Mechanical sensor tension and compression force metering device

Abstract

The application belongs to the technical field of mechanical sensors, and discloses a mechanical sensor tension and compression force measuring device, which comprises a tension and compression force measuring body and a lead wire, the lead wire is arranged on one side of the tension and compression force measuring body, a plurality of threaded holes are formed in the top end of the tension and compression force measuring body, a limiting bolt is arranged in each of the threaded holes, a round sleeve is fixedly arranged on one end of the tension and compression force measuring body, a plurality of rotating strips are slidably arranged in the round sleeve, an abutting strip is arranged on one end of each of the rotating strips, an L-shaped plate is arranged on the top of each of the abutting strips, the bottom surface of the sealing cover gradually approaches the top of the threaded hole, so that the limiting bolt is prevented from being corroded by external moisture, the corrosion reduces the strength of the bolt and reduces the application of the pre-tightening force, the lubricant gradually flows out of the overflow hole and penetrates into the contact part between the limiting bolt and the threaded hole, the lubricant can fill the thread gap, prevent the invasion of moisture and corrosive medium, and form a sealing film after solidification.

Description

Technical Field

[0001] This invention belongs to the field of mechanical sensor technology, specifically a mechanical sensor tensile and compressive force measuring device. Background Technology

[0002] In the fields of industrial production, scientific research experiments, and engineering testing, mechanical sensors and tensile / compressive force measurement devices are core equipment for achieving accurate force measurement. Their performance directly affects the reliability of product quality control, material property analysis, and engineering safety assessment. With the improvement of industrial automation and the increasing requirements for scientific research precision, the market has placed higher demands on the measurement accuracy, long-term stability, and environmental adaptability of tensile / compressive force measurement devices. However, existing tensile / compressive force measurement devices still have many technical defects in practical applications and are difficult to meet the requirements of use in complex scenarios. The core working principle of mechanical sensors is to convert the "force" that cannot be directly measured into an "electrical signal" that can be accurately measured. There is an elastic body inside the sensor. When an external force is applied to the elastic body, it will produce an extremely small but strictly proportional deformation. By measuring this small deformation, the magnitude of the force can be deduced. When the elastic body deforms due to the force, the strain gauges attached to its surface also deform along with it, and their resistance values ​​change slightly. The Wheatstone bridge composed of strain gauges converts the resistance change into a weak millivolt-level voltage signal. This signal is sent to a transmitter or amplifier for amplification, filtering, and standardization.

[0003] However, the existing mechanical sensor tensile and compressive force measuring device is not perfect and still has certain shortcomings:

[0004] The mechanical sensor tension and compression measuring device is limited in the pressure-applying equipment by bolts. The threaded hole and bolt are in an open state, and moisture in the outside air can easily penetrate into the gap between the two contact surfaces. The bolt surface will gradually rust due to moisture. Rust will reduce the strength of the bolt, so it is easy to break under load. The friction coefficient of the bolt surface will decrease, affecting the application of preload and resulting in insufficient clamping force. The contact stiffness between the sensor and the mounting base will change, resulting in unstable measurement results. When replacing the measuring device, the rusted threads will be stuck, making it difficult to disassemble and replace the device, and may even damage the threads of the sensor body. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanical sensor tensile and compressive strength measuring device to solve the problems mentioned in the background art, such as corrosion reducing bolt strength, making them prone to breakage under load, reducing the friction coefficient of the bolt surface, affecting the application of preload, resulting in insufficient clamping force, and changes in contact stiffness between the sensor and the mounting base, leading to unstable measurement results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mechanical sensor tension and compression measuring device, comprising a tension and compression measuring body and a wire, wherein the wire is disposed on one side of the tension and compression measuring body, the top end of the tension and compression measuring body is provided with multiple threaded holes, each of the multiple threaded holes is provided with a limit bolt, one end of the tension and compression measuring body is fixedly fitted with a circular sleeve, multiple rotating strips are slidably installed inside the circular sleeve, one end of each of the multiple rotating strips is provided with an abutment strip, the top of each of the multiple abutment strips is provided with an L-shaped plate, one side of each of the multiple L-shaped plates is provided with a support frame, one side of each of the multiple support frames is provided with a sealing cover, the top of the tension and compression measuring body is provided with multiple binding sleeves, both sides of the outer wall of each of the multiple sealing covers are provided with fitting sleeves, the inside of each of the multiple limit bolts is bonded with a sealing film, and the inner layer of each of the multiple sealing films is filled with lubricant.

[0007] Preferably, each of the multiple support frames has an embedded rod fixedly installed inside, and the other end of the tension and pressure measuring body is fitted with an extension sleeve, with multiple extension strips inserted and connected to one side of the extension sleeve.

