Anti-fracture intelligent strain pressure sensor

Abstract

The utility model discloses an anti-fracture intelligent strain pressure sensor, which relates to the technical field of strain pressure sensors and comprises a strain pressure sensor main body, a force transmission seat is fixedly mounted above the surface of the strain pressure sensor main body, and the force transmission seat is in the shape of a barrel with a groove in the middle. Four sliding grooves are evenly formed in the lower portion of the inner surface of the force transmission base. Compared with an existing common strain pressure sensor, the anti-fracture intelligent strain pressure sensor has the advantages that when the strain pressure sensor main body is used for detecting pressure, the stressed pressure is more uniform and linear, so that the pressure measurement accuracy of the strain pressure sensor main body is greatly improved; in addition, the strain pressure sensor main body can be prevented from directly contacting a pressed object, that is, when the pressure is excessive, the stress plate is greatly impacted and broken, the strain pressure sensor main body is effectively prevented from being damaged and broken, the use safety of the strain pressure sensor main body is improved, and the service life of the strain pressure sensor main body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of strain pressure sensors, in particular to an anti-fracture intelligent strain pressure sensor. Background Art

[0002] A strain-type pressure sensor is a sensing device that uses elastic sensitive elements and strain gauges to convert the measured pressure into corresponding changes in resistance. According to the structure of the elastic sensitive elements, strain-type pressure sensors can be roughly divided into four types: strain tube type, diaphragm type, strain beam type and combined type.

[0003] For example, the public document with application number 202011355262.1 discloses a strain pressure sensor, which uses a patch beam with an annular groove design to connect the supporting platform, and the patch beam has arc transitions on both sides, which can smoothly transmit force during force transmission. This structure has strong resistance to eccentric loads and lateral loads, and is more economical to process. The overall height of the sensor is low, the measuring range is large, and the accuracy is high. However, when measuring the pressure of the pressure object, the strain pressure sensor directly contacts the surface of the pressure sensor. The instantaneous pressure is difficult to ensure that it is evenly distributed on the surface of the sensor, and the force on the sensor is not linear enough, resulting in low measurement accuracy. Single-point force and direct contact may also cause wear or breakage of the pressure sensor, affecting the normal use of the sensor and causing certain economic losses.

[0004] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and an anti-fracture intelligent strain pressure sensor is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a fracture-proof intelligent strain pressure sensor to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: an anti-fracture intelligent strain pressure sensor, comprising a strain pressure sensor body, a force transmission seat fixedly installed above the surface of the strain pressure sensor body, the shape of the force transmission seat is set to be a barrel with a groove in the middle, four sliding grooves are evenly distributed below the inner surface of the force transmission seat, a force distribution mechanism is arranged inside the sliding groove, a force plate is arranged above the force distribution mechanism and inside the force transmission seat, and a wiring port is arranged on the right side of the surface of the strain pressure sensor body.

[0007] Preferably, the force distribution mechanism includes a guide rod fixedly mounted on the inner surface of each sliding groove, and a sliding block is slidably provided on the surface of the guide rod.

[0008] Preferably, the force distribution mechanism further comprises a thrust spring fixedly arranged on one side of the surface of the slider, and one end of the thrust spring is sleeved and fixedly connected to the outer periphery of the guide rod and the inner surface of the sliding groove.

[0009] Preferably, the force distribution mechanism further comprises a movable rod rotatably provided on the upper end of the slider, and a four-way shaft seat is rotatably provided on the upper end of the movable rod.

[0010] Preferably, the upper surface of the four-way axle seat is fixedly connected to the force-bearing plate, and the surface of the force-bearing plate is located around the inner surface of the force transmission seat to slide in contact.

[0011] Preferably, the wiring port includes a wire insertion slot fixedly installed on the right side of the surface of the strain pressure sensor body, and the upper and lower sides of the right end of the inner surface of the wire insertion slot are rotatably provided with rubber sleeve movable plates, and the upper and lower ends of the rubber sleeve movable plates are set to an arc length that is exactly half of the wire insertion slot.

