Shell structure of quartz dynamic piezoelectric sensor

Abstract

The utility model relates to the technical field of quartz weighing sensors, and discloses a shell structure of a quartz dynamic piezoelectric sensor, which comprises a beam-type bearing body, two groups of side edge protection layers symmetrically and laterally arranged on two sides of the beam-type bearing body, and a grinding layer buckled at the upper end of the beam-type bearing body, the web plate is of a curved structure, and the curvature radius of the web plate ranges from 10 mm to 16 mm. According to the utility model, the quartz dynamic piezoelectric sensing element is assembled and supported by using the abutting parts which are symmetrically arranged in the piezoelectric cavity in the beam-type supporting body, so that the quartz dynamic piezoelectric sensing element can be assembled in a central assembly mode, and the beam-type supporting body is not easy to deform when being produced. The web can be adaptively assembled with the quartz dynamic piezoelectric sensing element without keeping a smaller curvature radius, and compared with the existing shell structure, the curvature radius of the web is increased, so that the processing difficulty and the processing cost of the beam type supporting body are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of quartz weighing sensors, in particular to a shell structure of a quartz dynamic piezoelectric sensor. Background Art

[0002] The quartz dynamic weighing sensor is a type of dynamic weighing sensor and is also the most advanced weighing sensor currently. It is widely used in high-speed dynamic detection links such as overweight control, non-site law enforcement of overweight control, monitoring of roads and bridges, etc. When external force is applied to the surface of the quartz dynamic sensor, the charge signal is proportional to the applied force (an external charge amplifier is required). The charge amplifier converts the charge into a proportional voltage signal, which can accurately determine the weight of the vehicle in motion.

[0003] As the supporting, force-bearing and protective component of the quartz dynamic sensor, the shell structure determines the service life and force detection accuracy of the quartz dynamic sensor. Therefore, it is an important component structure of the quartz dynamic sensor, as shown in the existing patent technology: After searching, the China Patent Network disclosed a shell structure of a quartz weighing sensor (public announcement number CN209764256U). This type of device can enhance the axial strength of the force-bearing cavity by arranging a support chain in the force-bearing cavity, and can evenly distribute the pressure. The overall structure is stable, and the service life is several times increased on the original basis.

[0004] However, there are still some shortcomings in the shell structure of the quartz weighing sensor adopted by the above-mentioned public patent and the existing market: the existing method of using a single set of support chains as the support carrier of the quartz weighing sensor element to improve the force uniformity of the quartz weighing sensor element requires that the shell be set with a smaller radius of curvature so that the pressure on the shell can be transmitted to the quartz weighing sensor element, and the shell parts with a smaller radius of curvature have higher processing strength and relatively higher processing costs, which is not convenient for production and promotion. To this end, a person skilled in the art provides a shell structure of a quartz dynamic piezoelectric sensor to solve the problems raised in the above background technology. Utility Model Content

[0005] The main purpose of the utility model is to provide a shell structure of a quartz dynamic piezoelectric sensor, which can effectively solve the problems of high processing strength and cost of the existing shell structure of quartz dynamic weighing sensors in the background technology.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a shell structure of a quartz dynamic piezoelectric sensor, including a beam-type carrier, two sets of side protection layers symmetrically mounted on both sides of the beam-type carrier, and a grinding layer snap-fitted to the upper end of the beam-type carrier;

[0007] The beam-type carrier includes a web, and the upper and lower ends of the web are symmetrically provided with pressure-bearing parts. The core of the web is provided with a piezoelectric cavity, and the upper and lower ends of the chamber of the piezoelectric cavity are symmetrically provided with abutment parts, and the piezoelectric cavity is guided and pressed with the quartz dynamic piezoelectric sensor element through the abutment parts.

[0008] The web is a curved structure, and the curvature radius of the web is between 10 mm and 16 mm.

[0009] As a further solution of the utility model: the connection between the abutting portion and the web is a rounded structure.

[0010] As a further solution of the utility model: the side protection layer includes a side protection part and an end protection part, the side protection part is installed on both sides of the plate frame of the web, and the end protection part is installed on both sides of the plate frame of the upper end pressure-bearing part, and the upper extension end of the end protection part remains flush with the end surface of the grinding layer.

[0011] As a further solution of the present invention: the side protection portion is a curved structure, and the inner curved surface of the side protection portion fits snugly with the outer curved surface of the web.

[0012] As a further solution of the utility model: the end protection part is an L-shaped structure, and the inner folded surface of the end protection part fits well with the combination of the pressure-bearing part and the side supporting surface of the grinding layer.

[0013] As a further solution of the utility model: both the upper and lower end faces of the pressure-bearing part are provided with dovetail grooves, and the bottom of the grinding layer is provided with a dovetail tenon that is engaged with the dovetail groove of the upper end face of the pressure-bearing part.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model utilizes the symmetrically arranged abutment parts inside the piezoelectric cavity in the beam-type carrier to support the assembly of the quartz dynamic piezoelectric sensor element, so that the quartz dynamic piezoelectric sensor element can be assembled in a central assembly manner, so that the web has a more flexible adaptation state during production, and there is no need to maintain a small curvature radius. Compared with the existing quartz dynamic piezoelectric sensor housing structure, the curvature radius of the web is increased, thereby reducing the processing difficulty and processing cost of the beam-type carrier, which is more convenient for production, promotion and use.

