Plane shearing type piezoelectric vibration sensor assembly assembling tool

Abstract

The invention provides a plane shearing type piezoelectric vibration sensor assembly assembling tool. The plane shearing type piezoelectric vibration sensor assembly assembling tool comprises a bottom plate; the supporting block is fixedly arranged on the bottom plate, and a first groove matched with one side of the plane shearing type piezoelectric vibration sensor assembly is formed in the supporting block; the pressing block is movably arranged on the bottom plate, the pressing block is provided with a second groove matched with the other side of the plane shearing type piezoelectric vibration sensor assembly, the pressing block can press the plane shearing type piezoelectric vibration sensor assembly on the supporting block, and the pressing block is provided with a through round hole; and the adapter can penetrate through the through round hole and apply a pre-tightening force to the plane shearing type piezoelectric vibration sensor assembly. According to the invention, rapid and orderly assembly and pre-tightening force application of a plurality of piezoelectric elements, insulating sheets and lug plates of a plane shearing type piezoelectric vibration sensor assembly are realized under the condition that circumferential constraint is difficult to pass, and coaxial assembly and fixation of parts on two sides of the sensor assembly are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of assembly tools, and in particular to an assembly tool for a plane shearing type piezoelectric vibration sensor component. Background Art

[0002] Piezoelectric vibration sensors use piezoelectric elements as sensitive elements and convert the input vibration acceleration into a charge signal output for measurement through the piezoelectric effect. They have the advantages of self-generation, high operating temperature, strong anti-electromagnetic interference ability, and high reliability. They are widely used in vibration state measurement fields such as aviation, aerospace, and ships. According to the different assembly structures, piezoelectric vibration sensors are mainly divided into compression type and shear type. Compared with compression type structural sensors, shear type sensors are relatively small in size, can achieve a larger bandwidth (the maximum operating frequency can be widened to 15000Hz or even 25000Hz) and lower lateral output, and have relatively lower transient temperature sensitivity and better temperature characteristics. The demand in the field of vibration monitoring is increasing year by year. Among shear type sensors, the plane shear type is its most typical structural form. One of the common structural forms is shown in the attached figure. Figure 1 The base 1' of the plane shear type vibration sensor assembly is symmetrically equipped with an insulating sheet 5', a wiring piece 7', a piezoelectric element 6', a wiring piece 7', a piezoelectric element 6', a wiring piece 7', an insulating sheet 5' and a mass block 4' on both sides, and is fixed by applying a pre-tightening force through a screw 3' and two nuts 2'. When installed at the vibration measuring part, the base 1' of the sensor assembly feels the same vibration as the vibration measuring part, and the mass block 4' is subjected to the inertial force opposite to the acceleration direction and applies a tangential alternating force proportional to the acceleration to the piezoelectric element 6'. Due to the positive piezoelectric effect of the piezoelectric element, an alternating charge with an amount of charge proportional to the acceleration is generated on the electrode surface. When the vibration frequency is much lower than the natural frequency of the sensor assembly, the output charge is proportional to the force, that is, proportional to the acceleration. Based on the above working principle, in order to improve the consistency of product quality and the stability of signal output, in addition to controlling the processing quality, flatness and roughness of each part, the neatness and pre-tightening force of the assembly of such sensor assemblies also need to be strictly controlled.

[0003] However, by the attached Figure 1 It can be seen that in order to facilitate the adjustment of the charge output performance of the sensor assembly, the mass block of this type of sensor assembly is not consistent with the piezoelectric element, wiring piece, and insulating sheet in the vertical direction, and the sensor assembly has wiring pieces led out and fixed in the parallel front and rear directions. Therefore, the sensor assembly is difficult to be fixed by constraints in the vertical and horizontal directions during the assembly process. In the past, the assembly of sensor assemblies of this type of structure only used simple manual tools, and the preload operation was inconvenient and inaccurate. In addition, the assembled sensor assembly had multiple piezoelectric elements, wiring pieces, and insulating sheets that were not neatly stacked, which resulted in poor performance output consistency of the sensor assembly or unqualified performance of some components. Summary of the invention

[0004] In view of this, the present invention provides a planar shear type piezoelectric vibration sensor component assembly tool to achieve the purpose of improving the production efficiency, consistency and product qualification rate of the planar shear type piezoelectric vibration sensor component.

[0005] The present invention provides the following technical solutions: a plane shear type piezoelectric vibration sensor assembly assembly tool, comprising: a base plate; a support block, fixedly arranged on the base plate, the support block is provided with a first groove that cooperates with one side of the plane shear type piezoelectric vibration sensor assembly; a clamping block, movably arranged on the base plate, the clamping block is provided with a second groove that cooperates with the other side of the plane shear type piezoelectric vibration sensor assembly, and the clamping block can press the plane shear type piezoelectric vibration sensor assembly onto the support block, and the clamping block is provided with a through circular hole; an adapter, which can pass through the through circular hole and apply a pre-tightening force to the plane shear type piezoelectric vibration sensor assembly.