[0008] Preferably, one end of each of the plurality of embedded rods is movably fitted with a movable block, one end of each of the plurality of extended strips is fixedly connected to one side of the plurality of movable blocks, and one side of each of the plurality of sealing covers is fixedly installed with an L-shaped block.

[0009] Preferably, one side of each of the L-shaped blocks is fixedly connected to the other side of the multiple movable blocks. By moving the extension sleeve up and down, the multiple movable blocks move up and down at one end of the embedded rod, and the bottom surface of the sealing cover gradually covers the threaded hole to achieve sealing.

[0010] Preferably, one side of each of the plurality of fitting sleeves is fixedly connected to both sides of the plurality of sealing covers, the bottom of each of the plurality of restraint sleeves is fixedly connected to the top of the tension and pressure measuring body, and a second restraint block is fixedly installed on both sides of each of the plurality of restraint sleeves.

[0011] Preferably, each of the second binding blocks has two recessed holes at its top, each of the multiple fitting sleeves has a first binding block fixedly installed on both sides, and each of the multiple first binding blocks has two protruding strips fixedly installed at its bottom. One end of each of the protruding strips is respectively engaged with the interior of the multiple recessed holes.

[0012] Preferably, the diameter of each of the plurality of concave holes is larger than the diameter of each of the plurality of convex strips, and the positions of two adjacent convex strips are corresponding.

[0013] Preferably, each of the plurality of sealing covers has a pressure-applying component movably installed inside, each of the plurality of limiting bolts has an overflow hole at its top, the plurality of sealing films are respectively disposed inside the plurality of overflow holes, a first protruding plate is fixedly installed on one side of the extension sleeve, a first magnet is provided at the bottom of the first protruding plate, a second protruding plate is fixedly installed on one side of one of the support frames, and a second magnet is provided on one side of the second protruding plate.

[0014] Preferably, each of the multiple pressure-applying components has a pin fixedly installed at its bottom end, and the multiple pins are respectively located on top of multiple sealing membranes, with the first magnet and the second magnet being magnetically connected.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention utilizes a combination of a circular sleeve, rotating bars, inserting rods, moving blocks, sealing covers, ejector pins, sealing membranes, and lubricant. Rotating the extension sleeve transmits force to multiple rotating bars, which then rotate within the circular sleeve. This allows adjustment of the position between the sealing cover and the threaded hole, providing space for the limit bolt to connect threadedly to the threaded hole. After threaded connection, rotating the extension sleeve in the opposite direction positions the sealing cover directly above the threaded hole. Continuing to move the extension sleeve downwards causes the moving blocks to move downwards at one end of their respective inserting rods, gradually bringing the bottom surface of the sealing cover closer to the top of the threaded hole. When the two come into contact, they achieve a seal, preventing external moisture from contacting the limit bolt and causing corrosion. Corrosion reduces the bolt strength, reduces the preload applied, and leads to insufficient clamping force, thereby improving the stability of the metering device and equipment installation. Pressing down the pressure-applying component successively moves the ejector pin downwards. The tip of the ejector pin pierces the sealing film, causing it to detach from the overflow hole cavity. Lubricant gradually flows out from the overflow hole and penetrates into the contact part between the limit bolt and the threaded hole. The lubricant can fill the thread gap and prevent moisture and corrosive media from entering. After curing, it forms a sealing film, which facilitates future disassembly.

[0017] This invention utilizes the cooperation of a first convex plate, a first magnet, a second convex plate, a second magnet, an abutment strip, and an extension sleeve. After the sealing cover seals the threaded hole, one end of each of the multiple convex strips gradually embeds into the interior of the concave hole. The two engage, thus achieving limitation and fixation, further enhancing the firmness of the connection between the sealing cover and the tension and pressure measuring body. At this time, as the extension sleeve moves downward, the first magnet gradually approaches the second magnet. After the two adhere, under the action of magnetic connection, the stability of the limitation between the extension sleeve and the limiting bolt is reinforced. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a top view of the structure of the present invention;

[0021] Figure 4 This is a partial side view of the structure of the present invention;

[0022] Figure 5 This is a partial bottom view of the structure of the present invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0024] Figure 7 This is a partial front view schematic diagram of the structure of the present invention;

[0025] Figure 8 This is a partial frontal cross-sectional structural diagram of the present invention.

