Vehicle plate spring vehicle-mounted weighing structure

Abstract

The utility model relates to the technical field of vehicle-mounted weighing, and discloses a vehicle leaf spring vehicle-mounted weighing structure, which comprises a piezoelectric resonant force measurement sensor and a vehicle leaf spring on a vehicle, the piezoelectric resonant force measurement sensor is arranged on the vehicle leaf spring and comprises an installation plate capable of elastically bending and deforming, and the installation plate is arranged on the vehicle leaf spring. The mounting plate is fixedly connected to a vehicle plate spring, the vehicle plate spring extrudes the mounting plate to carry out bending deformation, the mounting plate is provided with a piezoelectric resonance sensing unit, and the piezoelectric resonance sensing unit abuts against the mounting plate. According to the vehicle-mounted weighing structure of the vehicle plate spring, the mounting plate is extruded by the vehicle plate spring to bend and deform, and then the piezoelectric resonance sensing unit is extruded by the mounting plate to sense and measure the force, so that the sensing is sensitive, the precision is high, and the anti-interference capability is strong; the weighing function is achieved through the piezoelectric resonant force measuring sensor and the original vehicle plate spring of the vehicle, the structure is simple, and the production cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle weighing, and particularly relates to a vehicle leaf spring vehicle weighing structure. Background Art

[0002] Monitoring and measuring the load condition is an important part of ensuring traffic safety. And with the strict control of freight overload in recent years, more attention has been paid to the vehicle load condition. For example, in a specific scenario, in order not to overload, a truck driver needs to rely on experience to judge whether it is overloaded when loading goods. However, when dealing with unfamiliar goods, it is difficult to judge whether it is overloaded by experience. After loading the goods, the truck is driven to a weighbridge for weighing. If it is overweight, it needs to return to the loading point for unloading; if it is not overweight, in order to achieve greater economic benefits, it often returns to continue loading until the critical load limit. This way of monitoring the vehicle load is relatively cumbersome; moreover, even a truck driver who is familiar with the goods and has rich experience is difficult to accurately estimate, so a weighing structure is needed for weighing. In the existing vehicle weighing structure, the strain generated by the sensitive unit of the sensor under an external force (pressure) is not obvious, and the stress change under different pressures is not obvious, resulting in low measurement accuracy and poor sensitivity; in addition, some existing force measurement sensors and vehicle weighing structures have a relatively complex structure and high production costs. Content of the Utility Model

[0003] To solve at least one of the above problems, the utility model provides a vehicle leaf spring vehicle weighing structure, including: a piezoelectric resonant force measurement sensor and a vehicle leaf spring on the vehicle. The piezoelectric resonant force measurement sensor is arranged on the vehicle leaf spring. The piezoelectric resonant force measurement sensor includes a mounting plate that can be elastically bent and deformed. The mounting plate is fixedly connected to the vehicle leaf spring. The vehicle leaf spring squeezes the mounting plate to cause bending deformation. A piezoelectric resonant sensitive unit is arranged on the mounting plate. The piezoelectric resonant sensitive unit abuts against the mounting plate. Stress is generated on the piezoelectric resonant sensitive unit through the deformation and bending of the mounting plate. The piezoelectric resonant sensitive unit converts the stress into an electrical signal. The mounting plate includes a mounting portion. One side of the piezoelectric resonant sensitive unit abuts against the mounting portion. In the vehicle leaf spring vehicle weighing structure of the utility model, the mounting plate is squeezed by the vehicle leaf spring to cause bending deformation, and then the piezoelectric resonant sensitive unit is squeezed by the mounting plate to sense the force. The induction is sensitive, the accuracy is high, and the anti-interference ability is strong; the weighing function is realized through the piezoelectric resonant force measurement sensor and the original vehicle leaf spring of the vehicle, and the structure is simple and the production cost is low.

[0004] Optionally, a material reduction groove is arranged at the mounting portion to make the mounting portion easy to deform.

[0005] Optionally, the material-removing groove includes a recess for reducing the width of the mounting portion located at the middle position of the mounting plate.

[0006] Optionally, the recess is in the shape of an isosceles trapezoid.

[0007] Optionally, the recess includes a first recess and a second recess symmetrically distributed on both sides of the mounting portion.

[0008] Optionally, a material-removing groove is provided at the mounting portion to make the mounting portion deformable easily. The material-removing groove further includes a mounting groove provided on a side of the mounting portion close to the piezoelectric resonance sensing unit, and one side of the piezoelectric resonance sensing unit is placed in the mounting groove.

[0009] Optionally, the mounting groove is provided through along the width direction of the mounting portion.

[0010] Optionally, a protective cover corresponding to the piezoelectric resonance sensing unit is provided on the mounting plate, and the piezoelectric resonance sensing unit is placed inside the protective cover.