[0006] Further, the first groove includes a first square groove and a first circular groove, and the first circular groove is arranged in the first square groove.

[0007] Furthermore, the first circular groove is provided with two first positioning pins spaced apart and distributed in a straight line.

[0008] Further, the second groove includes a second square groove and a second circular groove, the second circular groove is arranged in the second square groove, and the through circular hole is connected to the second circular groove.

[0009] Furthermore, the plane shear type piezoelectric vibration sensor assembly assembly tool also includes a guide rail fixedly arranged on the bottom plate, and the pressing block is arranged on the guide rail and can slide relative to the guide rail.

[0010] Furthermore, the plane shear type piezoelectric vibration sensor assembly tool also includes a fixing block and a bolt, wherein the fixing block is fixedly arranged on the bottom plate, the bolt passes through the fixing block and is connected to the clamping block, and the bolt can drive the clamping block to slide relative to the guide rail.

[0011] Furthermore, one end of the adapter is a screwing end, and the other end of the adapter is provided with two second positioning pins spaced apart and arranged in a straight line.

[0012] Furthermore, the plane shear type piezoelectric vibration sensor assembly assembly tool also includes a stopper, which abuts against the plane shear type piezoelectric vibration sensor assembly when the adapter does not fully apply the pre-tightening force to the plane shear type piezoelectric vibration sensor assembly.

[0013] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted by the present invention include at least:

[0014] (1) The assembly tool solves the problem of the plane shear type piezoelectric vibration sensor assembly being difficult to achieve quick and neat assembly and preload application of multiple piezoelectric elements, insulating sheets, and wiring sheets under circumferential constraints, and ensures that the components on both sides of the sensor assembly are coaxially assembled and fixed.

[0015] (2) When designing the assembly tool, support blocks and clamping blocks are used to fix the mass block in the sensor assembly. The insulating sheet, piezoelectric element, and wiring piece are mechanically shaped by the block. The clamping block is driven by the screw bolt under the action of the straight guide rail to clamp the sensor assembly in the left and right directions as shown in the figure, so as to ensure the neatness and consistency of the assembly as much as possible.

[0016] (3) The assembly tool is designed with a larger base plate in consideration of the actual assembly work. The entire assembly tool is sturdy and stable, and can effectively prevent potential hazards such as tipping over and bumping during the assembly process.

[0017] (4) The assembly method of the sensor assembly using this assembly tool is simple, has high operational feasibility, and has good flexibility, which effectively improves production efficiency, consistency, and product qualification rate.

[0018] (5) During the design, the assembly requirements of sensor assemblies with the same structural form but different performance output requirements, which may use piezoelectric elements of different specifications and numbers or mass blocks of different sizes and weights, are taken into consideration. The upper part of the support block and the clamping block of the assembly tool is provided with a square groove with the same width as the mass block in the sensor assembly and a length slightly longer than the mass block. The clamping block can be driven to move along the left and right squares shown in the figure by rotating the bolts under the action of the straight guide rail. The assembly tool has high adjustment flexibility and method versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the prior art;

[0021] Figure 2 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the support block structure of an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of a compression block according to an embodiment of the present invention;

[0024] Figure 5Schematic diagram of the block structure of an embodiment of the present invention.

[0025] Reference numerals in the figure: 1, base plate; 2, support block; 3, clamping block; 4, fixing block; 5, bolt; 6, first positioning pin; 7, second positioning pin; 8, adapter; 9, guide rail; 10, stop block. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0028] like Figures 2 to 5 As shown, an embodiment of the present invention provides a planar shear type piezoelectric vibration sensor assembly tool, including a base plate 1, a support block 2, a pressing block 3 and an adapter 8.

[0029] The support block 2 is fixedly arranged on the base plate 1, and is provided with a first groove matching with one side of the plane shear type piezoelectric vibration sensor assembly; the clamping block 3 is movably arranged on the base plate 1, and is provided with a second groove matching with the other side of the plane shear type piezoelectric vibration sensor assembly, and the clamping block 3 can press the plane shear type piezoelectric vibration sensor assembly onto the support block 2, and is provided with a through circular hole; the adapter 8 can pass through the through circular hole and apply a pre-tightening force to the plane shear type piezoelectric vibration sensor assembly.

