Structural vibration measuring device

Abstract

The utility model provides a structural vibration measuring device, which is characterized in that a cavity is arranged in a protective shell, a connecting installation assembly comprises an installation buckle, an elastic washer, an elastic check ring and a connecting button, the installation buckle is inserted in a first round hole, a through hole is arranged in the installation buckle, and the elastic washer is arranged in the through hole. The elastic washer is arranged between the installation buckle and the end wall of one end of the cavity, the elastic check ring is arranged on the side wall of the installation buckle, the connecting button is arranged in the through hole in a penetrating mode, installation grooves are formed in the two end faces of the connecting button, the vibration sensor is installed on one installation groove of the connecting button, and the sensing probe is installed on the other installation groove of the connecting button. The adjusting and limiting assembly comprises a fixing cover plate, a plurality of fixing nuts, a limiting shaft and an adjusting shaft, and the elastic piece is arranged in the cavity. According to the utility model, the vibration sensor can be relatively independently positioned in the cavity, so that the problem that the vibration test result of an engine is influenced when the vibration sensor is contacted with other mounting parts is solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine testing, specifically to a structural vibration measurement device. Background Technology

[0002] The rapid rise of the automotive industry has led to the standardization and specialization of various automotive parts. In the automotive industry and even the entire power machinery sector, the engine, as a core component, directly determines a product's competitiveness and market position. Therefore, engine testing is not only a necessary step in product design and development but also a crucial means of driving technological innovation and improving product quality.

[0003] Engine testing is the process of testing and evaluating various performance parameters of an engine. This testing is typically conducted during the engine's research and development, production, and maintenance phases to ensure that the engine's performance meets design requirements and can operate reliably under various operating conditions. Engine testing can be categorized into several types, including performance testing, durability testing, environmental adaptability testing, reliability testing, and vibration and noise testing, with the specific test content and methods depending on the engine type and application.

[0004] In existing technologies, engine vibration testing typically simulates the vibration environment of the engine during transportation or use, and then collects vibration data using vibration sensors. However, during conventional vibration testing or direct measurement using vibration sensors, the sensors come into contact with objects outside the engine, such as parts used to fix the sensors. This contact can affect the engine's vibration characteristics, leading to too many sources of signal interference, hindering vibration signal acquisition, and causing signal instability. Consequently, the measured waveform is often unstable, and the amplitude cannot be quickly adjusted to obtain the relevant curve. Furthermore, existing vibration sensors are not convenient for fixed installation. Therefore, current technologies for engine vibration testing have certain limitations. Utility Model Content

[0005] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a structural vibration measurement device.

[0006] This utility model provides a structural vibration measuring device, characterized by: a protective shell having a cylindrical cavity arranged along the axial direction inside, the cavity wall having internal threads, and circular holes at both ends of the protective shell that can communicate with the cavity; the diameter of a first circular hole at one end of the protective shell is smaller than the diameter of the cavity, and the diameter of a second circular hole at the other end is not smaller than the diameter of the cavity.

[0007] The connection mounting assembly includes a mounting clip, an elastic washer, an elastic retaining ring, and a connecting button. The mounting clip is inserted into a first circular hole. A through hole is formed inside the mounting clip along its axis, with two openings located on the two end faces of the mounting clip. The elastic washer is positioned between the mounting clip and one end wall of the cavity. The elastic retaining ring is located on the side wall of the mounting clip, outside the protective shell. The connecting button passes through the through hole and has a limiting section and a through section. The limiting section is located inside the cavity and has an annular protrusion with a diameter larger than the diameter of the through hole. Part of the through section is located inside the through hole, and another part extends through the through hole to the outside of the protective shell. The through section is smaller than the through hole. Mounting grooves are formed on the end faces of both the limiting section and the through section.

[0008] The vibration sensor is mounted on the connection button via the first mounting slot on the end face of the limiting section.

[0009] The sensor probe is mounted on the connection button via the second mounting slot on the end face of the through-section.

[0010] The adjusting and limiting assembly includes a fixed cover plate, multiple fixing nuts, a limiting shaft, and an adjusting shaft. The fixed cover plate is annular and is secured to the other end of the protective shell by the multiple fixing nuts. The limiting shaft is clamped onto the fixed cover plate and has mounting holes inside it along its axis. The adjusting shaft is T-shaped and has a horizontal part and a vertical part. The horizontal part is located inside a cavity, and its shaft wall fits against the cavity wall. The shaft wall of the horizontal part has external threads that can engage with internal threads. The diameter of the horizontal part is larger than the diameter of the mounting hole but smaller than the end face diameter of the limiting shaft. The vertical part is located inside the mounting hole, and its diameter is smaller than the diameter of the mounting hole. The vertical part has adjusting holes arranged along its axis.