[0011] Optionally, the protective cover is filled with a soft sealing glue.

[0012] Optionally, the piezoelectric resonance sensing unit includes a substrate, a strain gauge and a processing chip. Both the strain gauge and the processing chip are electrically connected to the substrate. The strain gauge is placed on a side of the substrate close to the mounting portion and abuts against the mounting portion, and the processing chip is placed on a side of the substrate away from the mounting portion.

[0013] Compared with the prior art, in the vehicle leaf spring vehicle weighing structure of the present utility model, the mounting plate is bent and deformed under the extrusion of the vehicle leaf spring, and then the piezoelectric resonance sensing unit is extruded by the mounting plate to sense the force. Only through one part of the mounting plate, the force is transmitted to the piezoelectric resonance sensing unit for induction, and the transmission is relatively direct, with sensitive induction, high precision and strong anti-interference ability; the weighing function is realized through the piezoelectric resonance force measurement sensor and the original vehicle leaf spring of the vehicle, with simple structure and low production cost; a material-removing groove is provided at the mounting portion to make the mounting portion deformable easily. The setting of the material-removing groove makes it easier for the mounting plate and the mounting portion to bend and deform under the same force, and it is also easier to generate stress on the piezoelectric resonance sensing unit, that is, the induction is more sensitive; when stressed, the bending and deformation amplitude of the mounting plate and the mounting portion is also larger, making the stress range generated on the piezoelectric resonance sensing unit larger, that is, the induction precision is higher; a protective cover corresponding to the piezoelectric resonance sensing unit is provided on the mounting plate; the protective cover can protect the piezoelectric resonance sensing unit, for example, playing protective functions such as dust-proof, waterproof and anti-collision, making the piezoelectric resonance sensing unit operate stably, reliable in use, not easily damaged and having a long service life. Description of the Drawings

[0014] Figure 1 This is a schematic structural diagram of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0015] Figure 2 This is a schematic structural diagram of the piezoelectric resonant force measurement sensor of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0016] Figure 3 This is an exploded view of the piezoelectric resonant force measurement sensor of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0017] Figure 4 This is a sectional view of the piezoelectric resonant force measurement sensor of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0018] Figure 5 This is a top view of the piezoelectric resonant force measurement sensor of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0019] Figure 6 This is a bottom view of the piezoelectric resonant force measurement sensor of the vehicle leaf spring vehicle-mounted weighing structure of the present utility model;

[0020] The corresponding component names for the reference numerals in the figures are: 1 is the mounting plate, 10 is the material removal groove, 100 is the piezoelectric resonant force measurement sensor, 101 is the mounting portion, 102 is the groove, 1021 is the first groove, 1022 is the second groove, 103 is the mounting groove, 2 is the piezoelectric resonant sensitive unit, 21 is the substrate, 22 is the strain gauge, 23 is the processing chip, 3 is the protective cover, 4 is the soft sealant, 5 is the vehicle leaf spring, and 6 is the bolt hole. Detailed Description of the Preferred Embodiments

[0021] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be provided with reference to the accompanying drawings.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationships during the normal use of the product.

[0023] The terms "first", "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features.

[0024] Refer to Figures 1-6, an embodiment of the present utility model provides a vehicle leaf spring vehicle-mounted weighing structure, including: a piezoelectric resonant force measurement sensor 100 and a vehicle leaf spring 5 on the vehicle. The piezoelectric resonant force measurement sensor 100 is disposed on the vehicle leaf spring 5. The piezoelectric resonant force measurement sensor 100 includes an installation plate 1 that can be elastically bent and deformed. The installation plate 1 is fixedly connected to the vehicle leaf spring 5. In this embodiment, the installation plate 1 is fixedly connected to the upper side of the vehicle leaf spring 5 by means of glue, welding, bolts, etc. The heavier the vehicle load, the smaller the bending deformation of the vehicle leaf spring 5 and the installation plate 1, and the smaller the strain generated by the piezoelectric resonant force measurement sensor 100. The vehicle load is calculated through an algorithm program; the induction method of generating strain in the piezoelectric resonant sensitive unit 2 through the deformation of the vehicle leaf spring and the installation plate 1 avoids the large resultant force of the vehicle and its load directly acting on the piezoelectric resonant sensitive unit 2 and causing damage to it. The weighing function is realized through the load deformation of the vehicle axle. The design is ingenious, the structure is simple, and the production and maintenance costs are low; the vehicle leaf spring 5 squeezes the installation plate 1 to cause bending deformation. The installation plate 1 is provided with a piezoelectric resonant sensitive unit 2. The piezoelectric resonant sensitive unit 2 has the advantages of sensitive induction, high precision, strong anti-interference ability, etc. In this embodiment, a quartz piezoelectric resonant sensitive unit 2 is adopted; the piezoelectric resonant sensitive unit 2 abuts against the installation plate 1, and stress is generated on the piezoelectric resonant sensitive unit 2 through the deformation and bending of the installation plate 1. The stress is converted into an electrical signal by the piezoelectric resonant sensitive unit 2. The installation plate 1 includes an installation portion 101, and one side of the piezoelectric resonant sensitive unit 2 abuts against the installation portion 101; in the vehicle leaf spring vehicle-mounted weighing structure of the present utility model, the installation plate is bent and deformed under the extrusion of the vehicle leaf spring, and then the piezoelectric resonant sensitive unit is extruded through the installation plate for induction force measurement, with sensitive induction, high precision, and strong anti-interference ability; the weighing function is realized through the piezoelectric resonant force measurement sensor and the original vehicle leaf spring of the vehicle, with a simple structure and low production cost.

