Tool device for assembling sensitive part of piezoelectric vibration sensor

Abstract

The invention discloses a tool device for assembling a sensitive part of a piezoelectric vibration sensor, and belongs to the technical field of vibration sensor assembly.The tool device comprises a base, a wrench head and a shaft sleeve, the shaft sleeve is arranged to guarantee the inner circle coaxiality of a scattered part set in the sensitive part of a compression type vibration sensor, and the insulation performance is guaranteed; the assembly qualification rate is improved; by arranging the positioning block, the coaxiality of the excircles of scattered part sets in the sensitive part of the compression type vibration sensor is ensured, and the product rigidity is ensured; the wrench head applies pre-tightening torque to a plurality of parts, the scattered parts are effectively integrated into an integrated structure with good pre-tightening rigidity, meanwhile, the consistency of product assembly stress can be ensured, the precision and consistency of each assembly are ensured, and the overall performance of a sensitive part of a sensor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vibration sensor assembly, and in particular to a tooling device for assembling sensitive parts of a piezoelectric vibration sensor. Background Art

[0002] Piezoelectric vibration sensors can assist the system in realizing functions such as abnormal vibration alarm and structural life prediction, and are important sensing components of health management and fault diagnosis systems. In recent years, the application demand for piezoelectric vibration sensors has become increasingly extensive, and their application areas are in aviation, aerospace, automobiles, ships, rail transit, nuclear power, wind power, construction, disaster prevention, etc. Piezoelectric vibration sensors use the positive piezoelectric effect of piezoelectric elements to convert vibration acceleration signals into electrical signals that are easy to collect and analyze. The compression structure is one of the commonly used structures of piezoelectric vibration sensors, and it has the remarkable feature of measuring high temperature environments. Products based on this structural form need to rely on assembly devices to rigidly integrate independent and scattered parts together during the manufacturing process to achieve the functional performance of the product, ensure the consistency of assembly, improve assembly efficiency, and ensure product quality. Summary of the invention

[0003] In response to the above problems, the present invention provides a tooling device for assembling the sensitive parts of a piezoelectric vibration sensor, which is used to ensure the coaxiality of the outer cavity and inner cavity of the sensitive parts of the compression vibration sensor, ensure the insulation performance, rigidity and assembly consistency of the product, and improve the assembly qualification rate.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A tooling device for assembling the sensitive part of a piezoelectric vibration sensor is provided, which includes a base, a wrench head and a sleeve; a first locating pin and two support columns are provided on the upper end surface of the base, the first locating pin is located in the middle of the base and is used to cooperate with the housing of the sensitive part of the sensor; the two support columns are respectively located on both sides of the first locating pin; a pressing plate is provided on the top of the two support columns, two second locating pins are provided in the middle of the lower end surface of the pressing plate, a locating block is provided below the second locating pin, the locating block cooperates with the inner diameter of the housing of the sensitive part of the sensor, and the sensitive part of the sensor is provided between the locating block and the base; the sleeve passes through the pressing plate and is located inside the sensitive part of the sensor and is coaxially cooperated with multiple parts inside the sensitive part of the sensor; the wrench head applies a pre-tightening torque to the multiple parts inside the sensitive part of the sensor.

[0006] Furthermore, two studs are respectively arranged on the top of the two support columns, and the two sides of the pressure plate are respectively slidably matched with the two studs, and each stud is threadedly connected with a nut, and each nut is located above the pressure plate. The pressure plate is moved downward by tightening the nut, so that the position of the pressure plate is adjusted so that the second positioning pin on the pressure plate presses the positioning block to fix the housing of the sensitive part of the sensor, thereby completing the installation and fixation of the housing of the sensitive part of the sensor.

[0007] The basic principle of a tooling device for assembling the sensitive part of a piezoelectric vibration sensor in the present invention is as follows: placing the bottom of the outer shell of the sensitive part of the sensor on the upper end surface of the base, and making the inner hole in the outer shell of the sensitive part of the sensor cooperate with the first positioning pin so that the outer shell of the sensitive part of the sensor is fixed on the upper end surface of the base, taking out the positioning block from the outer shell of the sensitive part of the sensor, and then installing the pressing plate on two supporting columns, pressing the pressing plate downward so that the two second positioning pins on the lower end surface of the pressing plate are limited and fixed with multiple parts inside the sensor, rotating and pulling out the sleeve, and finally using the wrench head to apply a pre-tightening torque to the multiple parts, effectively integrating the scattered parts into an integrated structure with good pre-tightening stiffness, completing the assembly of the sensitive part of the sensor, disassembling the pressing plate, removing the assembled sensitive part of the sensor from the base, and then testing the product performance.

[0008] The beneficial effects of the present invention are as follows: a tooling device for assembling the sensitive part of a piezoelectric vibration sensor of the present invention ensures the inner circle coaxiality of the scattered parts set in the sensitive part of the compression vibration sensor by setting a shaft sleeve, thereby ensuring insulation performance and improving the assembly qualification rate; ensures the outer circle coaxiality of the scattered parts set in the sensitive part of the compression vibration sensor by setting a positioning block, thereby ensuring product rigidity; the wrench head applies a pre-tightening torque to multiple parts, effectively integrating the scattered parts into an integrated structure with good pre-tightening stiffness, while ensuring the consistency of product assembly force, ensuring the accuracy and consistency of each assembly, and improving the overall performance of the sensitive part of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The figure is a three-dimensional structural diagram of a tooling device used to assemble the sensitive part of a piezoelectric vibration sensor.