[0011] An elastic element is disposed in the cavity. One end of the elastic element abuts against the limiting part of the connecting button, and the other end is fixed on the horizontal part of the adjusting shaft. The length of the elastic element is greater than the distance between the other end face of the limiting part and the end face of one end of the horizontal part.

[0012] The structural vibration measuring device provided by this utility model also has the following features: the mounting buckle is T-shaped, with a horizontal section and a vertical section. The horizontal section is located inside the cavity, and the side wall of the horizontal section is in contact with the inner wall of the cavity. The diameter of the horizontal section is not less than the diameter of the limiting part. An annular groove is provided on the bottom wall of the horizontal section. The inner diameter of the annular groove is larger than the diameter of the vertical section. An elastic washer is provided between the bottom wall of the horizontal section and the inner end wall of one end of the cavity. An annular protrusion that can engage with the annular groove is provided on the outer wall of the horizontal section facing the elastic washer. The vertical section is inserted into the first circular hole. An annular groove is provided on the side wall of the vertical section outside the first circular hole. An elastic retaining ring is provided in the annular groove. The elastic retaining ring is in contact with the outer end wall of one end of the protective shell.

[0013] The structural vibration measuring device provided by this utility model also has the following feature: the elastic retaining ring is a shaft elastic retaining ring.

[0014] The structural vibration measuring device provided by this utility model also has the following feature: the vibration sensor is located inside the elastic element.

[0015] The structural vibration measuring device provided by this utility model also has the following features: a slot is provided on the other end face of the fixed cover plate and inside it, and a protrusion is provided on the shaft wall of the limiting shaft that can engage with the slot.

[0016] The structural vibration measuring device provided by this utility model also has the following feature: the inner wall of the adjusting hole can be provided with a thread for driving the adjusting shaft to rotate.

[0017] The structural vibration measuring device provided by this utility model also has the following feature: the elastic element is a spring.

[0018] Functions and effects of utility models

[0019] According to the structural vibration measuring device involved in this utility model, when the engine vibration test is performed, after the sensing probe comes into contact with the engine, it will cause the connecting button to squeeze the elastic element, causing the elastic element to contract under pressure in the cavity. As a result, the connecting button will disengage from the mounting clip, and the vibration sensor mounted on the connecting button can be located relatively independently in the cavity. Therefore, the problem that the vibration sensor will affect the engine vibration test results when it comes into contact with other mounting parts is solved.

[0020] In summary, when using this invention for vibration testing, the vibration sensor can be relatively independent of the engine, which facilitates the acquisition of vibration signals and thus ensures the accuracy of the vibration test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a structural vibration measuring device according to the present invention;

[0022] Figure 2 This is a front view of a structural vibration measuring device according to this utility model;

[0023] Figure 3 This is a half-sectional view of a structural vibration measuring device according to this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Protective shell; 11. Cavity; 12. First round hole; 13. Second round hole; 20. Connecting and mounting assembly; 21. Mounting buckle; 211. Through hole; 212. Horizontal section; 2121. Annular groove; 213. Vertical section; 2131. Annular groove; 22. Elastic washer; 221. Annular protrusion; 23. Elastic retaining ring; 24. Connecting button; 241. Limiting section; 2411. Limiting part; 2412. First mounting groove; 242. Through section; 2421. Second mounting groove; 30. Vibration sensor; 40. Sensor probe; 50. Adjusting and limiting assembly; 51. Fixed cover plate; 511. Slot; 52. Fixed nut; 53. Limiting shaft; 531. Mounting hole; 532. Protrusion; 54. Adjusting shaft; 541. Horizontal part; 542. Vertical part; 5421. Adjusting hole; 60. Elastic element. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0027] Example

[0028] Figure 1 This is a structural schematic diagram of the present invention. Figure 2 This is a front view of the present invention. Figure 3 This is a half-sectional view of the present invention.

[0029] like Figures 1 to 3 As shown, this embodiment provides a structural vibration measurement device, including: a protective shell 10, a connecting and mounting assembly 20, a vibration sensor 30, a sensing probe 40, an adjustment and limiting assembly 50, and an elastic element 60.

