and the middle seat portion and the base portion are integrally formed.

[0009] By adopting the above technical solution, the seat body uses a one-piece molded structure for the base and middle seat, which enhances the overall strength and stability of the seat body. The one-piece molding design reduces stress concentration at the connection points, allowing the seat body to better withstand loads from above, providing a solid support foundation for the entire elastomer, and helping to improve the reliability of the elastomer under high load conditions.

[0010] Optionally, the top seat adopts a ring structure, and the inner side of the upper end of the top seat is provided with a supporting inclined surface for the installation of the deformable beam assembly.

[0011] By adopting the above technical solution, the top support uses a ring structure, which not only reduces its own weight but also provides suitable space for the installation of the deformable beam assembly. The supporting slope on the inner side of the upper end of the top support provides stable installation support for the deformable beam assembly, enabling accurate positioning and installation. This ensures that the deformable beam assembly can deform according to design requirements under stress, improving the accuracy of strain gauge measurements.

[0012] Optionally, a positioning shaft hole is provided at the center of the base, and the positioning shaft hole passes through the upper and lower ends of the base.

[0013] By adopting the above technical solution, a positioning shaft hole opened at the center of the base body runs through both the upper and lower ends of the base body. This positioning shaft hole can be used to install a positioning shaft, which facilitates the installation and positioning of the elastomer. At the same time, the positioning shaft hole is coaxial with the shaft tube of the center base, which helps to ensure the overall coaxiality of the elastomer, enabling the elastomer to deform evenly under force, thereby improving the accuracy and stability of the measurement.

[0014] Optionally, the center seat includes a shaft tube and a connecting flange. The shaft tube is vertically arranged above the top seat and is coaxial with the positioning shaft hole. The connecting flange is fixedly installed on the upper end face of the shaft tube.

[0015] By adopting the above technical solution, the center seat consists of a shaft tube and a connecting flange. The shaft tube is coaxially set with the positioning shaft hole, ensuring the coaxiality of the center seat and the seat body. The connecting flange is fixedly installed on the upper end of the shaft tube, which facilitates the connection between the elastomer and external equipment, enabling the elastomer to be easily applied to different force measurement scenarios and improving the versatility and practicality of the elastomer.

[0016] Optionally, the connecting flange is provided with several sets of connecting holes evenly distributed along the circumferential direction, and the lower end face of the connecting flange is also provided with several sets of reinforcing plates connected to the shaft tube.

[0017] By adopting the above technical solution, the connection holes on the connecting flange can be used for bolt connection with external equipment, facilitating the installation and disassembly of the elastomer. The reinforcing plate is installed on the lower end face of the connecting flange and connected to the shaft tube, enhancing the connection strength between the connecting flange and the shaft tube, improving the overall stability of the center seat, and enabling the center seat to better maintain structural integrity under heavy loads, thus ensuring the normal operation of the elastomer.

[0018] Optionally, the deformable beam assembly includes a top beam, a middle beam, and a bottom beam, which are evenly installed from top to bottom between the supporting inclined surface and the shaft tube.

[0019] By adopting the above technical solution, the deformable beam assembly consists of a top beam, a middle beam, and a bottom beam. This multi-layered beam structure design increases the overall strength and stiffness of the deformable beam assembly. The beams, evenly installed from top to bottom between the supporting inclined surface and the shaft tube, can more evenly bear the force from the central seat, making the deformation of the deformable beam assembly more uniform under stress, thus improving the accuracy of strain gauge measurements and the load-bearing capacity of the elastic body.

[0020] Optionally, a reinforcing chamfer is provided between the top beam and the supporting ramp.

[0021] By adopting the above technical solution, the reinforced chamfer between the top beam and the supporting slope can effectively reduce stress concentration at the connection between the top beam and the supporting slope. When the elastic body is under load, the reinforced chamfer can distribute stress more evenly, improve the strength and stability of the connection, extend the service life of the deformable beam assembly, and thus improve the overall reliability of the elastic body.