[0012] Preferably, the wiring port further comprises a spring piece fixedly arranged on the left side of the surface of the rubber sleeve movable plate, and the left end of the spring piece is fixedly connected to the inner surface of the wire insertion slot by a bolt.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model arranges the force transmission seat, sliding groove, force distribution mechanism, guide rod, slider, thrust spring, movable rod, four-way shaft seat and force plate. The force applied to the strain pressure sensor body is the force dispersed by the four movable rods and the four-way shaft seat. This makes the pressure received by the strain pressure sensor body more uniform and linear during pressure detection, thereby greatly improving the accuracy of pressure measurement by the strain pressure sensor body. Moreover, the pressure is measured in a transmission manner through the force transmission seat, force distribution mechanism and force plate, avoiding direct contact between the strain pressure sensor body and the pressure object. That is, when the pressure is excessive, the force plate is subjected to a large impact and shattered, effectively preventing the strain pressure sensor body from being damaged or broken, thereby improving the safety and service life of the strain pressure sensor body.

[0015] 2. The utility model arranges the wiring port, the wire insertion slot, the rubber sleeve movable plate and the spring piece. The length of the upper and lower rubber sleeve movable plates just meets the opening size of the wire insertion slot. As the transmission line occupies a certain space, the rubber sleeve movable plate can no longer be completely rotated to maintain a vertical state. As a result, as the transmission line is pulled, the rubber sleeve movable plate will only be clamped tighter and tighter, thereby effectively preventing the transmission line from loosening and falling off, thereby greatly improving the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the force transmission seat of the utility model;

[0018] Figure 3 This is a schematic diagram of the dismantling structure of the load-bearing plate of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the wiring port of the present invention.

[0020] In the figure: 1. Strain pressure sensor body; 2. Force transmission seat; 3. Sliding groove; 4. Force distribution mechanism; 401. Guide rod; 402. Sliding block; 403. Thrust spring; 404. Movable rod; 405. Four-way shaft seat; 5. Force plate; 6. Wiring port; 601. Wire insertion slot; 602. Rubber sleeve movable plate; 603. Shrapnel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 3 As shown, an anti-fracture intelligent strain pressure sensor includes a strain pressure sensor body 1, a force transmission seat 2 is fixedly installed above the surface of the strain pressure sensor body 1, and the shape of the force transmission seat 2 is set to be a cylinder with a groove in the middle. Four sliding grooves 3 are evenly distributed below the inner surface of the force transmission seat 2, and a force distribution mechanism 4 is arranged inside the sliding groove 3. A force plate 5 is arranged inside the force transmission seat 2 above the force distribution mechanism 4, and a wiring port 6 is provided on the right side of the surface of the strain pressure sensor body 1.

[0023] By adopting the above technical solution, the force-bearing plate 5 contacts the pressure object first, preventing the pressure object from directly contacting the strain pressure sensor body 1, causing wear of the strain pressure sensor body 1 and sudden breakage due to excessive pressure at a single point. After the force distribution mechanism 4 evenly disperses the pressure, the pressure is transmitted to the strain pressure sensor body 1 for measurement through the force transmission seat 2, so that the initial pressure applied to the strain pressure sensor body 1 is a uniformly distributed force, and the pressure applied to the strain pressure sensor body 1 is more linear, thereby improving the measurement accuracy.

[0024] Furthermore, the force distribution mechanism 4 includes a guide rod 401 fixedly mounted on the inner surface of each sliding groove 3 , and a slider 402 is slidably provided on the surface of each guide rod 401 .

[0025] By adopting the above technical solution, the slider 402 can move more stably under the limiting guidance of the guide rod 401, and the slider 402 can evenly distribute the pressure to the surroundings by using the inner wall of the sliding groove 3.

[0026] Furthermore, the force distribution mechanism 4 further includes a thrust spring 403 fixedly provided on one side of the surface of the slider 402 , and one end of the thrust spring 403 is sleeved on the outer periphery of the guide rod 401 and fixedly connected to the inner surface of the sliding groove 3 .