[0016] 2. The utility model utilizes the side protection layer to support and limit the side of the beam-type carrier and the grinding layer, which can play a side limiting function, so that the outer shell structure is tightly assembled and connected as one, and at the same time has good side protection and wear-resistant protection functions, thereby improving the service life of the quartz dynamic piezoelectric sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the shell structure of a quartz dynamic piezoelectric sensor of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of the shell structure of a quartz dynamic piezoelectric sensor of the utility model;

[0019] Figure 3 It is an exploded plan view of the shell structure of a quartz dynamic piezoelectric sensor of the utility model;

[0020] Figure 4 It is a cross-sectional view of the shell structure of a quartz dynamic piezoelectric sensor of the utility model;

[0021] Figure 5 This is a structural schematic diagram of a beam-type bearing body in a shell structure of a quartz dynamic piezoelectric sensor of the utility model;

[0022] Figure 6 The utility model is a schematic diagram of the structure of the side protection layer in the shell structure of a quartz dynamic piezoelectric sensor.

[0023] In the figure: 1. quartz dynamic piezoelectric sensor element; 2. beam-type carrier; 21. web; 22. piezoelectric cavity; 23. pressure-bearing part; 24. dovetail groove; 25. abutment part; 3. side protection layer; 31. side protection part; 32. end protection part; 4. grinding layer; 41. dovetail tenon. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Please refer to Figure 1-6 As shown, a shell structure of a quartz dynamic piezoelectric sensor includes a beam-type carrier 2, two sets of side protection layers 3 symmetrically mounted on both sides of the beam-type carrier 2, and a grinding layer 4 snap-fitted to the upper end of the beam-type carrier 2. The beam-type carrier 2 includes a web 21, and a piezoelectric cavity 22 is provided through the core of the web 21. The upper and lower ends of the chamber of the piezoelectric cavity 22 are symmetrically provided with abutment portions 25, and the piezoelectric cavity 22 is guided and pressed with the quartz dynamic piezoelectric sensor element 1 through the abutment portion 25. The connection between the abutment portion 25 and the web 21 is a rounded structure. The quartz dynamic piezoelectric sensor element 1 is centrally plugged and assembled using the abutment portion 25 which is symmetrically arranged inside the piezoelectric cavity 22 in the beam-type carrier 2. This allows the pressure on the beam-type carrier 2 to be more evenly and dispersedly transmitted to the quartz dynamic piezoelectric sensor element 1, thereby improving the detection accuracy. It also serves as a guide for installation, allowing the quartz dynamic piezoelectric sensor element 1 to be smoothly and accurately inserted and installed. At the same time, the rounded connection between the abutment portion 25 and the web 21 can better evenly and disperse the pressure and avoid stress concentration.

[0028] The upper and lower ends of the plate frame of the web 21 are symmetrically provided with pressure-bearing parts 23. The web 21 is a curved structure, and the curvature radius of the web 21 is between 10mm and 16mm. Compared with the existing sensors, the support of the abutment part 25 can improve the center installation adaptability of the quartz dynamic piezoelectric sensor element 1, so that the web 21 in the beam-type carrier 2 can increase the production curvature radius, thereby reducing the processing difficulty and processing cost of the beam-type carrier 2, which is more convenient for production, promotion and use.

[0029] The side protection layer 3 includes a side protection portion 31 and an end protection portion 32. The side protection portion 31 is mounted on both sides of the plate frame of the web 21, and the end protection portion 32 is mounted on both sides of the plate frame of the upper end pressure-bearing portion 23. The upper extension end of the end protection portion 32 is flush with the end surface of the grinding layer 4. The side protection portion 31 is a curved structure, and the inner curved surface of the side protection portion 31 is fitted with the outer curved surface of the web 21. The end protection portion 32 is an L-shaped structure, and the inner folded surface of the end protection portion 32 is fitted with the combination of the pressure-bearing portion 23 and the side support surface of the grinding layer 4. By utilizing the side protection portion in the side protection layer 3 The protective part 31 is adapted to the sheath of the web 21, and the end protective part 32 is adapted to the sheath of the pressure-bearing part 23 and the grinding layer 4 combination, which can improve the integrated assembly performance of the outer shell structure, so that the outer shell structure is tightly assembled and connected as a whole, and at the same time, it has good side protection and wear-resistant protection functions, thereby increasing the service life of the quartz dynamic piezoelectric sensor. The side protection layer 3 is preferably made of rubber and plastic. While extending toward the grinding layer 4, it can facilitate the formation of a groove for pouring or installing the grinding layer 4 on the top of the beam-type carrier 2, thereby facilitating the precise installation and use of the grinding layer 4.