[0025] Refer to Figures 2-6 , a material reduction groove 10 is provided at the installation portion 101 to make the installation portion 101 easy to deform. The setting of the material reduction groove 10 makes it easier for the installation plate 1 and the installation portion 101 to bend and deform under the same force, and it is also easier to generate stress on the piezoelectric resonant sensitive unit 2, that is, the induction is more sensitive; when stressed, the bending deformation amplitude of the installation plate 1 and the installation portion 101 is also larger, making the stress range generated on the piezoelectric resonant sensitive unit 2 larger, that is, the induction precision is higher; the material reduction groove 10 includes a groove 102, and the groove 102 is used to reduce the width of the installation portion 101 (the width is Figure 2The mounting portion 101 is located in the middle or approximately in the middle of the mounting plate 1. When bent, the deformation amplitude of the middle of the mounting plate 1 is the largest, thereby improving the sensitivity and accuracy of the piezoelectric resonance sensitive unit 2. The groove 102 is in the shape of an isosceles trapezoid, which is convenient for the mounting portion 101 to deform. The groove 102 can also be set to other shapes that are easy to deform. The groove 102 includes a first groove 1021 and a second groove 1022. The first groove 1021 and the second groove 1022 are symmetrically distributed on both sides of the mounting portion 101. The grooves are added to increase the amount of material reduction, which is convenient for the deformation of the mounting portion 101.

[0026] See also Figure 2 and Figure 3 The mounting portion 101 is provided with a material reduction groove 10 to make the mounting portion 101 easy to deform. The material reduction groove 10 also includes a mounting groove 103. The mounting groove 103 is provided on one side of the mounting portion 101 close to the piezoelectric resonance sensitive unit 2. The mounting groove 103 is used to reduce the thickness of the mounting portion (the thickness is Figure 2 The distance in the Z-axis direction), one side of the piezoelectric resonance sensitive unit 2 is placed in the mounting groove 103; the mounting groove 103 is set through along the width direction of the mounting portion 101. Compared with the non-through setting, the through setting can reduce more materials and is easier for the mounting portion 101 to deform.

[0027] See also Figures 2-6 A protective cover 3 corresponding to the piezoelectric resonance sensitive unit 2 is provided on the mounting plate 1, and the piezoelectric resonance sensitive unit 2 is placed on the inner side of the protective cover 3. The protective cover 3 and the mounting plate 1 are fixed by glue, welding, etc. The protective cover 3 can protect the piezoelectric resonance sensitive unit 2, such as dustproof, waterproof, anti-collision and other protective functions, so that the piezoelectric resonance sensitive unit 2 can run stably, use reliably, not easy to be damaged, and have a long service life; the protective cover 3 is filled with soft sealant 4, which has good waterproof sealing performance, improves dustproof and waterproof performance, impact resistance, and is easy to deform with the mounting plate 1. If it is filled with hard glue, it will be unfavorable for the deformation of the mounting part. In this embodiment, the soft sealant 4 is epoxy resin glue; piezoelectric resonance The sensitive unit 2 includes a substrate 21, a strain gauge 22 and a processing chip 23. The strain gauge 22 and the processing chip 23 are both electrically connected to the substrate 21. The strain gauge 22 is placed on a side of the substrate 21 close to the mounting portion 101, so that the strain gauge 22 is squeezed by the mounting portion 101 to generate stress and is sensitive. The strain gauge 22 is against the mounting portion 101, and the processing chip 23 is placed on a side of the substrate 21 away from the mounting portion 101 to avoid damage to the chip due to the large stress of the mounting portion 101. The structure is reliable and stable with a long service life. The substrate 21 is connected to an external device through a wire to transmit the signal to the external device. Bolt holes 6 are provided on the mounting plate 1 to facilitate fixing the mounting plate 1 to an external part by bolts.