[0027] By adopting the above technical solution, after the thrust spring 403 is squeezed to the extreme, the transmission of the compressive force remains unchanged, which will not affect the transmission effect of the compressive force. On the contrary, after the pressure detection is completed, it can push the entire force distribution mechanism 4 to reset.

[0028] Furthermore, the force distribution mechanism 4 further includes a movable rod 404 rotatably provided on the upper end of the slider 402 , and a four-way shaft seat 405 rotatably provided on the upper end of the movable rod 404 .

[0029] By adopting the above technical solution, the four-way shaft seat 405 is directly moved vertically downward under pressure to transmit the pressure at the center point, and the movable rod 404 can be used to push the slider 402 to move, thereby evenly distributing the lateral force.

[0030] Furthermore, the upper surface of the four-way shaft seat 405 is fixedly connected to the force-bearing plate 5 , and the surface of the force-bearing plate 5 is located around the inner surface of the force transmission seat 2 to slide in contact therewith.

[0031] By adopting the above technical solution, the force-bearing plate 5 is the primary structural component that preferentially contacts the pressure object to transmit pressure, so that the stage of the maximum instantaneous pressure is also on the force-bearing plate 5, that is, the strain pressure sensor body 1 can be protected to avoid wear of the strain pressure sensor body 1. Even if the instantaneous pressure is too large, only the force-bearing plate 5 will be broken, preventing the strain pressure sensor body 1 from breaking and damaging. The replacement cost of the force-bearing plate 5 is extremely low compared to the damage of the entire strain pressure sensor body 1, which can also reduce cost losses.

[0032] like Figure 1 and Figure 4 As shown, the wiring port 6 includes a wire insertion slot 601 fixedly installed on the right side of the surface of the strain pressure sensor body 1, and the upper and lower sides of the right end of the inner surface of the wire insertion slot 601 are rotatably provided with a rubber sleeve movable plate 602, and the upper and lower ends of the rubber sleeve movable plate 602 are both set to an arc length that is exactly half of the wire insertion slot 601. The wiring port 6 also includes a spring piece 603 fixedly provided on the left side of the surface of the rubber sleeve movable plate 602, and the left end of the spring piece 603 is fixedly connected to the inner surface of the wire insertion slot 601 by a bolt.

[0033] By adopting the above technical solution, the transmission line is inserted into the line insertion slot 601 from the outside, which can push the rubber sleeve movable plate 602 to rotate to the left to squeeze the spring piece 603 to bend, thereby normally opening the line insertion slot 601 to connect the transmission line to the strain pressure sensor body 1. After the connection, the bent spring piece 603 uses its own non-plastic elastic force to push the rubber sleeve movable plate 602 to rotate toward the middle to tightly clamp the transmission line;

[0034] When the transmission line is pulled by external force, the transmission line will drive the clamped rubber sleeve movable plate 602 to rotate to the right, but the length of the upper and lower rubber sleeve movable plates 602 just meets the opening size of the wire insertion slot 601. Due to the transmission line occupying a certain space, the rubber sleeve movable plate 602 can no longer be completely rotated to maintain a vertical state. As a result, as the transmission line is pulled, the rubber sleeve movable plate 602 will only be clamped tighter and tighter, thereby effectively preventing the transmission line from loosening and falling off.

