CN209764240U - Load cells and dynamic truck scales - Google Patents

Abstract

The utility model provides a load cell and a dynamic truck scale, wherein the load cell includes: an upper support body, on which a first installation hole is opened; a lower support body, on which a second installation hole is opened, The lower support body is arranged opposite to the upper support body, and an installation space is formed between the upper support body; the elastic deformation body is arranged in the installation space, and a strain gauge is attached to the elastic deformation body; the first connecting piece, the second A connector is fixed at the first installation hole, and a part of the first connector extends into the installation space and is fixedly connected with the elastic deformation body; a second connector, the second connector is fixed at the second installation hole, and the second A part of the connector protrudes into the installation space and is fixedly connected with the elastic deformation body. The utility model solves the problems in the prior art that the weighing sensor for the dynamic truck scale has unreasonable structure, poor impact resistance, easy damage and damage, and seriously affects the working stability of the truck scale.

Description

Load cells and dynamic truck scales

technical field

The utility model relates to the technical field of dynamic weighing, in particular to a structural improvement of a weighing sensor for a dynamic truck scale.

Background technique

Most of the existing truck scales use four load cells to support the load-carrying platform (i.e. simply supported structure), which transmits the entire weight of the vehicle to the load cell through the load-carrying platform, and the load cell senses the vertical downward force of the load-carrying platform. The pressure is used to generate an electrical signal, and then the vehicle weight is obtained by analyzing and processing the electrical signal generated by the load cell.

The structure of the load cell used in the dynamic truck scale in the prior art is unreasonable, its impact resistance is poor, and it is vulnerable to damage. Therefore, the working stability of the truck scale is seriously affected; in addition, the existing weighing The sensor also has the problem of poor waterproof and dustproof performance.

Utility model content

The main purpose of the utility model is to provide a weighing sensor and a dynamic truck scale to solve the unreasonable structure of the weighing sensor used in the dynamic truck scale in the prior art, its poor impact resistance, and the phenomenon of being vulnerable to damage , Seriously affect the working stability of the truck scale.

In order to achieve the above object, according to one aspect of the utility model, a weighing sensor is provided, including: an upper support body, on which a first installation hole is opened; a lower support body, on which a second mounting hole is opened; The installation hole, the lower support body is arranged opposite to the upper support body, and an installation space is formed between the upper support body; the elastic deformation body, the elastic deformation body is arranged in the installation space, and the strain gauge is attached to the elastic deformation body; the first connection The first connecting piece is fixed at the first mounting hole, and a part of the first connecting piece extends into the installation space and is fixedly connected with the elastic deformation body; the second connecting piece, the second connecting piece is fixed at the second mounting hole, And a part of the second connecting piece protrudes into the installation space and is fixedly connected with the elastic deformation body.

Further, the load cell also includes a deformation support ring, the deformation support ring is arranged in the installation space and is located on the outer peripheral side of the elastic deformation body, and the first end of the deformation support ring is connected to the upper support body, and the second end of the deformation support ring Connect with the lower support.

Further, the upper support body and the lower support body are both steel plates, the cross section of the deformation support ring is an axisymmetric figure, and the deformation support ring is welded to the upper support body and the lower support body.

Further, the rigidity of the elastically deformable body is smaller than that of the upper support body.

Further, the elastic deformation body is an S-shaped rib structure, wherein the elastic deformation body includes an upper connecting arm, a transition arm and a lower connecting arm connected in sequence, wherein the first connecting piece is connected with the upper connecting arm, and the second connecting arm is connected with the upper connecting arm. The piece is connected to the lower connecting arm.

Further, the elastic deformation body is made of steel plate, the first connecting piece and the second connecting piece are both steel elements, and both the first connecting piece and the second connecting piece are screwed to the elastic deformation body.

Further, the first mounting hole is a counterbore, the first connecting piece is a bolt, the first connecting piece stops at the step surface of the first mounting hole, and is threadedly connected with part of the inner wall surface of the first mounting hole; and/or The second mounting hole is a counterbore, the second connecting piece is a bolt, and the second connecting piece stops at the step surface of the second mounting hole and is threadedly connected with a part of the inner wall of the second mounting hole.

Further, there are multiple first mounting holes and multiple first connectors, and the multiple first mounting holes are provided in one-to-one correspondence with the multiple first connectors; there are multiple second mounting holes, and the second connectors are Multiple, multiple second mounting holes are provided in one-to-one correspondence with multiple second connecting pieces.