[0026] In the diagram: 1. Tension / compression metering body; 2. Wire; 3. Threaded hole; 4. Limiting bolt; 5. Circular sleeve; 6. Rotating bar; 7. Abutment bar; 8. L-shaped plate; 9. Support frame; 10. Embedded rod; 11. Moving block; 12. Extension sleeve; 13. Extension bar; 14. L-shaped block; 15. Sealing cover; 16. Fitting sleeve; 17. Binding sleeve; 18. First binding block; 19. Protruding bar; 20. Second binding block; 21. Concave hole; 22. First protruding plate; 23. First magnet; 24. Second protruding plate; 25. Second magnet; 26. Overflow hole; 27. Pressure applying component; 28. Ejector pin; 29. ​​Sealing membrane; 30. Lubricant. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 8 As shown, this embodiment of the invention provides a technical solution for a mechanical sensor tensile and compressive force measuring device:

[0029] like Figures 1-4As shown, a mechanical sensor tension / compression measuring device includes a tension / compression measuring body 1 and a wire 2. The wire 2 is disposed on one side of the tension / compression measuring body 1. Multiple threaded holes 3 are opened at the top of the tension / compression measuring body 1, and limit bolts 4 are installed inside each of the multiple threaded holes 3. A circular sleeve 5 is fixedly fitted at one end of the tension / compression measuring body 1. Multiple rotating strips 6 are slidably installed inside the circular sleeve 5. An abutment strip 7 is provided at one end of each of the multiple rotating strips 6. An L-shaped plate 8 is provided at the top of each of the multiple abutment strips 7. A support frame 9 is provided on one side of each of the multiple L-shaped plates 8. A sealing cover 15 is provided on one side of each of the multiple support frames 9. Multiple restraining sleeves 17 are provided at the top of the tension / compression measuring body 1. Fitting sleeves 16 are provided on both sides of the outer wall of each of the multiple sealing covers 15. A sealing film 29 is bonded inside each of the multiple limit bolts 4. The inner layer of each of the multiple sealing films 29 is filled with lubricant 30. The multiple rotating strips 6 can then... The internal rotation of the circular sleeve 5 allows adjustment of the position between the sealing cover 15 and the threaded hole 3, providing space for the threaded connection between the limit bolt 4 and the threaded hole 3. After the two are threadedly connected, the extension sleeve 12 is rotated in the opposite direction, so that the sealing cover 15 is directly above the threaded hole 3. The extension sleeve 12 continues to move downward, and multiple moving blocks 11 move downward at one end of the corresponding embedded rod 10. The bottom surface of the sealing cover 15 gradually approaches the top of the threaded hole 3. After the two come into contact, a seal is achieved, preventing external moisture from contacting the limit bolt 4 and causing corrosion. Corrosion will reduce the bolt strength, reduce the application of preload, and lead to insufficient clamping force, thereby improving the stability of the metering device and equipment installation. The pressure application component 27 is pressed down successively, driving the ejector pin 28 to move downward. The tip of the ejector pin 28 pierces the sealing membrane 29, causing it to detach from the inner cavity of the overflow hole 26. The lubricant 30 gradually flows out from the overflow hole 26.

[0030] like Figures 2-5 As shown, each of the multiple support frames 9 has an embedded rod 10 fixedly installed inside. The other end of the tension and pressure measuring body 1 is fitted with an extension sleeve 12. Multiple extension strips 13 are inserted and connected to one side of the extension sleeve 12. Each of the multiple embedded rods 10 has a movable block 11 movably fitted to one end. One end of each of the multiple extension strips 13 is fixedly connected to one side of each of the multiple movable blocks 11. Each of the multiple sealing covers 15 has an L-shaped block 14 fixedly installed on one side. Corrosion will reduce the strength of the bolts, reduce the application of preload, and result in insufficient clamping force, thereby improving the stability of the metering device and equipment installation. Pressing down the pressure application component 27 successively will drive the ejector pin 28 to move downward. The tip of the ejector pin 28 will pierce the sealing film 29, causing it to detach from the inner cavity of the overflow hole 26. The lubricant 30 will gradually flow out from the overflow hole 26 and penetrate into the contact part between the limit bolt 4 and the threaded hole 3. The lubricant 30 can fill the thread gap and prevent moisture and corrosive media from entering. After curing, it forms a sealing film, which is convenient for future disassembly.