[0022] In summary, this application includes at least one of the following beneficial technical effects: The elastomer of this application, through a reasonable structural design, such as the integrally molded structure of the base, the deformable beam group composed of multiple beams, and the setting of reinforcing plates and reinforcing chamfers, enhances the overall strength and stiffness of the elastomer, enabling it to withstand larger loads. The deformable beam group, evenly arranged in the circumferential direction, ensures uniform stress distribution on the elastomer, avoiding local stress concentration and further improving its load-bearing capacity, making it suitable for high-load force measurement applications. Strain gauges are attached to the deformable beam group, which deforms uniformly under stress, allowing the strain gauges to accurately measure strain and convert force signals into precise electrical signals. Simultaneously, the coaxial arrangement of the positioning shaft hole and shaft tube ensures the overall coaxiality of the elastomer, improving measurement accuracy and stability, and meeting the needs of applications requiring high measurement accuracy. The connection holes on the connecting flange facilitate connection between the elastomer and external equipment, enabling the elastomer to be applied in different force measurement scenarios. This design improves the versatility and practicality of the elastomer, meeting the needs of different users. Attached Figure Description

[0023] Figure 1 This is a perspective view of the overall structure in the embodiments of this application.

[0024] Figure 2 yes Figure 1 Front view of the device shown.

[0025] Figure 3 yes Figure 1 Top view of the device shown.

[0026] Figure 4 yes Figure 1 Side view of the device shown.

[0027] Figure 5 yes Figure 4 The device shown is a cross-sectional view along the AA direction.

[0028] Explanation of reference numerals in the attached drawings: 1. Main seat; 11. Seat body; 111. Base portion; 112. Middle seat portion; 113. Positioning shaft hole; 12. Top seat; 121. Supporting inclined surface; 2. Center seat; 21. Shaft tube; 22. Connecting flange; 221. Connecting hole; 222. Reinforcing plate; 3. Deformable beam assembly; 31. Top beam; 311. Reinforcing chamfer; 32. Middle beam; 33. Bottom beam; 4. Strain gauge. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses an elastic body for a high-load-bearing strain gauge force sensor. (Refer to...) Figure 1 , Figure 2 and Figure 3As shown, an elastic body for a high-load-bearing strain gauge force sensor includes a main body 1, which comprises a base 11 and a top seat 12. The top seat 12 is coaxially mounted on the upper surface of the base 11. A central seat 2 is vertically mounted above the top seat 12, positioned directly above the center of the top seat 12. Several sets of deformable beam groups 3 are arranged on the outer surface of the central seat 2, uniformly arranged along the circumference of the central seat 2. The upper end of the deformable beam group 3 is fixedly connected to the central seat 2, and the lower end of the deformable beam group 3 is fixedly connected to the top seat 12. Strain gauges 4 are also provided on the deformable beam group 3 and are bonded and fixed to the deformable beam group 3. The main body 1 of this elastic body is composed of a base 11 and a top seat 12. This structural design gives the elastic body good overall stability. The central seat 2 is positioned above the top seat 12 and connected to the top seat 12 through the deformable beam group 3. When the elastic body is subjected to external force, the central seat 2 transmits the force to the deformable beam group 3, causing the deformable beam group 3 to deform. Strain gauges 4 are attached to the deformable beam assembly 3, enabling accurate measurement of the strain of the beam assembly 3 and thus converting the force signal into an electrical signal for force measurement. The uniformly arranged deformable beam assembly 3 along its circumference allows for more uniform stress distribution on the elastic body under load, avoiding localized stress concentration and improving the load-bearing capacity and measurement accuracy of the elastic body. The components of the elastic body in this invention can be made of high-strength alloy steel, such as 40CrNiMoA. This material has high strength, hardness, and good toughness, meeting the performance requirements of the elastic body under high load conditions. The strain gauges 4 can be foil strain gauges, such as the BF350-3AA model, which have advantages such as high accuracy and good stability.