Further, the thickness of the upper support or the lower support is greater than or equal to 40 mm and less than or equal to 100 mm.

According to another aspect of the present utility model, a dynamic truck scale is provided, comprising: a support structure layer, used to connect with the installation foundation; Above, the surface of the load-bearing structure layer away from the support structure layer forms a load-bearing surface; the load cell, the load cell is the above-mentioned load cell, the upper support body of the load cell is fixedly connected with the load-bearing structure layer, and the load cell is weighed. The lower supporting body of the sensor is fixedly connected with the supporting structure layer.

Applying the technical solution of the utility model, by optimizing the structure of the load cell for dynamic truck scales, a load cell with a new structural form is provided. Specifically, the load cell includes an upper support body, a lower support body, an elastic The deformable body, the first connector and the second connector, wherein, the upper support body is provided with a first installation hole, the lower support body is provided with a second installation hole, the lower support body is arranged opposite to the upper support body, and is connected to the upper support body. An installation space is formed between the supports, the elastic deformation body is arranged in the installation space, the strain gauge is attached to the elastic deformation body, the first connector is fixed at the first installation hole, and a part of the first connector extends into the installation space And it is fixedly connected with the elastic deformation body, the second connecting piece is fixed at the second installation hole, and a part of the second connecting piece protrudes into the installation space and is fixedly connected with the elastic deformation body. The load cell of this structural form has strong impact resistance, good structural stability, and has the characteristics of long-term stable use, which effectively ensures the dynamic weighing measurement accuracy of the dynamic truck scale for the vehicle.

Specifically, when the vehicle passes the dynamic truck scale, the upper support body of the load cell is pressed by the vehicle, and then the pressure of the vehicle is transmitted to the elastic deformation body, and the deformation of the elastic deformation body will be measured by the strain gauge and converted The weighing signal is sent out to realize the dynamic weighing measurement of the vehicle by the load cell; the first connector of the dynamic truck scale of the present application is fixed by the first mounting hole of the upper support body and fixedly connected with the elastic deformation body, The second connecting piece is fixed by the second mounting hole of the lower support body and fixedly connected with the elastic deformation body, which not only ensures the connection stability between the upper support body, the elastic deformation body and the lower support body, but also effectively improves the weighing capacity. The overall structural strength of the sensor.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows a schematic structural view of a load cell according to an optional embodiment of the present invention;

FIG. 2 shows a schematic diagram of the internal structure of the load cell in FIG. 1 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

100. Installation space; 10. Upper support body; 11. First installation hole; 20. Lower support body; 21. Second installation hole; 30. Elastic deformation body; 31. Upper connecting arm; 32. Transition arm; 33. Lower connecting arm; 40, first connecting piece; 50, second connecting piece; 60, deformation support ring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In order to solve the problems of unreasonable structure of the load cell used in the dynamic truck scale in the prior art, its poor impact resistance, the phenomenon of being easily damaged and damaged, which seriously affects the working stability of the truck scale, the utility model provides a A load cell and a dynamic truck scale, wherein the dynamic truck scale includes a support structure layer, a load-bearing structure layer and a load cell, the support structure layer is used to connect with the installation foundation, the load-bearing structure layer and the support structure layer are arranged at intervals, and are located on the support Above the structural layer, the surface of the load-bearing structural layer away from the supporting structural layer forms a load-bearing surface, and the load cell is the above-mentioned and following load cell, and the upper support body 10 of the load cell is fixedly connected to the load-bearing structural layer , the lower support body 20 of the load cell is fixedly connected with the support structure layer. The dynamic truck scale of this structure not only has high precision in dynamic weighing and measurement of vehicles, but also has low processing and manufacturing costs and high practicability.

As shown in Figures 1 and 2, by optimizing the structure of the load cell for dynamic truck scales, a load cell with a new structural form is provided. Specifically, the load cell includes an upper support body 10, a lower support body 20. The elastic deformable body 30, the first connector 40 and the second connector 50, wherein the upper support 10 is provided with a first installation hole 11, and the lower support 20 is provided with a second installation hole 21, and the lower support 20 is provided with a second installation hole 21. 20 is set opposite to the upper support body 10, and an installation space 100 is formed between the upper support body 10, the elastic deformation body 30 is arranged in the installation space 100, the elastic deformation body 30 is attached with a strain gauge, and the first connecting piece 40 is fixed At the first installation hole 11, and a part of the first connecting member 40 extends into the installation space 100 and is fixedly connected with the elastic deformation body 30, the second connecting member 50 is fixed at the second installing hole 21, and the second connecting member 50 A part protrudes into the installation space 100 and is fixedly connected with the elastic deformation body 30 . The load cell of this structural form has strong impact resistance, good structural stability, and has the characteristics of long-term stable use, which effectively ensures the dynamic weighing measurement accuracy of the dynamic truck scale for the vehicle.