[0035] Working principle: When using the anti-fracture intelligent strain pressure sensor, first, connect and assemble the transmission line with the strain pressure sensor body 1. The transmission line is inserted into the wire insertion slot 601 from the outside, which can push the rubber sleeve movable plate 602 to rotate to the left and squeeze the spring piece 603 to bend, thereby opening the wire insertion slot 601 normally to connect the transmission line to the strain pressure sensor body 1. After the connection, the bent spring piece 603 uses its own non-plastic elastic force to push the rubber sleeve movable plate 602 to rotate toward the middle and tightly clamp the transmission line. When the transmission line is pulled by external force, the transmission line will drive the clamped rubber sleeve movable plate 602 to rotate to the right, but the length of the upper and lower rubber sleeve movable plates 602 just meets the opening size of the wire insertion slot 601. Due to the transmission line occupying a certain space, the rubber sleeve movable plate 602 can no longer be completely rotated to maintain a vertical state. As the transmission line is pulled, it will only drive the rubber sleeve movable plate 602 to clamp tighter and tighter, so that the transmission line is stably connected. Then, when using the strain pressure sensor body 1 for pressure detection, the pressure object takes priority. The contact force plate 5 pushes the four-way shaft seat 405 downward, thereby pushing the four movable rods 404 and the slider 402 to move toward the distal end along the guide rod 401 and the sliding groove 3, and squeezing the thrust spring 403. When the slider 402 moves to the distal inner wall of the sliding groove 3 and fits in, the four-way shaft seat 405 also fits in with the bottom of the force transmission seat 2. At this time, the force of the pressure object can be transmitted to the strain pressure sensor body 1 through the force transmission seat 2 to measure the pressure. The force on the strain pressure sensor body 1 is transmitted through the four movable rods 404 and the slider 402 to the distal end. 04 and the four-way axis seat 405 disperse the force, that is, the strain pressure sensor body 1 receives a more uniform and linear compressive force when detecting pressure. The pressure is measured by transmission through the force transmission seat 2, the force distribution mechanism 4 and the force plate 5, avoiding the strain pressure sensor body 1 itself from directly contacting the pressure object. That is, when the pressure is excessive, the force plate 5 is broken by a large impact, which effectively prevents the strain pressure sensor body 1 from directly contacting the pressure object and breaking. This is the working principle of the anti-fracture intelligent strain pressure sensor.

Claims

1. A fracture-resistant intelligent strain pressure sensor, comprising a strain pressure sensor body (1), characterized in that: A force transmission seat (2) is fixedly mounted above the surface of the strain pressure sensor body (1); the shape of the force transmission seat (2) is set to be a barrel-shaped body with a groove in the middle; four sliding grooves (3) are evenly distributed below the inner surface of the force transmission seat (2); a force distribution mechanism (4) is arranged inside the sliding groove (3); a force plate (5) is arranged above the force distribution mechanism (4) and inside the force transmission seat (2); and a wiring port (6) is arranged on the right side of the surface of the strain pressure sensor body (1).

2. The anti-fracture intelligent strain pressure sensor according to claim 1, characterized in that: The force distribution mechanism (4) comprises a guide rod (401) fixedly mounted on the inner surface of each sliding groove (3), and a sliding block (402) is slidably arranged on the surface of each guide rod (401).

3. The anti-fracture intelligent strain pressure sensor according to claim 1, characterized in that: The force distribution mechanism (4) further comprises a thrust spring (403) fixedly arranged on one side of the surface of the slider (402), one end of the thrust spring (403) being sleeved on the periphery of the guide rod (401) and fixedly connected to the inner surface of the sliding groove (3).

4. The anti-fracture intelligent strain pressure sensor according to claim 1, characterized in that: The force distribution mechanism (4) further comprises a movable rod (404) rotatably arranged on the upper end of the slider (402), and a four-way shaft seat (405) is rotatably arranged on the upper end of the movable rod (404).

5. The anti-fracture intelligent strain pressure sensor according to claim 4, characterized in that: The upper surface of the four-way shaft seat (405) is fixedly connected to the force-bearing plate (5), and the surface of the force-bearing plate (5) is located around the inner surface of the force transmission seat (2) to fit and slide.

6. The anti-fracture intelligent strain pressure sensor according to claim 1, characterized in that: The wiring port (6) comprises a wire insertion slot (601) fixedly mounted on the right side of the surface of the strain pressure sensor body (1), and a rubber sleeve movable plate (602) is rotatably arranged on the upper and lower sides of the right end of the inner surface of the wire insertion slot (601), and the upper and lower ends of the rubber sleeve movable plate (602) are arranged in an arc shape with a length exactly half of the wire insertion slot (601).

7. The anti-fracture intelligent strain pressure sensor according to claim 1, characterized in that: The wiring port (6) further comprises a spring sheet (603) fixedly arranged on the left side of the surface of the rubber sleeve movable plate (602), and the left end of the spring sheet (603) is fixedly connected to the inner surface of the wire insertion slot (601) by means of bolts.

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