Mechanical tool for assembling piezoelectric vibration sensor

Abstract

The utility model discloses a mechanical tool for assembling a piezoelectric vibration sensor, which comprises an H-shaped metal base, a pre-tightening screw, a tray, a positioning module, an upper top plate, a first positioning screw, a second positioning screw and a third positioning screw, a sensor assembling groove is formed in the middle of the positioning module, the bottom of the groove is in threaded connection with a pre-tightening screw, and the upper top plate is arranged at the top of the groove and provided with a middle positioning hole, a first positioning screw, a second positioning screw and a third positioning screw, the positioning module is provided with a first through hole corresponding to the first positioning screw, the tray is provided with a second through hole corresponding to the second positioning screw, and the upper top plate is fixedly connected with the H-shaped metal base through a third positioning screw. According to the utility model, positioning and pre-tightening functions can be realized, accurate positions of all parts of the sensor during assembling and working are ensured, and the applied pre-tightening force is uniform.

Description

Technical Field

[0001] The utility model relates to a mechanical tool, in particular to a mechanical tool used for assembling a piezoelectric vibration sensor. Background Art

[0002] Piezoelectric vibration sensors are often used for impact testing in various environments. For many piezoelectric vibration sensors, the assembly method of the sensor is one of the main factors affecting performance. When assembling without using tools with part positioning and pre-tightening functions, the sensor may have a larger lateral sensitivity and a smaller resonant frequency, affecting its main performance. In addition, piezoelectric materials are prone to breakage when facing processing, assembly, impact, etc., which will affect the reliability of device testing and is not conducive to application. Therefore, it is necessary to develop a mechanical tooling that can be used to assemble piezoelectric vibration sensors to complete the assembly of the sensor to ensure the positioning of the sensor components and the pre-tightening of the piezoelectric material. Utility Model Content

[0003] The purpose of the utility model is to provide a mechanical tooling for assembling a piezoelectric vibration sensor, which can realize the positioning and pre-tightening functions, ensure the accurate position of each component of the sensor during assembly and operation, and apply the pre-tightening force evenly, thereby ensuring the comprehensive performance of the sensor.

[0004] The technical solution of the utility model is as follows:

[0005] A mechanical tooling for assembling a piezoelectric vibration sensor, comprising an H-shaped metal base, a pre-tightening screw, a tray, a positioning module, an upper top plate, two first positioning screws, two second positioning screws and two third positioning screws, wherein a groove is provided on the top of the H-shaped metal base, the positioning module and the tray are placed in the groove from top to bottom, a sensor assembly groove is provided in the middle of the positioning module, a first threaded hole is provided at the bottom of the groove, the pre-tightening screw is threadedly connected in the first threaded hole, the upper top plate is placed on the top of the groove, and a positioning hole in the middle and second threads symmetrically located on both sides of the positioning hole are provided on the upper top plate. A threaded hole, a third threaded hole and a fourth threaded hole, the first positioning screw is threadedly connected to the second threaded hole, the second positioning screw is threadedly connected to the third threaded hole, the third positioning screw is threadedly connected to the fourth threaded hole, a first through hole corresponding to the second threaded hole is provided on the positioning module, the positioning module is movably connected to the first positioning screw, a second through hole corresponding to the third threaded hole is provided on the tray, the tray is movably connected to the second positioning screw, fifth threaded holes are provided on both sides of the H-shaped metal base, and the upper top plate and the H-shaped metal base are fixedly connected by the third positioning screw.

[0006] Wherein, the tray is a square tray.

[0007] Wherein, the positioning module includes a first positioning plate, a second positioning plate, a first pin and a second pin, the first positioning plate and the second positioning plate are symmetrically placed on the tray, the sensor assembly groove is formed between the first positioning plate and the second positioning plate, a first socket is provided at the front of the first positioning plate and the second positioning plate, the first positioning plate and the first socket of the second positioning plate are fixed by the first pin, a second socket is provided at the rear of the first positioning plate and the second positioning plate, the first positioning plate and the second socket of the second positioning plate are fixed by the second pin.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] (1) The utility model has a simple structure, is easy to assemble, and has convenient and quick assembly operation;

[0010] (2) When assembling the sensor, the utility model can ensure that the positions of the various components of the sensor are accurate when the sensor is working, and can effectively reduce the lateral sensitivity of the sensor;

[0011] (3) The utility model can ensure uniform force when the sensor applies preload and can preset the preload, thus reducing the risk of component damage;

[0012] (4) The sensor assembled using the utility model has better performance, high reliability and good comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the structure of a mechanical tooling for assembling a piezoelectric vibration sensor provided by the utility model;

[0015] Figure 2 This is a cross-sectional view of the positioning module of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0018] Example