[0031] Reference Figure 1 , Figure 2 and Figure 4As shown, the seat 11 includes a base portion 111 and a middle seat portion 112. The middle seat portion 112 is mounted on the upper end face of the base portion 111, and the middle seat portion 112 is integrally formed with the base portion 111. The seat 11 adopts a structure in which the base portion 111 and the middle seat portion 112 are integrally formed, which enhances the overall strength and stability of the seat 11. The integral design reduces stress concentration at the connection points, allowing the seat 11 to better withstand loads from above, providing a solid support foundation for the entire elastomer, and helping to improve the reliability of the elastomer under high load conditions. The top seat 12 adopts a ring structure, and the inner side of the upper end of the top seat 12 is provided with a support slope 121 for the installation of the deformable beam assembly 3. The ring structure of the top seat 12 not only reduces its own weight, but also provides suitable space for the installation of the deformable beam assembly 3. The supporting inclined surface 121 on the inner side of the upper end of the top seat 12 provides stable installation support for the deformable beam assembly 3, enabling accurate positioning and installation of the deformable beam assembly 3. This ensures that the deformable beam assembly 3 deforms according to design requirements under stress, improving the accuracy of strain gauge 4 measurements. A positioning shaft hole 113 is provided at the center of the seat body 11, penetrating both the upper and lower ends of the seat body 11. This positioning shaft hole 113 can be used to install a positioning shaft, facilitating the installation and positioning of the elastic body. Simultaneously, the positioning shaft hole 113 is coaxially aligned with the shaft tube 21 of the center seat 2, helping to ensure the overall coaxiality of the elastic body, enabling uniform deformation of the elastic body under stress, and improving measurement accuracy and stability.

[0032] Reference Figure 2 and Figure 3 As shown, the center seat 2 includes a shaft tube 21 and a connecting flange 22. The shaft tube 21 is vertically positioned above the top seat 12 and is coaxial with the positioning shaft hole 113. The connecting flange 22 is fixedly installed on the upper end face of the shaft tube 21. The center seat 2 is composed of the shaft tube 21 and the connecting flange 22. The coaxiality of the shaft tube 21 and the positioning shaft hole 113 ensures the coaxiality of the center seat 2 and the seat body 11. The connecting flange 22 is fixedly installed on the upper end face of the shaft tube 21, facilitating the connection of the elastomer with external equipment, enabling the elastomer to be easily applied in different force measurement scenarios, and improving the versatility and practicality of the elastomer. Several sets of connecting holes 221 are evenly opened along the circumferential direction on the connecting flange 22, and several sets of reinforcing plates 222 connected to the shaft tube 21 are also installed on the lower end face of the connecting flange 22. The connecting holes 221 on the connecting flange 22 can be used for bolt connection with external equipment, facilitating the installation and disassembly of the elastomer. The reinforcing plate 222 is installed on the lower end face of the connecting flange 22 and connected to the shaft tube 21, which enhances the connection strength between the connecting flange 22 and the shaft tube 21, improves the overall stability of the center seat 2, and enables the center seat 2 to better maintain structural integrity when subjected to large loads, thus ensuring the normal operation of the elastomer.

[0033] Reference Figure 3 and Figure 5 As shown, the deformable beam assembly 3 includes a top beam 31, a middle beam 32, and a bottom beam 33, which are evenly installed from top to bottom between the supporting inclined surface 121 and the shaft tube 21. This multi-layered beam structure design increases the overall strength and stiffness of the deformable beam assembly 3. The beams evenly installed from top to bottom between the supporting inclined surface 121 and the shaft tube 21 can more evenly bear the force from the central seat 2, making the deformation of the deformable beam assembly 3 more uniform under stress, thus improving the accuracy of the strain gauge 4 measurement and the load-bearing capacity of the elastic body. A reinforcing chamfer 311 is provided between the top beam 31 and the supporting inclined surface 121. The reinforcing chamfer 311 between the top beam 31 and the supporting inclined surface 121 effectively reduces stress concentration at the connection between the top beam 31 and the supporting inclined surface 121. When the elastomer is under load, the reinforced chamfer 311 can make the stress distribution more uniform, improve the strength and stability of the connection, extend the service life of the deformable beam group 3, and thus improve the reliability of the entire elastomer.