[0031] like Figure 2 , Figure 7 and Figure 8 As shown, one side of each of the multiple L-shaped blocks 14 is fixedly connected to the other side of each of the multiple movable blocks 11. The extension sleeve 12 moves up and down, causing the multiple movable blocks 11 to move up and down at one end of the embedded rod 10. The bottom surface of the sealing cover 15 gradually covers the threaded hole 3 to achieve a seal. One side of each of the multiple fitting sleeves 16 is fixedly connected to both sides of each of the multiple sealing covers 15. The bottom of each of the multiple restraining sleeves 17 is fixedly connected to the top of the tension / compression metering body 1. Second restraining blocks 20 are fixedly installed on both sides of each of the multiple restraining sleeves 17. The top of each of the second binding blocks 20 has two recessed holes 21. Each of the multiple fitting sleeves 16 has a first binding block 18 fixedly installed on both sides. Each of the multiple first binding blocks 18 has two protruding strips 19 fixedly installed on its bottom. One end of each of the protruding strips 19 is engaged with the interior of the multiple recessed holes 21. After the sealing cover 15 seals the threaded hole 3, one end of each of the protruding strips 19 will gradually be embedded into the interior of the recessed hole 21. The two engage with each other, thereby achieving limitation and fixation, further enhancing the firmness of the connection between the sealing cover 15 and the tension and pressure measuring body 1.

[0032] like Figure 1 , Figure 5 and Figure 6 As shown, each of the multiple sealing covers 15 has a pressure-applying component 27 movably installed inside. Each of the multiple limiting bolts 4 has an overflow hole 26 at its top. Multiple sealing membranes 29 are respectively disposed inside the multiple overflow holes 26. A first convex plate 22 is fixedly installed on one side of the extension sleeve 12. A first magnet 23 is disposed at the bottom of the first convex plate 22. A second convex plate 24 is fixedly installed on one side of one of the support frames 9. A second magnet 25 is disposed on one side of the second convex plate 24. A pin 28 is fixedly installed at the bottom of each of the multiple pressure-applying components 27. The pins 28 are respectively located on the top of the multiple sealing membranes 29. The first magnet 23 and the second magnet 25 are magnetically connected. As the extension sleeve 12 moves downward, the first magnet 23 will gradually approach the second magnet 25. After the two are in contact, the magnetic connection will strengthen the stability of the limiting position between the extension sleeve 12 and the limiting bolts 4.