[0030] like Figures 1 to 3 As shown, the protective shell 10 has a cylindrical cavity 11 arranged along the axial direction inside. The cavity wall of the cavity 11 is provided with internal threads. Both ends of the protective shell 10 are provided with circular holes that can communicate with the cavity 11. The diameter of the first circular hole 12 at one end of the protective shell 10 is smaller than the diameter of the cavity 11, and the diameter of the second circular hole 13 at the other end is not smaller than the diameter of the cavity 11.

[0031] The protective shell 10 can be mounted on a movable bracket, allowing for easy contact between the device and the engine during vibration testing. This movable bracket is a mature and common linear motion mechanism found in the prior art, such as a ball screw linear motion mechanism, a sliding guide linear motion mechanism, or a motor-driven linear motion mechanism. In this embodiment, the movable bracket is preferably a sliding guide linear motion mechanism.

[0032] like Figures 1 to 3As shown, the connecting mounting assembly 20 includes a mounting clip 21, an elastic washer 22, an elastic retaining ring 23, and a connecting button 24. The mounting clip 21 is inserted into the first circular hole 12. A through hole 211 is formed inside the mounting clip 21 along its axial direction, with two openings located on the two end faces of the mounting clip 21. The elastic washer 22 is disposed between the mounting clip 21 and one end wall of the cavity 11. The elastic retaining ring 23 is disposed on the side wall of the mounting clip 21 and located outside the protective shell 10. The connecting button 24 passes through the through hole 211 and has a limiting section 241 and a through section 242. The limiting section 241 is located inside the cavity 11 and has a limiting portion 2411 with an annular protrusion 221. The diameter of the limiting portion 2411 is larger than the diameter of the through hole 211. One part of the through section 242 is located inside the through hole 211, and the other part of the through section 242 extends through the through hole 211 to the outside of the protective shell 10. The size of the through section 242 is smaller than the size of the through hole 211. Mounting grooves are provided on the end faces of both the limiting section 241 and the through section 242.

[0033] In this embodiment, the mounting buckle 21 is T-shaped, having a horizontal section 212 and a vertical section 213. The horizontal section 212 is located inside the cavity 11, and its sidewall fits against the inner wall of the cavity 11. The diameter of the horizontal section 212 is not less than the diameter of the limiting part 2411. An annular groove 2121 is formed on the bottom wall of the horizontal section 212, and the inner diameter of the annular groove 2121 is larger than the diameter of the vertical section 213. An elastic washer 22 is disposed between the bottom wall of the horizontal section 212 and the inner end wall of one end of the cavity 11. The elastic washer 22 has an annular protrusion 221 on the outer wall of the horizontal section 212 that can engage with the annular groove 2121. The vertical segment 213 is inserted into the first circular hole 12. An annular groove 2131 is formed on the side wall of the vertical segment 213 outside the first circular hole 12. An elastic retaining ring 23 is disposed in the annular groove 2131 and fits against the outer end wall of the upper end of the protective shell 10. The horizontal segment 212 and the vertical segment 213 of the mounting buckle 21 are divided by the horizontal and vertical of a T-shape, not by the horizontal and vertical division of the mounting buckle 21 arrangement direction in the attached drawings.

[0034] In this embodiment, the elastic retaining ring 23 is a shaft elastic retaining ring.

[0035] In this embodiment, the elastic washer 22 is an elastic washer made of rubber.

[0036] like Figures 1 to 3 As shown, the vibration sensor 30 is mounted on the connection button 24 through the first mounting groove 2412 on the end face of the limiting section 241.

[0037] In this embodiment, the vibration sensor 30 is located inside the elastic member 60.

[0038] like Figures 1 to 3As shown, the sensor probe 40 is mounted on the connection button 24 through the second mounting groove 2421 on the end face of the through section 242.