[0034] The implementation principle of the elastic body of the high-load-bearing strain gauge force sensor in this application embodiment is as follows: In practical use, it is necessary to measure the pressure of large mechanical equipment, requiring the force sensor to have high load-bearing capacity and measurement accuracy. The elastic body of the high-load-bearing strain gauge force sensor of this invention is connected to the pressure application part of the mechanical equipment through the connection hole 221 on the connecting flange 22, and the base 11 is fixed to the mounting foundation with bolts. When the mechanical equipment applies pressure, the central seat 2 transmits the force to the deformable beam group 3, causing the deformable beam group 3 to deform. The strain gauge 4 measures the strain of the deformable beam group 3 and converts the force signal into an electrical signal output. Actual testing shows that this elastic body can accurately measure the pressure of the mechanical equipment with high measurement accuracy and high load-bearing capacity, meeting the force measurement requirements of industrial production lines.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elastic body for a high-load-bearing strain gauge force sensor, comprising a main body (1), characterized in that: The main body (1) includes a seat body (11) and a top seat (12). The top seat (12) is coaxially mounted on the upper end face of the seat body (11). A center seat (2) is vertically mounted above the top seat (12). The center seat (2) is located directly above the center of the top seat (12). Several sets of deformable beam groups (3) are arranged on the outer side of the center seat (2). The deformable beam groups (3) are evenly arranged along the circumferential direction of the center seat (2). The upper end of the deformable beam group (3) is fixedly connected to the center seat (2). The lower end of the deformable beam group (3) is fixedly connected to the top seat (12). Strain gauges (4) are also provided on the deformable beam group (3). The strain gauges (4) are glued and fixed to the deformable beam group (3).

2. The elastic body of a high-load-bearing strain gauge force sensor according to claim 1, characterized in that: The seat (11) includes a base portion (111) and a middle seat portion (112). The middle seat portion (112) is installed on the upper end surface of the base portion (111), and the middle seat portion (112) and the base portion (111) are integrally formed.

3. The elastic body of a high-load-bearing strain gauge force sensor according to claim 2, characterized in that: The top seat (12) adopts a ring structure, and the inner side of the upper end of the top seat (12) is provided with a support slope (121) for the installation of the deformable beam group (3).

4. The elastic body of a high-load-bearing strain gauge force sensor according to claim 3, characterized in that: A positioning shaft hole (113) is provided at the center of the seat (11), and the positioning shaft hole (113) passes through the upper and lower ends of the seat (11).

5. The elastic body of a high-load-bearing strain gauge force sensor according to claim 4, characterized in that: The center seat (2) includes a shaft tube (21) and a connecting flange (22). The shaft tube (21) is vertically arranged above the top seat (12), and the shaft tube (21) is coaxially arranged with the positioning shaft hole (113). The connecting flange (22) is fixedly installed on the upper end face of the shaft tube (21).

6. The elastic body of a high-load-bearing strain gauge force sensor according to claim 5, characterized in that: The connecting flange (22) is provided with several sets of connecting holes (221) evenly distributed along the circumferential direction, and the lower end face of the connecting flange (22) is also provided with several sets of reinforcing plates (222) connected to the shaft tube (21).

7. The elastic body of a high-load-bearing strain gauge force sensor according to claim 6, characterized in that: The deformable beam assembly (3) includes a top beam (31), a middle beam (32) and a bottom beam (33), which are evenly installed from top to bottom between the support slope (121) and the shaft tube (21).

8. The elastic body of a high-load-bearing strain gauge force sensor according to claim 7, characterized in that: A reinforcing chamfer (311) is provided between the top beam (31) and the supporting inclined surface (121).

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