Specifically, when the vehicle passes the dynamic truck scale, the upper support body 10 of the load cell is pressed by the vehicle, and then the pressure of the vehicle is transmitted to the elastic deformation body 30, and the deformation of the elastic deformation body 30 will be detected by the strain gauge The measurement is then converted into a weighing signal and sent out to realize the dynamic weighing measurement of the vehicle by the load cell; the first connector 40 of the dynamic truck scale of the present application is fixed by the first mounting hole 11 of the upper support body 10 and connected with The elastic deformation body 30 is fixedly connected, and the second connecting member 50 is fixed by the second mounting hole 21 of the lower support body 20 and fixedly connected with the elastic deformation body 30, which not only ensures that the upper support body 10, the elastic deformation body 30 and the lower support body 20 The stability of the connection between them, and effectively improve the overall structural strength of the load cell.

As shown in Figures 1 and 2, the load cell further includes a deformation support ring 60, the deformation support ring 60 is arranged in the installation space 100 and is located on the outer peripheral side of the elastic deformation body 30, and the first end of the deformation support ring 60 and the upper The supporting body 10 is connected, and the second end of the deformable supporting ring 60 is connected with the lower supporting body 20 . The deformation support ring 60 can not only play a role in supporting the upper support body 10 and the lower support body 20 in the circumferential direction, avoid the irreversible deformation of the elastic deformation body 30 due to excessive force, and ensure the working stability of the load cell, but also the deformation The support ring 60 can also play a role of sealing and protecting the elastic deformable body 30, preventing rainwater or dust from entering the installation space 100 and contacting the strain gauges to affect the weighing measurement accuracy of the load cell.

Optionally, both the upper support body 10 and the lower support body 20 are steel plates, the cross section of the deformable support ring 60 is an axisymmetric figure, and the deformable support ring 60 is welded to the upper support body 10 and the lower support body 20 . The structural parts of the load cell with this structure are easy to obtain materials, thereby reducing the difficulty of processing and manufacturing the load cell, improving the economy of the load cell, and benefiting the improvement of the market competitiveness of the dynamic truck scale.

Optionally, the cross-sectional shape of the deformable support ring 60 is one of a circular ring, an elliptical ring, and a polygonal ring.

In order to ensure that the elastic deformation body 30 is more easily deformed than the upper support body 10 when under pressure, optionally, the stiffness of the elastic deformation body 30 is smaller than that of the upper support body 10 .

As shown in Figure 2, the elastic deformation body 30 is an S-shaped rib structure, wherein the elastic deformation body 30 includes an upper connecting arm 31, a transition arm 32 and a lower connecting arm 33 connected in sequence, wherein the first connecting member 40 It is connected with the upper connecting arm 31 , and the second connecting member 50 is connected with the lower connecting arm 33 . In this way, the upper connecting arm 31 and the lower connecting arm 33 act as a force buffer, effectively improving the elastic deformation capacity of the elastic deformable body 30 .

In consideration of the manufacturing economy of the elastic deformation body 30 and the connection stability with the first connector 40 and the second connector 50, optionally, the elastic deformation body 30 is made of a steel plate, and the first connector 40 and the second connection The pieces 50 are all made of steel, and both the first connecting piece 40 and the second connecting piece 50 are screwed to the elastic deformation body 30 .

In the illustrated embodiment of the present application, in order to further simplify the structure of the load cell, so that the load cell is convenient to manufacture and reduce its economic cost, the first mounting hole 11 is a counterbore, the first connecting member 40 is a bolt, and the first mounting hole 11 is a counterbore. A connecting piece 40 stops at the step surface of the first mounting hole 11, and is threadedly connected with part of the inner wall surface of the first mounting hole 11; and/or the second mounting hole 21 is a counterbore, and the second connecting piece 50 is a bolt , the second connecting member 50 stops at the stepped surface of the second mounting hole 21 and is threadedly connected to a part of the inner wall of the second mounting hole 21 .

Optionally, there are multiple first mounting holes 11 and multiple first connectors 40, and the multiple first mounting holes 11 are set in one-to-one correspondence with the multiple first connectors 40; the second mounting holes 21 are multiple , there are multiple second connecting pieces 50 , and the multiple second mounting holes 21 are provided in one-to-one correspondence with the multiple second connecting pieces 50 . In this way, the connection stability between the first connecting member 40 , the elastic deformation body 30 and the second connecting member 50 is effectively improved, and the overall structural stability of the load cell is ensured.