[0039] like Figures 1 to 3 As shown, the adjusting and limiting assembly 50 includes a fixed cover plate 51, multiple fixing nuts 52, a limiting shaft 53, and an adjusting shaft 54. The fixed cover plate 51 is annular and is mounted on the other end of the protective shell 10 by multiple fixing nuts 52. The limiting shaft 53 is engaged with the fixed cover plate 51, and a mounting hole 531 is provided inside the limiting shaft 53 along its axial direction. The adjusting shaft 54 ​​is T-shaped and has a horizontal part 541 and a vertical part 542. The horizontal part 541 is located inside the cavity 11, and its shaft wall fits against the cavity wall of the cavity 11. The shaft wall of the horizontal part 541 is provided with an external thread that can engage with the internal thread. The diameter of the horizontal part 541 is larger than the diameter of the mounting hole 531 and smaller than the end face diameter of the limiting shaft 53. The vertical part 542 is located inside the mounting hole 531, and its diameter is smaller than the diameter of the mounting hole 531. An adjusting hole 5421 arranged along its axial direction is provided on the vertical part 542. The horizontal portion 541 and the vertical portion 542 of the adjusting shaft 54 ​​are divided by a T-shape, not by the horizontal and vertical division of the arrangement direction of the adjusting shaft 54 ​​in the accompanying drawings.

[0040] In this embodiment, a slot 511 is provided on the other end face of the fixed cover plate 51 and extends into it, and a protrusion 532 is provided on the shaft wall of the limiting shaft 53 that can engage with the slot 511.

[0041] In this embodiment, the inner wall of the adjusting hole 5421 may be provided with a thread for driving the adjusting shaft 54 ​​to rotate.

[0042] like Figures 1 to 3 As shown, the elastic element 60 is disposed in the cavity 11. One end of the elastic element 60 abuts against the limiting part 2411 of the connecting button 24, and the other end is fixed on the horizontal part 541 of the adjusting shaft 54. The length of the elastic element 60 is greater than the distance between the other end face of the limiting part 2411 and the end face of one end of the horizontal part 541.

[0043] In this embodiment, the elastic element 60 is preferably a spring.

[0044] When the engine vibration test is not performed using this utility model, because the length of the elastic member 60 is greater than the distance between the other end face of the limiting part 2411 and the end face of the transverse section 212, that is, the elastic member 60 is in a compressed state in the cavity 11, the elastic member 60 can make the connecting button 24 abut against the mounting buckle 21 through the limiting part 2411 on it. Meanwhile, because the cavity wall of the cavity 11 is provided with internal threads, and the other end of the elastic element 60 is provided with an adjusting shaft 54, the horizontal part 541 of the adjusting shaft 54 ​​is provided with external threads that can mesh with the internal threads, and the adjusting shaft 54 ​​is provided with an adjusting hole 5421 with threads on the hole wall, the adjusting shaft 54 ​​can be rotated by using a tool, thereby moving the adjusting shaft 54 ​​towards one end of the protective shell 10 in the cavity 11 through the meshing internal and external threads, and further squeezing the elastic element 60 to make it contract. Therefore, when conducting engine vibration tests, the pressure strength between the sensing probe 40 and the engine can be adjusted, and the sensing probe 40 can be ensured to fit tightly against the engine surface to avoid loosening.

[0045] Before using this invention to conduct engine vibration testing, the degree of contraction of the elastic element 60 can be adjusted by rotating the adjusting shaft 54. Then, the movable bracket allows the invention to press against the engine, meaning the sensor probe 40 presses against the engine. At this point, the movement distance of the invention can be adjusted to ensure the sensor probe 40 is tightly fitted to the engine surface, preventing loosening and ensuring the accuracy of the vibration test results. Next, as the sensor probe 40 moves into the cavity 11 under pressure, it drives the connecting button 24 to move to the other end of the protective shell 10. This causes the limiting part 2411 on the connecting button 24 to disengage from the other end face of the mounting clip 21, allowing the vibration sensor 30 to be relatively independently located inside the cavity 11. Finally, the engine vibration test can be performed. Because the vibration sensor 30 is relatively independent within the cavity 11, the influence of other parts on the engine vibration test is reduced. Therefore, using this invention provides anti-aliasing filtering, preventing high-frequency noise from interfering with low-frequency signals, further ensuring the accuracy of the engine vibration test results.

[0046] The role and effect of the embodiments

[0047] According to the structural vibration measuring device involved in this utility model, when the engine vibration test is performed, after the sensing probe comes into contact with the engine, it will cause the connecting button to squeeze the elastic element, causing the elastic element to contract under pressure in the cavity. As a result, the connecting button will disengage from the mounting clip, and the vibration sensor mounted on the connecting button can be located relatively independently in the cavity. Therefore, the problem that the vibration sensor will affect the engine vibration test results when it comes into contact with other mounting parts is solved.

[0048] In summary, when using this invention for vibration testing, the vibration sensor can be relatively independent of the engine, which facilitates the acquisition of vibration signals and thus ensures the accuracy of the vibration test results.