[0030] The present invention solves the problem that a planar shear-type piezoelectric vibration sensor assembly is difficult to realize rapid and neat assembly and pre-tightening force application of multiple piezoelectric elements, insulating sheets and wiring sheets through circumferential constraints, and ensures that components on both sides of the sensor assembly are coaxially assembled and fixed.

[0031] Specifically, the first groove includes a first square groove and a first circular groove, the first circular groove is arranged in the first square groove. The second groove includes a second square groove and a second circular groove, the second circular groove is arranged in the second square groove, and the through hole is connected to the second circular groove.

[0032] The first square groove has the same width as the mass block 4' in the sensor assembly, and is slightly longer than the mass block 4'. The first circular groove matches the nut 2' in the sensor assembly. The second square groove has the same width as the mass block 4' in the sensor assembly, and is slightly longer than the mass block 4'. The second circular groove matches the nut 2' in the sensor assembly.

[0033] It should be noted that the diameter of the through circular hole is slightly larger than the maximum diameter of the adapter 8 .

[0034] Furthermore, the first circular groove is provided with two pin holes, and two first positioning pins 6 are provided in the two pin holes. The two first positioning pins 6 are spaced and located on the same straight line, and the first positioning pins 6 can be matched with the groove of the nut 2' in the sensor assembly. The two first positioning pins 6 are connected and fixed to the support block 2 by interference fit.

[0035] like Figure 2 As shown, the plane shear type piezoelectric vibration sensor assembly assembly tool also includes a guide rail 9, which is fixedly arranged on the base plate 1, and the clamping block 3 is arranged on the guide rail 9 and can slide relative to the guide rail 9. The clamping block 3 can move on the guide rail 9 and can be locked relative to the guide rail 9, so as to fix the relative position between the clamping block 3 and the support block 2.

[0036] Preferably, the plane shear type piezoelectric vibration sensor assembly tool also includes a fixing block 4 and a bolt 5, the fixing block 4 is fixedly arranged on the base plate 1, the bolt 5 passes through the fixing block 4 and is connected to the clamping block 3, and the bolt 5 can drive the clamping block 3 to slide relative to the guide rail 9.

[0037] The fixing block 4 and the straight guide rail 9 are rigidly fixed to the base plate 1 by stud screws respectively.

[0038] One end of the adapter 8 is a screwing end, and the other end of the adapter 8 is provided with two second positioning pins 7 arranged at intervals, and the second positioning pins 7 are located on the same straight line. The screwing end is hexagonal in shape, which is convenient for matching with a torque wrench. The other end of the adapter 8 is connected and fixed with the second positioning pin 7 by interference fit.

[0039] The first positioning pin 6 and the second positioning pin 7 can cooperate with the groove of the nut 2' in the sensor assembly, and after being assembled with the support block 2 and the adapter 8 respectively, the pre-tightening force can be applied during the assembly of the sensor assembly with the assistance of a torque wrench.

[0040] In the embodiment of the present invention, the first positioning pin 6 and the second positioning pin 7 have the same structure.

[0041] The plane shear type piezoelectric vibration sensor assembly assembly tool also includes a stopper 10. When the adapter 8 does not fully apply the preload force to the plane shear type piezoelectric vibration sensor assembly, the stopper 10 abuts against the plane shear type piezoelectric vibration sensor assembly. The stopper 10 is used to neatly assemble the piezoelectric element, the wiring piece, the insulating sheet and the mass block before fully applying the preload force during the sensor assembly process. The lower height of the stopper 10 is designed to be the gap height between the insulating sheet 5', the piezoelectric element 6' and the wiring piece 7' in the sensor assembly and the lower upper end surface of the base 1', and the width of the stopper 10 is designed to be the width between the side of the base 1' in the sensor assembly and the mass block 4'.

[0042] The specific working process of the embodiment of the present invention is as follows:

[0043] First, the support block 2 is connected and fixed with the two first positioning pins 6 by interference fit, and then connected with the bottom plate 1, the clamping block 3, the fixing block 4, the bolts 5, and the guide rails 9 according to the attachment. Figure 2 Assembly. When assembling the plane shear type vibration sensor assembly, firstly, according to the drawing, assemble the mass block 4', insulating sheet 5', piezoelectric element 6' and wiring piece 7' with the base 1', nut 2' and screw 3' in sequence, and then place the assembled sensor assembly on the platform of the assembly tool support block 2. The mass block 4' and nut 2' on one side of the sensor assembly are placed in the first square groove and the first circular groove of the support block 2, and the notch of the nut 2' cooperates with the two first positioning pins 6.