Optionally, in order to ensure that the upper support body 10 and the lower support body 20 have sufficient structural strength to effectively withstand the pressure of the vehicle, and fatigue damage will not occur under the pressure of the vehicle, the upper support body 10 or the lower support body 20 The thickness is greater than or equal to 40mm and less than or equal to 100mm.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numbers and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A load cell, characterized in that, comprising: An upper support body (10), the upper support body (10) is provided with a first installation hole (11); A lower support body (20), the second mounting hole (21) is opened on the lower support body (20), the lower support body (20) is arranged opposite to the upper support body (10), and is connected to the An installation space (100) is formed between the upper supports (10); an elastic deformation body (30), the elastic deformation body (30) is arranged in the installation space (100), and a strain gauge is attached to the elastic deformation body (30); The first connecting piece (40), the first connecting piece (40) is fixed at the first installation hole (11), and a part of the first connecting piece (40) extends into the installation space (100) ) and is fixedly connected with the elastic deformation body (30); The second connecting piece (50), the second connecting piece (50) is fixed at the second installation hole (21), and a part of the second connecting piece (50) extends into the installation space (100) ) and fixedly connected with the elastic deformation body (30). 2. The load cell according to claim 1, characterized in that, the load cell further comprises a deformation support ring (60), and the deformation support ring (60) is arranged in the installation space (100) and It is located on the outer peripheral side of the elastic deformation body (30), and the first end of the deformation support ring (60) is connected to the upper support body (10), and the second end of the deformation support ring (60) is connected to the upper support body (10). The lower support body (20) is connected. 3. The load cell according to claim 2, characterized in that, the upper support body (10) and the lower support body (20) are steel plates, and the cross section of the deformation support ring (60) is Axisymmetric figures, and the deformation support ring (60) is welded to the upper support body (10) and the lower support body (20). 4. The load cell according to claim 1, characterized in that, the rigidity of the elastically deformable body (30) is smaller than the rigidity of the upper support body (10). 5. The load cell according to claim 1, characterized in that, the elastic deformation body (30) is an S-shaped rib structure, wherein the elastic deformation body (30) includes sequentially connected upper connections arm (31), transition arm (32) and lower connecting arm (33), wherein the first connecting piece (40) is connected to the upper connecting arm (31), and the second connecting piece (50) is connected to The lower connecting arm (33) is connected. 6. The load cell according to claim 5, characterized in that, the elastically deformable body (30) is made of a steel plate, and the first connector (40) and the second connector (50) are both It is a steel element, and both the first connecting piece (40) and the second connecting piece (50) are threadedly connected to the elastic deformation body (30). 7. The load cell according to claim 1, characterized in that, The first mounting hole (11) is a counterbore, the first connecting piece (40) is a bolt, and the first connecting piece (40) stops at the step surface of the first mounting hole (11) , and threaded with part of the inner wall surface of the first mounting hole (11); and/or The second mounting hole (21) is a counterbore, the second connecting piece (50) is a bolt, and the second connecting piece (50) stops at the step surface of the second mounting hole (21) , and threadedly connected with part of the inner wall surface of the second mounting hole (21). 8. The load cell according to claim 7, characterized in that there are multiple first mounting holes (11), multiple first connecting parts (40), and multiple first mounting holes The holes (11) are provided in one-to-one correspondence with the plurality of first connectors (40); the second mounting holes (21) are multiple, the second connectors (50) are multiple, and the plurality of The second mounting holes (21) are provided in one-to-one correspondence with the plurality of second connecting pieces (50). 9. The load cell according to claim 1, characterized in that, the thickness of the upper support body (10) or the lower support body (20) is greater than or equal to 40 mm and less than or equal to 100 mm. 10. A dynamic truck scale, characterized in that it comprises: support structure layer for connection with the installation foundation; A load-bearing structure layer, the load-bearing structure layer is arranged at intervals from the support structure layer, and is located above the support structure layer, and the surface of the load-bearing structure layer on the side away from the support structure layer forms a weighing bearing surface; A load cell, the load cell is the load cell described in any one of claims 1 to 9, the upper support body (10) of the load cell is fixedly connected with the load-bearing structure layer, and the load cell The lower support body (20) of the heavy sensor is fixedly connected with the support structure layer.