[0049] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

Claims

1. A structure vibration measuring device characterized by comprising: It comprises: a protective shell, the inside of which has a cavity arranged along the axial direction and in a cylindrical shape, the cavity wall of which is provided with internal threads, both ends of the protective shell are provided with round holes that can communicate with the cavity, the diameter of the first round hole at one end of the protective shell is smaller than the diameter of the cavity, and the diameter of the second round hole at the other end is not smaller than the diameter of the cavity, a connecting mounting assembly, which comprises a mounting buckle, an elastic washer, an elastic stop ring, and a connecting button, the mounting buckle is inserted into the first round hole, a through hole is formed in the inside of the mounting buckle along the axial direction thereof, both hole openings of the through hole are located on the end faces of the two ends of the mounting buckle, the elastic washer is arranged between the mounting buckle and the end wall of the cavity, the elastic stop ring is arranged on the side wall of the mounting buckle and located outside the protective shell, the connecting button is inserted into the through hole, the connecting button has a limiting section and a penetrating section, the limiting section is located inside the cavity, the limiting section has a limiting part in the form of an annular protrusion, the diameter of the limiting part is greater than the diameter of the through hole, a part of the penetrating section is located in the through hole, and the other part of the penetrating section extends to the outside of the protective shell through the through hole, the size of the penetrating section is smaller than the size of the through hole, mounting grooves are formed on the end faces of the limiting section and the penetrating section, a vibration sensor is mounted on the connecting button through the first mounting groove on the end face of the limiting section, a sensing probe is mounted on the connecting button through the second mounting groove on the end face of the penetrating section, an adjusting limiting assembly, which comprises a fixed cover plate, a plurality of fixed nuts, a limiting shaft, and an adjusting shaft, the fixed cover plate is in the form of a ring and is arranged on the other end of the protective shell through the plurality of fixed nuts, the limiting shaft is clamped on the fixed cover plate, an installation hole is formed in the inside of the limiting shaft along the axial direction thereof, the adjusting shaft is in the form of a T shape and has a horizontal part and a vertical part, the horizontal part is located inside the cavity, the shaft wall thereof is fitted with the cavity wall, the shaft wall of the horizontal part is provided with external threads that can engage with the internal threads, the diameter of the horizontal part is greater than the diameter of the installation hole and smaller than the diameter of the end face of the limiting shaft, the vertical part is located in the installation hole and has a diameter smaller than the diameter of the installation hole, and an adjusting hole is formed in the vertical part along the axial direction thereof, an elastic member is arranged inside the cavity, one end of the elastic member abuts against the limiting part of the connecting button, the other end of the elastic member is fixed on the horizontal part of the adjusting shaft, and the length of the elastic member is greater than the distance between the other end face of the limiting part and the one end face of the horizontal part.

2. The structural vibration measuring device according to claim 1, characterized in that: wherein The mounting buckle is in T-shaped shaft shape, has a horizontal section and a vertical section, the horizontal section is located inside the cavity, the side wall of the horizontal section is attached to the inner wall of the cavity, the diameter of the horizontal section is not less than the diameter of the limiting part, an annular groove is formed in the bottom wall of the horizontal section, the inner diameter of the annular groove is greater than the diameter of the vertical section, the elastic washer is arranged between the bottom wall of the horizontal section and the inner end wall of one end of the cavity, an annular protrusion which can be engaged with the annular groove is arranged on the outer wall of the horizontal section, the vertical section is inserted into the first circular hole, an annular groove is formed in the side wall of the vertical section which is located outside the first circular hole, the elastic washer is arranged in the annular groove, and the elastic washer is attached to the outer end wall of one end of the protective shell.

3. The structural vibration measuring device according to claim 1, wherein: wherein, The elastic washer is an elastic washer for shaft.

4. The structural vibration measuring device according to claim 1, wherein: wherein The vibration sensor is located inside the elastic member.

5. The structural vibration measuring device according to claim 1, wherein: wherein An engaging groove is formed in the other end surface of the fixed cover plate and towards the inside thereof, and a protrusion which can be engaged with the engaging groove is arranged on the shaft wall of the limiting shaft.

6. The structural vibration measuring device according to claim 1, wherein: wherein The inner wall of the adjusting hole can be provided with threads for driving the rotation of the adjusting shaft.

7. The structural vibration measuring device according to claim 1, wherein: wherein The elastic member is a spring.

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