[0028] The on-vehicle weighing structure of the vehicle leaf spring of the present utility model. The mounting plate is bent and deformed under the extrusion of the vehicle leaf spring, and then the piezoelectric resonance sensitive unit is extruded by the mounting plate to sense the force. Only through one part, namely the mounting plate, the force is transmitted to the piezoelectric resonance sensitive unit for sensing. The transmission is relatively direct, the sensing is sensitive, the precision is high, and the anti-interference ability is strong. The weighing function is realized through the piezoelectric resonance force measurement sensor and the original vehicle leaf spring of the vehicle. The structure is simple and the production cost is low. A material reduction groove is provided at the mounting part to make the mounting part easy to deform. The setting of the material reduction groove makes it easier for the mounting plate and the mounting part to bend and deform under the same force, and it is also easier to generate stress on the piezoelectric resonance sensitive unit, that is, the sensing is more sensitive. When stressed, the bending and deformation amplitude of the mounting plate and the mounting part is also larger, so that the stress range generated on the piezoelectric resonance sensitive unit is larger, that is, the sensing precision is higher. A protective cover corresponding to the piezoelectric resonance sensitive unit is provided on the mounting plate. The protective cover can play a protective role for the piezoelectric resonance sensitive unit, such as dust-proof, waterproof, anti-collision and other protective functions, so that the piezoelectric resonance sensitive unit operates stably, is reliable in use, is not easily damaged, and has a long service life.

[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model.

Claims

1. A vehicle leaf spring on-board weighing structure, characterized in that: include: A piezoelectric resonant force measuring sensor (100) and a vehicle leaf spring (5) on a vehicle, wherein the piezoelectric resonant force measuring sensor (100) is arranged on the vehicle leaf spring (5), and the piezoelectric resonant force measuring sensor (100) comprises a mounting plate (1) capable of elastic bending and deformation, wherein the mounting plate (1) is fixedly connected to the vehicle leaf spring (5), and the mounting plate (1) is bent and deformed by being pressed by the vehicle leaf spring (5), and a piezoelectric resonant sensitive unit (2) is arranged on the mounting plate (1), and the piezoelectric resonant sensitive unit (2) is abutted against the mounting plate (1), and stress is generated on the piezoelectric resonant sensitive unit (2) through deformation and bending of the mounting plate (1), and the stress is converted into an electrical signal by the piezoelectric resonant sensitive unit (2), and the mounting plate (1) comprises a mounting portion (101), and one side of the piezoelectric resonant sensitive unit (2) is abutted against the mounting portion (101).

2. The vehicle leaf spring on-board weighing structure according to claim 1, characterized in that: The mounting portion (101) is provided with a material-reducing groove (10) to facilitate deformation of the mounting portion (101).

3. The vehicle leaf spring on-board weighing structure according to claim 2, characterized in that: The material-reducing groove (10) comprises a groove (102), wherein the groove (102) is used to reduce the width of the mounting portion (101), and the mounting portion (101) is located in the middle of the mounting plate (1).

4. The vehicle leaf spring on-board weighing structure according to claim 3, characterized in that: The groove (102) is in the shape of an isosceles trapezoid.

5. The vehicle leaf spring on-board weighing structure according to claim 3, characterized in that: The groove (102) comprises a first groove (1021) and a second groove (1022), and the first groove (1021) and the second groove (1022) are symmetrically distributed on two sides of the mounting portion (101).

6. The vehicle leaf spring on-board weighing structure according to claim 1, characterized in that: The mounting portion (101) is provided with a material-reducing groove (10) to facilitate deformation of the mounting portion (101); the material-reducing groove (10) further comprises a mounting groove (103); the mounting groove (103) is provided on a side of the mounting portion (101) close to the piezoelectric resonance sensitive unit (2); and one side of the piezoelectric resonance sensitive unit (2) is placed in the mounting groove (103).

7. The vehicle leaf spring on-board weighing structure according to claim 6, characterized in that: The mounting groove (103) is arranged to penetrate along the width direction of the mounting portion (101).

8. The vehicle leaf spring on-board weighing structure according to claim 1, characterized in that: The mounting plate (1) is provided with a protective cover (3) corresponding to the piezoelectric resonance sensitive unit (2), and the piezoelectric resonance sensitive unit (2) is placed inside the protective cover (3).

9. The vehicle leaf spring on-board weighing structure according to claim 8, characterized in that: The protective cover (3) is filled with soft sealing glue (4).

10. The vehicle leaf spring on-board weighing structure according to any one of claims 1 to 9, characterized in that: The piezoelectric resonance sensitive unit (2) comprises a substrate (21), a strain gauge (22) and a processing chip (23); the strain gauge (22) and the processing chip (23) are both electrically connected to the substrate (21); the strain gauge (22) is placed on a side of the substrate (21) close to the mounting portion (101); the strain gauge (22) abuts against the mounting portion (101); and the processing chip (23) is placed on a side of the substrate (21) away from the mounting portion (101).

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