Pressure displacement detection mechanism
By employing a synchronous detection method combining a ring-shaped mechanical sensor and a coaxial displacement sensor in the cutter testing equipment, along with a flexible adjustment mechanism, the problems of insufficient accuracy and poor adaptability of traditional testing equipment are solved, achieving high-precision, multi-parameter cutter performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional testing equipment is unable to meet the requirements of high-precision, multi-parameter, and flexible testing. It cannot simultaneously acquire the piston rod push-out force and real-time displacement data after the cutter is detonated. Furthermore, its fixed mechanical structure makes it difficult to adapt to the testing requirements of different models of cutters, resulting in deviations in test results and poor adaptability.
A pressure displacement detection mechanism was designed, which uses a ring-shaped mechanical sensor and a coaxial displacement sensor to collect data synchronously. Combined with a flexible adjustment mechanism and a limit cylinder, it realizes the synchronous detection of piston rod top force and real-time displacement. The flexibility and accuracy of the detection module are improved by using a limit slide rail and a guide sleeve.
It achieves high-precision, multi-parameter synchronous detection of cutter performance, adapts to the testing needs of different models of cutters, improves the accuracy and versatility of testing, and reduces the deviation of test data and the risk of equipment damage.
Smart Images
Figure CN224066169U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection device technology, and in particular to a pressure displacement detection mechanism. Background Technology
[0002] In the field of cutter testing, traditional testing equipment struggles to meet the demands for high-precision, multi-parameter, and flexible testing. Currently, most testing devices employ a single pressure sensor or displacement sensor, failing to simultaneously acquire the piston rod ejection force and real-time displacement data after the cutter ignites, leading to deviations in the test results. For instance, some devices rely solely on spring-type pressure sensors for pressure detection; the small contact area and uneven force distribution result in distorted ejection force data. Displacement detection, often employing contact sensors, is susceptible to frictional interference during high-speed piston rod ejection, affecting measurement accuracy.
[0003] Furthermore, existing testing equipment has a fixed mechanical structure, making it difficult to adapt to the testing requirements of different types of cutters. The position and resistance of the testing station cannot be flexibly adjusted, failing to simulate diverse working conditions and resulting in a lack of universality in the test results. Simultaneously, the unreasonable sensor installation layout, with mechanical and displacement sensors being off-axis and acquiring data asynchronously, further reduces data accuracy and reliability. As cutters are increasingly widely used in military, automotive safety, and other fields, the demand for accurate testing of their dynamic performance is urgent. There is a pressing need for an integrated, flexible testing mechanism to address the problems of incomplete parameter acquisition, insufficient accuracy, and poor adaptability of traditional equipment. Summary of the Invention
[0004] The main purpose of this utility model is to provide a pressure displacement detection mechanism, which aims to achieve high-precision, multi-parameter synchronous detection and flexible adaptation of the cutter performance by optimizing the structural design and detection method.
[0005] To achieve the above objectives, the pressure displacement detection mechanism proposed in this utility model includes:
[0006] A base fixture, wherein a positioning groove is provided on the base fixture, and a cutter to be tested is fixed in the positioning groove;
[0007] The detection module is provided on both sides of the piston rod extension direction of the cutter, and each detection module includes:
[0008] A mechanical sensor, which is annularly sleeved around the outer periphery of the piston rod, is used to collect the thrust force of the piston rod after detonation.
[0009] A displacement sensor is coaxially arranged with the axis of the piston rod and is used for non-contact detection of the real-time displacement of the piston rod.
[0010] A flexible adjustment mechanism, comprising a limiting cylinder and a limiting slide rail;
[0011] The output end of the limiting cylinder is fixedly connected to the detection module and is used to push the detection module to move axially along the piston rod. The limiting slide rail is set parallel to the piston rod axis and is used for the detection module to be slidably mounted on the limiting slide rail by a slider.
[0012] In some embodiments of this utility model, the diameter of the central hole of the annular mechanical sensor matches the outer diameter of the piston rod, and the end face of the sensor is in complete contact with the end face of the piston rod.
[0013] In some embodiments of this utility model, the displacement sensor is a laser displacement sensor or a magnetic grating displacement sensor, and the distance between the detection probe of the displacement sensor and the end of the piston rod can be adjusted by a limiting cylinder.
[0014] In some embodiments of this utility model, an elastic connecting member is provided between the limiting cylinder and the detection module.
[0015] In some embodiments of this utility model, the base fixture includes a detachable elastic pressure plate, which is engaged with a positioning groove by bolts.
[0016] In some embodiments of this utility model, the two ends of the limiting slide rail are provided with limiting blocks.
[0017] In some embodiments of this utility model, a guide sleeve is provided between the detection modules on both sides and the cutter, and the inner wall of the guide sleeve is provided with a lubricating coating.
[0018] In some embodiments of this utility model, the cylinder body of the limiting cylinder is provided with a scale.
[0019] In some embodiments of this invention, the mounting planes of the mechanical sensor and the displacement sensor are located on the same horizontal plane to ensure synchronous acquisition of the axial parameters of the piston rod.