[0030] The upper and lower end faces of the pressure-bearing part 23 are both provided with dovetail grooves 24, and the bottom of the grinding layer 4 is provided with a dovetail tenon 41 that is engaged with the dovetail groove 24 on the upper end face of the pressure-bearing part 23. When the grinding layer 4 is assembled and connected to the beam-type carrier 2 as a pressure-bearing component, the dovetail tenon 41 at its bottom is adapted to the dovetail groove 24 on the upper end face of the beam-type carrier 2, which can ensure the stability of the grinding layer 4 and improve the stability and reliability of the structure. The design combination of the dovetail groove 24 and the dovetail tenon 41 can ensure that the grinding layer 4 can be tightly connected to the top of the beam-type carrier 2 and can withstand external pressure and vibration, and is not easy to loosen or fall off, thereby improving the working efficiency and service life of the quartz dynamic piezoelectric sensor. The grinding layer 4 is preferably a concrete layer. The concrete layer has a large Young's modulus and an obvious unloading effect. The grinding layer 4 can be directly cast on the top of the beam-type carrier 2, or the prefabricated grinding layer 4 can be installed by snapping with the dovetail groove 24 and the dovetail tenon 41, thereby ensuring the stability of the grinding layer 4.

[0031] The working principle of the utility model is as follows: when the shell structure is used as the bearing component of the quartz dynamic piezoelectric sensor element 1, the abutment portion 25 symmetrically arranged in the piezoelectric cavity 22 of the beam-type carrier 2 is used. On the one hand, the quartz dynamic piezoelectric sensor element 1 is centrally plugged and assembled, so that the pressure on the beam-type carrier 2 is more evenly and dispersedly transmitted to the quartz dynamic piezoelectric sensor element 1, thereby improving the detection accuracy. On the other hand, it can guide the installation of the quartz dynamic piezoelectric sensor element 1, so that the quartz dynamic piezoelectric sensor element 1 can be smoothly and accurately inserted into the piezoelectric cavity 22 of the beam-type carrier 2, thereby reducing the occurrence of the quartz dynamic piezoelectric sensor element 1 when being inserted and installed. The possibility of displacement is eliminated, and by installing the central support of the quartz dynamic piezoelectric sensor element 1, the web 21 in the beam-type carrier 2 has more flexible adaptability during production, and there is no need to maintain a small curvature radius to adapt and assemble with the quartz dynamic piezoelectric sensor element 1. Compared with the existing quartz dynamic piezoelectric sensor shell structure, the curvature radius of the web 21 is increased, and the processing difficulty and cost of the beam-type carrier 2 are reduced. Further, the extended limit of the side protection layer 3 can be utilized, and the grinding layer 4 can be accurately and firmly assembled with the beam-type carrier 2 in a mortise and tenon installation manner, so that the shell structure is tightly assembled and connected as a whole, thereby improving the stability and reliability of the shell structure.

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A shell structure of a quartz dynamic piezoelectric sensor, characterized in that: It comprises a beam-type carrier (2), two sets of side protection layers (3) symmetrically mounted on both sides of the beam-type carrier (2), and a grinding layer (4) snap-fitted to the upper end of the beam-type carrier (2); The beam-type carrier (2) comprises a web (21), the upper and lower ends of the plate frame of the web (21) are symmetrically provided with pressure-bearing parts (23), and the core of the web (21) is provided with a piezoelectric cavity (22) through it, the upper and lower ends of the chamber of the piezoelectric cavity (22) are symmetrically provided with abutment parts (25), and the piezoelectric cavity (22) is guided and pressed with the quartz dynamic piezoelectric sensor element (1) through the abutment parts (25); The web (21) is a curved structure, and the radius of curvature of the web (21) is between 10 mm and 16 mm.

2. The housing structure of a quartz dynamic piezoelectric sensor according to claim 1, characterized in that: The connection between the abutment portion (25) and the web (21) is a rounded structure.

3. The housing structure of a quartz dynamic piezoelectric sensor according to claim 1, characterized in that: The side protection layer (3) comprises a side protection portion (31) and an end protection portion (32); the side protection portion (31) is mounted on both sides of a plate frame of the web (21); the end protection portion (32) is mounted on both sides of a plate frame of an upper end pressure bearing portion (23); and the upper end of the end protection portion (32) remains flush with the end surface of the grinding layer (4).

4. The housing structure of a quartz dynamic piezoelectric sensor according to claim 3, characterized in that: The side protection portion (31) is a curved structure, and the inner curved surface of the side protection portion (31) fits snugly with the outer curved surface of the web (21).

5. The housing structure of a quartz dynamic piezoelectric sensor according to claim 3, characterized in that: The end protection portion (32) is an L-shaped structure, and the inner folded surface of the end protection portion (32) fits snugly with the combination of the pressure-bearing portion (23) and the side support surface of the grinding layer (4).

6. The housing structure of a quartz dynamic piezoelectric sensor according to claim 1, characterized in that: The upper and lower end surfaces of the pressure-bearing portion (23) are both provided with dovetail grooves (24), and the bottom of the grinding layer (4) is provided with a dovetail tenon (41) that engages with the dovetail groove (24) on the upper end surface of the pressure-bearing portion (23).

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