[0044] The mass block 4' and nut 2' on the other side of the sensor assembly are placed in the second square groove and the second circular groove of the clamping block 3. The two stoppers 10 are respectively inserted into the gap between the insulating sheet 5', the piezoelectric element 6' and the wiring piece 7' in the sensor assembly from the front and rear directions of the sensor assembly on both sides of the base 1' to the upper end surface of the lower part of the base 1' to achieve shaping. The bolt 5 is screwed under the action of the guide rail 9 to drive the clamping block 3 along the attached Figure 2 As shown in the figure, tighten in the left and right directions. Fix the adapter 8 and the two second positioning pins 7 by interference fit, and apply the set pre-tightening force value by screwing the six sides of the adapter 8 with the help of a torque wrench. Then screw the bolt 5 in the opposite direction, remove the sensor assembly from the assembly tool to complete the assembly.

[0045] The beneficial effects of the present invention are:

[0046] (1) The assembly tool solves the problem of the plane shear type piezoelectric vibration sensor assembly being difficult to achieve quick and neat assembly and preload application of multiple piezoelectric elements, insulating sheets, and wiring sheets under circumferential constraints, and ensures that the components on both sides of the sensor assembly are coaxially assembled and fixed.

[0047] (2) When designing the assembly tool, support blocks and clamping blocks are used to fix the mass block in the sensor assembly. The insulating sheet, piezoelectric element, and wiring piece are mechanically shaped by the block. The clamping block is driven by the screw bolt under the action of the straight guide rail to clamp the sensor assembly in the left and right directions as shown in the figure, so as to ensure the neatness and consistency of the assembly as much as possible.

[0048] (3) The assembly tool is designed with a larger base plate in consideration of the actual assembly work. The entire assembly tool is sturdy and stable, effectively preventing potential hazards such as tipping over and bumping during the assembly process.

[0049] (4) The assembly method of the sensor assembly using this assembly tool is simple, has high operational feasibility, and has good flexibility, which effectively improves production efficiency, consistency, and product qualification rate.

[0050] (5) During the design, the assembly requirements of sensor assemblies with the same structural form but different performance output requirements, which may use piezoelectric elements of different specifications and numbers or mass blocks of different sizes and weights, are taken into consideration. The upper part of the support block and the clamping block of the assembly tool is provided with a square groove with the same width as the mass block in the sensor assembly and a length slightly longer than the mass block. The clamping block can be driven to move along the left and right squares shown in the figure by rotating the bolts under the action of the straight guide rail. The assembly tool has high adjustment flexibility and method versatility.

[0051] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A planar shear type piezoelectric vibration sensor assembly assembly tool, characterized in that: include: Bottom plate (1); A support block (2) is fixedly arranged on the bottom plate (1), and a first groove is arranged on the support block (2) to match one side of the plane shear type piezoelectric vibration sensor component; A pressing block (3) is movably arranged on the bottom plate (1), the pressing block (3) is provided with a second groove matched with the other side of the plane shear type piezoelectric vibration sensor component, and the pressing block (3) can press the plane shear type piezoelectric vibration sensor component onto the supporting block (2), and a through circular hole is provided on the pressing block (3); The adapter (8) can pass through the through circular hole and apply a pre-tightening force to the plane shear type piezoelectric vibration sensor assembly.

2. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 1, characterized in that: The first groove includes a first square groove and a first circular groove, and the first circular groove is arranged in the first square groove.

3. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 2, characterized in that: The first circular groove is provided with two first positioning pins (6) which are spaced apart and distributed in a straight line.

4. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 1, characterized in that: The second groove includes a second square groove and a second circular groove, the second circular groove is arranged in the second square groove, and the through circular hole is communicated with the second circular groove.

5. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 1, characterized in that: The plane shear type piezoelectric vibration sensor assembly assembly tool also includes a guide rail (9) fixedly arranged on the base plate (1), and a pressing block (3) is arranged on the guide rail (9) and can slide relative to the guide rail (9).

6. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 5, characterized in that: The planar shear-type piezoelectric vibration sensor assembly assembly tool also includes a fixing block (4) and a bolt (5), wherein the fixing block (4) is fixedly arranged on the base plate (1), the bolt (5) passes through the fixing block (4) and is connected to the clamping block (3), and the bolt (5) can drive the clamping block (3) to slide relative to the guide rail (9).

7. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 1, characterized in that: One end of the adapter (8) is a screwing end, and the other end of the adapter (8) is provided with two second positioning pins (7) spaced apart and arranged in a straight line.

8. The plane shear type piezoelectric vibration sensor assembly assembly tool according to claim 1, characterized in that: The plane shear type piezoelectric vibration sensor assembly assembly tool also includes a stopper (10), and when the adapter (8) does not fully apply a pre-tightening force to the plane shear type piezoelectric vibration sensor assembly, the stopper (10) abuts against the plane shear type piezoelectric vibration sensor assembly.

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