[0033] The working principle and usage of this invention: The core working principle of the mechanical sensor is to convert the "force" that cannot be directly measured into an "electrical signal" that can be accurately measured. The sensor contains an elastic body. When an external force acts on the elastic body, it produces an extremely small but strictly proportional deformation. By measuring this tiny deformation, the magnitude of the force can be deduced. When the elastic body deforms due to the force, the strain gauges attached to its surface also deform, causing a slight change in their resistance. The Wheatstone bridge formed by the strain gauges converts this resistance change into a weak millivolt-level voltage signal. This signal is sent to a transmitter or amplifier for amplification, filtering, and standardization. However, existing mechanical sensor tensile and compressive force measurement devices are not perfect. There are certain drawbacks: the mechanical sensor tension and compression measuring device is limited in the pressure-applying equipment by bolts. With the threaded hole and bolt in an open state, moisture from the outside air can easily penetrate into the gaps between the contact surfaces, causing the bolt surface to gradually corrode due to moisture. This corrosion reduces the bolt strength, making it prone to breakage under load. The reduced coefficient of friction on the bolt surface affects the application of preload, leading to insufficient clamping force. Changes in contact stiffness between the sensor and the mounting base result in unstable measurement results. When replacing the measuring device, the corroded threads become stuck, making disassembly and replacement difficult and potentially damaging the sensor body threads. Rotating the extension sleeve 12 transmits force to multiple rotating bars 6, which then rotate inside the circular sleeve 5. Rotating the extension sleeve 12 allows adjustment of the position between the sealing cover 15 and the threaded hole 3, providing space for the threaded connection between the limit bolt 4 and the threaded hole 3. After the two are threadedly connected, rotating the extension sleeve 12 in the opposite direction positions the sealing cover 15 directly above the threaded hole 3. Continuing to move the extension sleeve 12 downwards, multiple moving blocks 11 move downwards at one end of their respective embedded rods 10. The bottom surface of the sealing cover 15 gradually approaches the top of the threaded hole 3, achieving a seal upon contact. This prevents external moisture from contacting the limit bolt 4 and causing corrosion, which would reduce bolt strength, decrease preload, and result in insufficient clamping force. This improves the stability of the metering device and equipment installation. Pressing the pressure application component 27 downwards successively moves the ejector pin 28 downwards, causing the ejector pin 28 to move downwards. The tip of needle 28 pierces the sealing membrane 29, causing it to detach from the cavity of overflow hole 26. Lubricant 30 gradually flows out from overflow hole 26, penetrating into the contact area between limit bolt 4 and threaded hole 3. Lubricant 30 fills the thread gap, preventing moisture and corrosive media from entering. After curing, it forms a sealing film, facilitating future disassembly. After sealing cover 15 seals the threaded hole 3, one end of multiple protrusions 19 gradually embeds into the interior of concave hole 21. The two engage, achieving limitation and fixation, further enhancing the firmness of the connection between sealing cover 15 and tension / compression metering body 1. At this time, as extension sleeve 12 moves downward, first magnet 23 gradually approaches second magnet 25. After they adhere, under the action of magnetic connection,This reinforces the stability of the positioning between the extension sleeve 12 and the limiting bolt 4.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical sensor tension / compression measuring device, comprising a tension / compression measuring body (1) and a wire (2), wherein the wire (2) is disposed on one side of the tension / compression measuring body (1), characterized in that: The top of the tension and pressure measuring body (1) is provided with multiple threaded holes (3), and each of the multiple threaded holes (3) is provided with a limit bolt (4). A round sleeve (5) is fixedly fitted at one end of the tension and pressure measuring body (1). Multiple rotating bars (6) are slidably installed inside the round sleeve (5). Each of the multiple rotating bars (6) is provided with an abutment bar (7) at one end. Each of the multiple abutment bars (7) is provided with an L-shaped plate (8) at the top. Each of the multiple L-shaped plates (8) is provided with a support frame (9) on one side. Each of the multiple support frames (9) is provided with a sealing cover (15) on one side. The top of the tension and pressure measuring body (1) is provided with multiple binding sleeves (17). Each of the multiple sealing covers (15) is provided with a fitting sleeve (16) on both sides of the outer wall of each of the multiple sealing covers (15). Each of the multiple limit bolts (4) is bonded with a sealing film (29). The inner layer of each of the multiple sealing films (29) is filled with lubricant (30). An embedded rod (10) is fixedly installed inside each of the multiple support frames (9). An extension sleeve (12) is sleeved on the other end of the tension and pressure measuring body (1). Multiple extension strips (13) are inserted and connected to one side of the extension sleeve (12). Each of the multiple sealing covers (15) has a pressure-applying component (27) movably installed inside. Each of the multiple limiting bolts (4) has an overflow hole (26) at its top. Each of the multiple sealing films (29) is respectively disposed inside the multiple overflow holes (26). A first protruding plate (22) is fixedly installed on one side of the extension sleeve (12). A first magnet (23) is disposed at the bottom of the first protruding plate (22). A second protruding plate (24) is fixedly installed on one side of one of the support frames (9). A second magnet (25) is disposed on one side of the second protruding plate (24). Each of the pressure-applying components (27) has a pin (28) fixedly installed at its bottom end. The pins (28) are located on the top of the sealing membranes (29). The first magnet (23) and the second magnet (25) are magnetically connected.

2. The mechanical sensor tension / compression measuring device according to claim 1, characterized in that: One end of each of the multiple embedded rods (10) is movably fitted with a movable block (11), one end of each of the multiple extension strips (13) is fixedly connected to one side of each of the multiple movable blocks (11), and one side of each of the multiple sealing covers (15) is fixedly installed with an L-shaped block (14).

3. The mechanical sensor tension / compression measuring device according to claim 2, characterized in that: One side of each of the L-shaped blocks (14) is fixedly connected to the other side of each of the moving blocks (11). By moving the extension sleeve (12) up and down, the moving blocks (11) move up and down at one end of the embedded rod (10), and the bottom surface of the sealing cover (15) gradually covers the threaded hole (3) to achieve sealing.

4. The mechanical sensor tension / compression measuring device according to claim 1, characterized in that: One side of each of the multiple fitting sleeves (16) is fixedly connected to both sides of the multiple sealing covers (15), the bottom of each of the multiple binding sleeves (17) is fixedly connected to the top of the tension and pressure measuring body (1), and a second binding block (20) is fixedly installed on both sides of each of the multiple binding sleeves (17).

5. The mechanical sensor tension / compression measuring device according to claim 4, characterized in that: Two recessed holes (21) are opened at the top of each of the multiple second binding blocks (20), and first binding blocks (18) are fixedly installed on both sides of the multiple fitting sleeves (16). Two protruding strips (19) are fixedly installed at the bottom of each of the multiple first binding blocks (18), and one end of each of the multiple protruding strips (19) is respectively engaged and connected to the interior of the multiple recessed holes (21).

6. A mechanical sensor tension / compression measuring device according to claim 5, characterized in that: The diameter of each of the multiple recesses (21) is larger than the diameter of each of the multiple protrusions (19), and the positions of two adjacent protrusions (19) are corresponding.

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