[0010] Among them, 1. base; 2. positioning block; 3. shaft sleeve; 4. first positioning pin; 5. second positioning pin; 6. wrench head; 7. support column; 8. pressure plate; 9. nut. DETAILED DESCRIPTION

[0011] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0012] like Figure 1 As shown, the present invention provides a tooling device for assembling the sensitive part of a piezoelectric vibration sensor, which includes a base 1, a wrench head 6 and a sleeve 3; the upper end surface of the base 1 is provided with a first locating pin 4 and two support columns 7, the first locating pin 4 is located in the middle of the base 1 and is used to cooperate with the housing of the sensitive part of the sensor; the two support columns 7 are respectively located on both sides of the first locating pin 4; a pressing plate 8 is provided on the top of the two support columns 7, two second locating pins 5 are provided in the middle of the lower end surface of the pressing plate 8, a locating block 2 is provided below the second locating pin 5, the locating block 2 cooperates with the inner diameter of the housing of the sensitive part of the sensor, and the sensitive part of the sensor is provided between the locating block 2 and the base 1; the sleeve 3 passes through the pressing plate 8 and is located inside the sensitive part of the sensor and is coaxially matched with multiple parts inside the sensitive part of the sensor; the wrench head 6 applies a pre-tightening torque to the multiple parts inside the sensitive part of the sensor.

[0013] Two studs are respectively arranged on the top of the two support columns 7, and the two sides of the pressure plate 8 are respectively slidably matched with the two studs, and each stud is threadedly connected with a nut 9, and each nut 9 is located above the pressure plate 8. The pressure plate 8 is moved downward by tightening the nut 9, so that the position of the pressure plate 8 is adjusted so that the second positioning pin 5 on it presses the positioning block 2 to fix the housing of the sensitive part of the sensor, and the installation and fixation of the housing of the sensitive part of the sensor is completed.

[0014] When using this tooling device to assemble the sensitive part of the sensor: first, place the bottom of the housing of the sensitive part of the sensor on the upper end surface of the base 1, and let the inner hole in the housing of the sensitive part of the sensor cooperate with the first positioning pin 4, so that the housing of the sensitive part of the sensor is fixed on the upper end surface of the base 1; then take out the positioning block 2 from the housing of the sensitive part of the sensor, and then install the pressure plate 8 on the two support columns 7, tighten the nut 9 to press the pressure plate 8 down, so that the bottom of the two second positioning pins 5 on the lower end surface of the pressure plate 8 is in close contact with the top of the multiple parts inside the sensor to achieve limited fixation, and the rotating sleeve 3 will be pulled out of the housing of the sensitive part of the sensor, and finally use the wrench head 6 to apply a pre-tightening torque to the multiple parts, effectively integrating the scattered parts into an integrated structure with good pre-tightening stiffness, completing the assembly of the sensitive part of the sensor, disassembling the pressure plate 8, and removing the assembled sensitive part of the sensor from the base 1, and then the product performance can be tested.

[0015] The present invention provides a tooling device for assembling the sensitive part of a piezoelectric vibration sensor. The shaft sleeve 3 is provided to ensure the inner circle coaxiality of the scattered parts set in the sensitive part of the compression vibration sensor, thereby ensuring the insulation performance and improving the qualified rate of assembly. The positioning block 2 is provided to ensure the outer circle coaxiality of the scattered parts set in the sensitive part of the compression vibration sensor and ensure the rigidity of the product. The wrench head 6 applies a pre-tightening torque to multiple parts, effectively integrating the scattered parts into an integrated structure with good pre-tightening stiffness, while ensuring the consistency of the force applied during product assembly, ensuring the accuracy and consistency of each assembly, and improving the overall performance of the sensitive part of the sensor.

Claims

1. A tooling device for assembling the sensitive part of a piezoelectric vibration sensor, characterized in that: It includes a base, a wrench head and a sleeve; the upper end surface of the base is provided with a first locating pin and two supporting columns, the first locating pin is located in the middle of the base and is used to cooperate with the housing of the sensitive part of the sensor; the two supporting columns are respectively located on both sides of the first locating pin; a pressure plate is provided on the top of the two supporting columns, two second locating pins are provided in the middle of the lower end surface of the pressure plate, a positioning block is provided below the second locating pin, the positioning block cooperates with the inner diameter of the housing of the sensitive part of the sensor, and the sensitive part of the sensor is provided between the positioning block and the base; the sleeve passes through the pressure plate and is located inside the sensitive part of the sensor and is coaxially matched with multiple parts inside the sensitive part of the sensor; the wrench head applies a pre-tightening torque to the multiple parts inside the sensitive part of the sensor.

2. The tooling device for assembling the sensitive part of the piezoelectric vibration sensor according to claim 1, characterized in that: Two studs are respectively arranged on the tops of the two support columns, and the two sides of the pressure plate are respectively slidably matched with the two studs. A nut is threadedly connected to each stud, and each nut is located above the pressure plate.

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