[0020] This utility model's technical solution uses a positioning groove in the base fixture to fix the cutter, ensuring the cutter's position is stable during testing and avoiding data deviation due to shaking. Detection modules are symmetrically arranged on both sides of the piston rod. Each module includes a mechanical sensor annularly sleeved around the piston rod and a displacement sensor coaxially aligned with the piston rod axis. This enables synchronous acquisition of the piston rod's thrust force and real-time displacement after detonation, providing a more comprehensive and accurate reflection of the cutter's performance compared to traditional single-parameter detection methods. The output end of the limit cylinder of the flexible adjustment mechanism is fixedly connected to the detection module, allowing it to move axially along the limit slide rail. For example, for cutters with different stroke lengths, the limit cylinder adjusts the detection module's position to place the sensor in the optimal detection position. The design of the limit slide rail and slider ensures smooth and precise movement of the detection module, effectively improving the adaptability of the testing mechanism to different cutter models and overcoming the poor versatility of traditional fixed-structure testing equipment. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the pressure displacement detection mechanism of this utility model.
[0023] Explanation of icon numbers:
[0024] 100. Base fixture; 200. Cutter; 300. Detection module; 400. Mechanical sensor; 500. Displacement sensor; 600. Flexible adjustment mechanism; 610. Limit cylinder; 621. Limit stop; 700. Elastic connector;
[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed by this utility model.
[0029] See appendix Figure 1 This utility model proposes a pressure displacement detection mechanism, comprising:
[0030] The base fixture 100 is provided with a positioning groove, and the cutter to be tested 200 is fixed in the positioning groove;
[0031] Detection modules 300 are provided on both sides of the piston rod extension direction of the cutter 200. Each detection module 300 includes:
[0032] The mechanical sensor 400 is annularly sleeved around the piston rod and is used to collect the thrust force of the piston rod after detonation.
[0033] Displacement sensor 500 is coaxially arranged with the axis of the piston rod and is used for non-contact detection of the real-time displacement of the piston rod.
[0034] The flexible adjustment mechanism 600 includes a limit cylinder 610 and a limit slide rail.
[0035] The output end of the limiting cylinder 610 is fixedly connected to the detection module 300 and is used to push the detection module 300 to move axially along the piston rod. The limiting slide rail is set parallel to the piston rod axis and is used for the detection module 300 to be slidably mounted on the limiting slide rail by a slider.
[0036] Based on the above technical features, the base fixture 100 is provided with a positioning groove to fix the cutter 200, ensuring the stability of the cutter 200's position during the testing process and avoiding deviations in the test data due to shaking. Detection modules 300 are symmetrically arranged on both sides of the piston rod. Each detection module 300 includes a force sensor 400 annularly sleeved around the piston rod and a displacement sensor 500 coaxially arranged with the piston rod axis. This enables synchronous acquisition of the piston rod's push-out force and real-time displacement after detonation, providing a more comprehensive and accurate reflection of the cutter 200's performance compared to traditional single-parameter detection methods. The output end of the limit cylinder 610 of the flexible adjustment mechanism 600 is fixedly connected to the detection module 300, allowing the detection module 300 to move axially along the limit slide rail. For example, for cutters 200 with different stroke lengths, the position of the detection module 300 is adjusted by the limit cylinder 610 to make the sensor in the optimal detection position; the design of the limit slide rail and the slider ensures that the detection module 300 moves smoothly and accurately, effectively improving the adaptability of the detection mechanism to different models of cutters 200 and overcoming the problem of poor versatility of traditional fixed structure detection equipment.
[0037] In this design, the diameter of the central hole of the annular force sensor 400 matches the outer diameter of the piston rod, and the sensor end face is in complete contact with the piston rod end face. In actual testing, this design ensures uniform force distribution on the piston rod end face, enabling more accurate acquisition of ejection force data compared to traditional point contact or small-area contact pressure sensors.
[0038] Furthermore, the displacement sensor 500 is either a laser displacement sensor 500 or a magnetic grating displacement sensor 500. The distance between the detection probe of the displacement sensor 500 and the end of the piston rod can be adjusted by the limiting cylinder 610. The non-contact detection method avoids the interference caused by friction and wear on the piston rod movement of traditional contact sensors, ensuring that the displacement data is true and reliable. At the same time, the distance can be flexibly adjusted by the limiting cylinder 610 to adapt to the detection needs of piston rods of cutters 200 with different sizes and ejection speeds, further enhancing the versatility of the detection mechanism.
[0039] In this embodiment, an elastic connector 700 is provided between the limiting cylinder 610 and the detection module 300. When the cutter 200 detonates, the piston rod ejects at high speed, generating a large impact force. The elastic connector 700 can effectively buffer this impact force, reducing damage to the detection module 300 and the sensor, and extending the service life of the detection mechanism. At the same time, the buffering effect helps to maintain the stability of the detection module 300 position, ensuring that the sensor continuously and accurately collects data and improving the reliability of the detection results.