[0019] See also Figure 1 The present embodiment provides a mechanical tooling for assembling a piezoelectric vibration sensor, including an H-shaped metal base 1, a pre-tightening screw 2, a square tray 3, a positioning module 4, an upper top plate 5, two first positioning screws 6, two second positioning screws 7 and two third positioning screws 8. A groove 11 is provided on the top of the H-shaped metal base 1, and the positioning module 4 and the square tray 3 are placed in the groove 11 from top to bottom; a sensor assembly groove 41 is provided in the middle of the positioning module 4 for placing the base of the sensor when assembling the sensor; a first threaded hole is provided at the bottom of the groove 11, and the pre-tightening screw 2 is threadedly connected in the first threaded hole. The pre-tightening screw 2 is used to apply a pre-tightening force. By tightening the pre-tightening screw 2, an upward force can be generated to push the square tray 3 and the positioning module 4 thereon to move; the upper top plate 5 is placed on the top of the groove 11 to limit the highest point of the sensor rise, and cooperate with the upward force of the square tray 3 to evenly apply a pre-tightening force to the sensitive element of the sensor; the upper top plate 5 is provided with a positioning hole 51 located in the middle and a second threaded hole, a third threaded hole and a second threaded hole 51 symmetrically located on both sides of the positioning hole 51. The fourth threaded hole and the middle positioning hole 51 can be used to fix the mass block of the sensor and facilitate the assembly of the pre-tightening screw 2. The first positioning screw 6 is threadedly connected to the second threaded hole, the second positioning screw 7 is threadedly connected to the third threaded hole, and the third positioning screw 8 is threadedly connected to the fourth threaded hole. A first through hole 42 corresponding to the second threaded hole is provided on the positioning module 4. The positioning module 4 is movably connected to the first positioning screw 6 so that the positioning module 4 can move up and down. A second through hole corresponding to the third threaded hole is provided on the square tray 3. The square tray 3 is movably connected to the second positioning screw 7 so that the square tray 3 can move up and down under the thrust of the pre-tightening screw 2. Fifth threaded holes are provided on both sides of the H-shaped metal base 1, and the upper top plate 5 and the H-shaped metal base 1 are fixedly connected by the third positioning screw 8.

[0020] Combination Figure 2 As shown, the positioning module 4 includes a first positioning plate 43, a second positioning plate 44, a first latch 45, and a second latch 46. The first positioning plate 43 and the second positioning plate 44 are symmetrically placed on the square tray 3. A sensor assembly slot 41 is formed between the first positioning plate 43 and the second positioning plate 44. A first plug hole is provided at the front of the first positioning plate 43 and the second positioning plate 44. The first positioning plate 43 and the first plug hole of the second positioning plate 44 are fixed by the first latch 45. A second plug hole is provided at the rear of the first positioning plate 43 and the second positioning plate 44. The first positioning plate 43 and the second positioning plate 44 are fixed by the second latch 46. The positions of the various components of the sensor can be limited by the first positioning plate 43 and the second positioning plate 44 to ensure the accuracy of assembly; the first latch 45 and the second latch 46 play the role of fixing the first positioning plate 43 and the second positioning plate 44.

[0021] Instructions for use: First, place the various parts of the sensor in the sensor assembly groove 41 between the first positioning plate 43 and the second positioning plate 44 of the positioning module 4, and then assemble the first positioning plate 43 and the second positioning plate 44 into one piece through the first latch 45 and the second latch 46; then place the positioning module 4 and the square tray 3 in the groove of the H-shaped metal base 1, and then place the top plate 5 on the top of the H-shaped metal base 1, and fix the positioning module 4 and the square tray 3 with the first positioning screw 6 and the second positioning screw 7 respectively, adjust the position of the positioning module 4 so that the mass block of the sensor is against the positioning hole 51 of the top plate 5 to ensure the position of the mass block, and then fix the mass block with the third positioning screw 6 and the second positioning screw 7. The screw 8 fixes the upper top plate 5 on the H-shaped metal base 1; then use a wrench that can set the pre-tightening torque to tighten the pre-tightening screw 2 upwards, and the square tray 3 is displaced upward by the force from the pre-tightening screw 2. The mass block of the sensor contacts the upper top plate 5 and generates pressure until the preset torque value is reached. The pre-tightening screw is installed on the sensor through the positioning hole 51 to maintain the pre-tightening force; finally, rotate the pre-tightening screw 2 in the opposite direction, remove the upper top plate 5, the positioning module 4, and the square tray 3 in turn, and then remove the first pin 45 and the second pin 46 of the positioning module 4, and take out the sensor pre-tightened between the first positioning plate 43 and the second positioning plate 44, thus completing the positioning and pre-tightening of the sensor.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical tool for assembling a piezoelectric vibration sensor, characterized in that: It includes an H-shaped metal base, a pre-tightening screw, a tray, a positioning module, an upper top plate, two first positioning screws, two second positioning screws and two third positioning screws. The top of the H-shaped metal base is provided with a groove, the positioning module and the tray are placed in the groove from top to bottom, the middle of the positioning module is provided with a sensor assembly groove, the bottom of the groove is provided with a first threaded hole, the pre-tightening screw is threadedly connected in the first threaded hole, the upper top plate is placed at the top of the groove, the upper top plate is provided with a positioning hole located in the middle and a second threaded hole, a third threaded hole and a fourth threaded hole symmetrically located on both sides of the positioning hole, the first positioning screw is threadedly connected to the second threaded hole, the second positioning screw is threadedly connected to the third threaded hole, the third positioning screw is threadedly connected to the fourth threaded hole, the positioning module is provided with a first through hole corresponding to the second threaded hole, the positioning module is movably connected to the first positioning screw, the tray is provided with a second through hole corresponding to the third threaded hole, the tray is movably connected to the second positioning screw, both sides of the H-shaped metal base are provided with fifth threaded holes, and the upper top plate and the H-shaped metal base are fixedly connected by the third positioning screw.

2. A mechanical tooling for assembling a piezoelectric vibration sensor according to claim 1, characterized in that: The tray is a square tray.

3. A mechanical tooling for assembling a piezoelectric vibration sensor according to claim 1 or 2, characterized in that: The positioning module includes a first positioning plate, a second positioning plate, a first latch and a second latch. The first positioning plate and the second positioning plate are symmetrically placed on the tray. The sensor assembly groove is formed between the first positioning plate and the second positioning plate. A first socket is provided at the front of the first positioning plate and the second positioning plate. The first positioning plate and the first socket of the second positioning plate are fixed by the first latch. A second socket is provided at the rear of the first positioning plate and the second positioning plate. The first positioning plate and the second socket of the second positioning plate are fixed by the second latch.

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