[0040] Specifically, the base fixture 100 includes a detachable elastic pressure plate, which engages with a positioning groove via bolts. The detachable elastic pressure plate of the base fixture 100, through bolt engagement with the positioning groove, forms a clamping and fixing mechanism for the cutter 200. In actual operation, for cutters 200 of different dimensions, quick and stable clamping can be achieved by replacing the elastic pressure plate with one of different specifications or adjusting the bolt tightening. This improves testing efficiency, ensures a secure fixation, and prevents testing accuracy from being affected by loosening of the cutter 200.
[0041] Furthermore, limit blocks 621 are provided at both ends of the limit slide rail. During the testing process, when the limit cylinder 610 pushes the testing module 300 to move, the limit blocks 621 can prevent the testing module 300 from moving out of the normal testing range due to excessive movement, thus avoiding equipment damage. At the same time, it ensures that the testing module 300 can work within the preset reasonable range during each test, ensuring the consistency and comparability of the test data.
[0042] Preferably, a guide sleeve is provided between the detection modules 300 on both sides and the cutter 200, and the inner wall of the guide sleeve is provided with a lubricating coating; during the piston rod ejection process, the guide sleeve provides precise guidance for the piston rod, ensuring its linear movement along the axial direction; the lubricating coating effectively reduces the frictional resistance between the piston rod and the guide sleeve, reduces the influence of friction on the piston rod's movement state, thereby enabling the displacement sensor 500 to detect the real-time displacement of the piston rod more accurately, further improving the detection accuracy.
[0043] In this embodiment, the cylinder body of the limiting cylinder 610 is equipped with a scale; the operator can intuitively read the initial position of the detection module 300. When adjusting the position of the detection module 300 to adapt to different cutters 200, the scale provides a quantitative reference for position adjustment, eliminating the need for additional measuring tools, making the adjustment process more convenient and efficient, and ensuring the accuracy of position adjustment, thus facilitating the rapid completion of detection preparation work.
[0044] The mechanical sensor 400 and the displacement sensor 500 are mounted on the same horizontal plane to ensure synchronous acquisition of the piston rod's axial parameters. This ensures that both sensors acquire the piston rod's axial parameters synchronously. During data acquisition, this avoids time differences and data deviations caused by inconsistent sensor mounting planes, allowing for precise correspondence between the ejection force and displacement data. This provides a high-quality data foundation for subsequent analysis of the cutter 200's dynamic performance and helps to more accurately evaluate the cutter 200's performance.
[0045] Through the synergistic effect of the above-mentioned mechanisms, this pressure displacement detection mechanism achieves high-precision, multi-parameter synchronous detection of the cut-off device 200 performance and flexible adaptation to test conditions, effectively solving the problems existing in traditional testing equipment, and has significant technical advantages and practical value.
[0046] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A pressure displacement detecting mechanism characterized by comprising: The utility model relates to a cutting tester, which comprises: a base tooling provided with a positioning groove, wherein the positioning groove is fixed with a cutting tester to be tested; a detection module, wherein two sides of a piston rod of the cutting tester are respectively provided with the detection module, each side detection module comprises a mechanical sensor and a displacement sensor, the mechanical sensor is annularly sleeved on an outer periphery of the piston rod, and the displacement sensor is coaxially arranged with an axis of the piston rod; a flexible adjusting mechanism, which comprises a limiting air cylinder and a limiting slide rail; wherein the output end of the limiting air cylinder is fixedly connected with the detection module, and the limiting air cylinder is used for pushing the detection module to move along an axial direction of the piston rod, the limiting slide rail is parallel to the axis of the piston rod, and the detection module is slidably installed on the limiting slide rail through a sliding block.
2. The pressure displacement detecting mechanism according to claim 1, wherein A central hole diameter of the annular mechanical sensor matches an outer diameter of the piston rod, and an end surface of the sensor is completely attached to an end surface of the piston rod.
3. The pressure displacement detecting mechanism according to claim 1, wherein The displacement sensor is a laser displacement sensor or a magnetic grating displacement sensor, and a detection probe of the displacement sensor can be adjusted in distance from an end portion of the piston rod through the limiting air cylinder.
4. The pressure displacement detecting mechanism according to claim 1, wherein An elastic connecting piece is arranged between the limiting air cylinder and the detection module.
5. The pressure displacement detecting mechanism according to claim 1, wherein The base tooling comprises a detachable elastic pressing plate, and the elastic pressing plate is matched with the positioning groove through a bolt.
6. The pressure displacement detecting mechanism according to claim 1, wherein Both ends of the limiting slide rail are provided with limiting stoppers.
7. The pressure displacement detecting mechanism according to claim 1, wherein Both sides of the detection module and the cutting tester are provided with a guide sleeve, and an inner wall of the guide sleeve is provided with a lubricating coating.
8. The pressure displacement detection mechanism of claim 1, wherein A scale is arranged on a cylinder body of the limiting air cylinder.
9. The pressure displacement detecting mechanism of claim 1, wherein Mounting planes of the mechanical sensor and the displacement sensor are located on the same horizontal plane.